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Class 11 Physics Assignments

We have provided below free printable Class 11 Physics Assignments for Download in PDF. The Assignments have been designed based on the latest NCERT Book for Class 11 Physics . These Assignments for Grade 11 Physics cover all important topics which can come in your standard 11 tests and examinations. Free printable Assignments for CBSE Class 11 Physics , school and class assignments, and practice test papers have been designed by our highly experienced class 11 faculty. You can free download CBSE NCERT printable Assignments for Physics Class 11 with solutions and answers. All Assignments and test sheets have been prepared by expert teachers as per the latest Syllabus in Physics Class 11. Students can click on the links below and download all Pdf Assignments for Physics class 11 for free. All latest Kendriya Vidyalaya Class 11 Physics Assignments with Answers and test papers are given below.

Physics Class 11 Assignments Pdf Download

We have provided below the biggest collection of free CBSE NCERT KVS Assignments for Class 11 Physics . Students and teachers can download and save all free Physics assignments in Pdf for grade 11th. Our expert faculty have covered Class 11 important questions and answers for Physics as per the latest syllabus for the current academic year. All test papers and question banks for Class 11 Physics and CBSE Assignments for Physics Class 11 will be really helpful for standard 11th students to prepare for the class tests and school examinations. Class 11th students can easily free download in Pdf all printable practice worksheets given below.

Topicwise Assignments for Class 11 Physics Download in Pdf

Advantages of Class 11 Physics Assignments

• As we have the best and largest collection of Physics assignments for Grade 11, you will be able to easily get full list of solved important questions which can come in your examinations.
• Students will be able to go through all important and critical topics given in your CBSE Physics textbooks for Class 11 .
• All Physics assignments for Class 11 have been designed with answers. Students should solve them yourself and then compare with the solutions provided by us.
• Class 11 Students studying in per CBSE, NCERT and KVS schools will be able to free download all Physics chapter wise worksheets and assignments for free in Pdf
• Class 11 Physics question bank will help to improve subject understanding which will help to get better rank in exams

Frequently Asked Questions by Class 11 Physics students

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We provide here Standard 11 Physics chapter-wise assignments which can be easily downloaded in Pdf format for free.

You can click on the links above and get assignments for Physics in Grade 11, all topic-wise question banks with solutions have been provided here. You can click on the links to download in Pdf.

We have provided here topic-wise Physics Grade 11 question banks, revision notes and questions for all difficult topics, and other study material.

We have provided the best collection of question bank and practice tests for Class 11 for all subjects. You can download them all and use them offline without the internet.

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NCERT Solutions for Class 11 Physics

NCERT Solutions for Class 11 Physics in Hindi and English Medium PDF format are available to download updated for new academic session 2024-25. CBSE Class 11 Physics NCERT Solutions are a set of comprehensive and detailed answers, explanations, and solutions for the exercises and problems presented in the Class 11 Physics textbook published by the National Council of Educational Research and Training (NCERT). These solutions are designed to help students understand and master the concepts covered in the Physics curriculum for Class 11 under the Central Board of Secondary Education (CBSE) in India. Get here Solutions of Exercises, Additional Exercises, Supplementary material and NCERT books. Class 11 Physics Chapter Wise NCERT Solutions Chapter 1. Units and Measurements Chapter 2. Motion in a Straight Line Chapter 3. Motion in a Plane Chapter 4. Laws of Motion Chapter 5. Work, Energy and Power Chapter 6. System of Particles and Rotational Motion Chapter 7. Gravitation Chapter 8. Mechanical Properties of Solids Chapter 9. Mechanical Properties of Fluids Chapter 10. Thermal Properties of Matter Chapter 11. Thermodynamics Chapter 12. Kinetic Theory Chapter 13. Oscillations Chapter 14. Waves The CBSE Class 11 Physics NCERT Solutions offer step-by-step explanations for the various types of questions and problems found in the textbook. These solutions cover a wide range of topics in physics, including mechanics, thermodynamics, waves, optics, electromagnetism, and more. By providing clear explanations, diagrams, graphs, and examples, these solutions aim to make complex physics concepts accessible and understandable to students.

Offline Apps based on latest NCERT Solutions for (+1) are available to download along with the answers given at the end of the book. Key features and benefits of CBSE Class 11 Physics NCERT Solutions are given here. The solutions help students develop a strong understanding of fundamental physics concepts, laying the foundation for advanced topics in Class 12 and beyond. Revision books, based on Latest CBSE Syllabus, for each chapter as well as notes of each chapter are available to download in PDF format. Chapter tests and assignments will be uploaded time to time. Class 11 Physics NCERT Solutions align with the CBSE curriculum, making them valuable study materials for exams, including school exams and board exams. If you are having any suggestion for the improvement, your are welcome. The improvement of the website and its contents are based on your suggestion and feedback.

The solutions include practice exercises that allow students to apply their knowledge and practice problem-solving skills. These follow a logical sequence, guiding students through the thought process required to solve different types of physics problems. Class 11 Physics  NCERT text book solutions  are given here to download in PDF. Extra study material covering the whole syllabus divided into 10 units will help the students in revising the complete course.  Unit 1  contains the material related to dimension and measurement,  Unit 2  is covering Kinematics,  Unit 3  covers the newton’s law of motion, similarly the  Unit 4 ,  Unit 5 ,   Unit 6 ,  Unit 7 ,  Unit 8 ,  Unit 9  and  Unit 10  covers the entire curriculum. Many physics concepts are explained using diagrams, graphs, and illustrations to enhance understanding. The solutions often include real-world examples that demonstrate the practical applications of physics concepts.

NCERT Book solutions are prepared by experienced educators and experts in the field. This ensures that the content is accurate, reliable, and follows the best pedagogical practices. Strong comprehension of Class 11 physics concepts facilitated by these solutions can help students prepare for various competitive entrance exams. CBSE Class 11 Physics NCERT Solutions are designed to be self-explanatory, making them suitable for self-study and independent learning. In essence, Class 11 Physics NCERT solutions play a crucial role in helping students lay a solid foundation in physics, providing them with the necessary skills and knowledge to excel in their studies and future pursuits.

Chapter Wise Study material for Class 11 Physics Unit 1 to 10

• Class 11 Physics Study Material Unit 1
• Class 11 Physics Study Material Unit 2
• Class 11 Physics Study Material Unit 3
• Class 11 Physics Study Material Unit 4
• Class 11 Physics Study Material Unit 5
• Class 11 Physics Study Material Unit 6
• Class 11 Physics Study Material Unit 7
• Class 11 Physics Study Material Unit 8
• Class 11 Physics Study Material Unit 9
• Class 11 Physics Study Material Unit 10

11th Physics solutions are prepared by subject matter experts, ensuring accuracy and quality in the explanations and solutions provided. Overall, CBSE Class 11 Physics NCERT Solutions serve as a valuable resource to help students master the subject, develop problem-solving skills, and prepare for exams and future academic pursuits in the field of physics or related disciplines.

Chapter Wise Revision Books for Class 11 Physics

• Revision Book Chapter 1: Units and Measurements
• Revision Book Chapter 2: Motion in a Straight Line
• Revision Book Chapter 3: Motion in a Plane
• Revision Book Chapter 4: Laws of Motion
• Revision Book Chapter 5: Work, Energy and Power
• Revision Book Chapter 6: System of Particles and Rotational Motion
• Revision Book Chapter 7: Gravitation
• Revision Book Chapter 8: Mechanical Properties of Solids
• Revision Book Chapter 9: Mechanical Properties of Fluids
• Revision Book Chapter 10: Thermal Properties of Matter
• Revision Book Chapter 11: Thermodynamics
• Revision Book Chapter 12: Kinetic Theory
• Revision Book Chapter 13: Oscillations
• Revision Book Chpater 14: Waves
• Revision Books Solutions and Answers Part 1
• Revision Books Solutions and Answers Part 2

The NCERT solutions for Class 11 Physics hold significant importance for students. Physics is a fundamental subject that forms the basis for many scientific and technical fields. Here’s why Class 11 Physics Tiwari Academy NCERT solutions are important. Class 11 Physics introduces students to essential concepts that lay the groundwork for more advanced topics in higher classes.

The work ‘Physics’ has originated from Greek work fusis, meaning nature. So, in physics we deal with nature and natural phenomena. We understand nature only through the study matter, energy and their interactions. The solutions provided in NCERT textbooks and their solutions align closely with the CBSE Class 11 Physics syllabus. As a result, studying these solutions thoroughly prepares students for their exams, including the board exams and competitive entrance exams.

Practice Test based on all Chapters of 11 Physics NCERT

• 11th Physics Chapter 1 Test 1
• 11th Physics Chapter 2 Test 1
• 11th Physics Chapter 2 Test 2
• 11th Physics Chapter 3 Test 1
• 11th Physics Chapter 4 Test 1
• 11th Physics Chapter 5 Test 1
• 11th Physics Chapter 5 Test 2
• 11th Physics Chapter 6 Test 1
• 11th Physics Chapter 6 Test 2
• 11th Physics Chapter 7 Test 1
• 11th Physics Chapter 7 Test 2
• 11th Physics Chapter 8 Test 1
• 11th Physics Chapter 8 Test 2
• 11th Physics Chapter 9 Test 1
• 11th Physics Chapter 10 Test 1
• 11th Physics Chapter 10 Test 2
• 11th Physics Chapter 11 Test 1
• 11th Physics Chapter 12 Test 1
• 11th Physics Chapter 13 Test 1
• 11th Physics Chapter 14 Test 1
• 11th Physics Chapter 15 Test 1
• 11th Physics Chapter 15 Test 2

Physics involves problem-solving and critical thinking. NCERT solutions include a variety of exercises that require students to apply concepts to solve problems. Practicing these problems hones their analytical and problem-solving skills. It often involves visual concepts, such as diagrams, graphs, and illustrations. NCERT solutions use these visual aids to explain concepts, making it easier for students to grasp abstract ideas.

Mechanics and properties of matter, Heat and thermodynamics, Sound or acoustics, Electricity and magnetism, Modern physics, Biophysics, Astrophysics, Geophysics, Nuclear physics , etc. Physics is based on mathematical equations and formulas. NCERT solutions break down these equations step by step, making it easier for students to understand how they are derived and applied.

1. Classical Mechanics: It explains the motion of particles which travel with velocities much less than that of light. 2. Theory of Relativity: It explains the in-variance in nature and also the motion of particles which travel with velocities close to that of light. 3. Thermodynamics: It is the theory of heat, temperature and conversion of heat into work and vice-versa. It also explains the behaviours of systems containing very large number of particles. NCERT solutions often include real-life examples that demonstrate the practical applications of physics concepts. This helps students relate theoretical concepts to the world around them.

4. Electromagnetism: It is theory of electricity, magnetism and the electromagnetic radiation including optics. 5. Quantum Mechanics: It explains the behaviours of atomic and subatomic systems of particles. According to Albert Einstein, Science is not just a collection of laws, a catalogue of unrelated facts. It is a creation of human mind with its freely invented ideas and concepts. About modern physics, he said, the reality created by modern physics is indeed, far removed from the reality of the early days. Many competitive entrance exams for engineering and other science-related fields include physics questions. Strong foundational knowledge gained from NCERT solutions can give students an advantage in such exams.

Class 1 Physics Chaperwise Revision Notes

• Class 11 Physics Chapter 1 Revision Questions
• Class 11 Physics Chapter 1 Revision Notes
• Class 11 Physics Chapter 2 Revision Notes
• Class 11 Physics Chapter 3 Revision Notes
• Class 11 Physics Chapter 4 Revision Notes
• Class 11 Physics Chapter 5 Revision Notes
• Class 11 Physics Chapter 6 Revision Notes
• Class 11 Physics Chapter 7 and 8 Revision Notes
• Class 11 Physics Chapter 9 Revision Notes
• Class 11 Physics Chapter 10 Revision Notes

The animate and ananimate – all objects are made up of matter and energy. Therefore, any type of study of an object is basically the study of some manifestation of matter and energy. The concepts learned in Class 11 Physics are built upon in Class 12 and higher education. Understanding Class 11 concepts thoroughly using NCERT solutions ensures a smooth transition to more advanced topics. The matter and energy is the subject of study of physics, hence the laws of physics are at work at the root of the all sciences. Therefore, it need not be surprising if some direct modification of the laws of physics appear to be underlying the human behaviour also. Due to these reasons physics has intimate relationship with all the sciences and hence it is called a fundamental science. Physics requires logical reasoning and critical analysis. By working through NCERT solutions, students develop logical thinking skills that are valuable in various academic and professional pursuits.

Class 11 Physics Chapterwise Assignments

• Physics Mathematical Tools
• 11 Physics Chapter 4 Assignment 1
• 11 Physics Chapter 7 Assignment 1
• 11 Physics Chapter 7 Assignment 2
• 11 Physics Chapter 7 Assignment 3
• 11 Physics Chapter 7 Assignment 4
• 11 Physics Chapter 7 Assignment 5
• 11 Physics Chapter 8 Assignment 1
• 11 Physics Chapter 8 Assignment 2
• 11 Physics Chapter 8 Assignment 3
• 11 Physics Chapter 8 Assignment 4
• 11 Physics Chapter 8 Assignment 5
• 11 Physics Chapter 9 Assignment 1
• 11 Physics Chapter 9 Assignment 2
• 11 Physics Chapter 10 Assignment 1
• 11 Physics Chapter 10 Assignment 2
• 11 Physics Chapter 10 Assignment 3
• 11 Physics Chapter 10 Assignment 4
• 11 Physics Chapter 10 Assignment 5
• 11 Physics Chapter 12 Assignment 1
• 11 Physics Chapter 12 Assignment 2
• 11 Physics Chapter 13 Assignment 1
• 11 Physics Chapter 13 Assignment 2
• 11 Physics Chapter 13 Assignment 3
• 11 Physics Chapter 14 and 15 Assignment 1
• 11 Physics Chapter 14 and 15 Assignment 2
• 11 Physics Chapter 14 and 15 Assignment 3
• 11 Physics Chapter 14 and 15 Assignment 4
• 11 Physics Chapter 14 and 15 Assignment 5

NCERT solutions are designed to be self-explanatory. This makes them a great resource for self-study, enabling students to learn and revise concepts independently. Ask your doubts related to NIOS or CBSE Board and share your knowledge with your friends and other users through Discussion Forum . Download NCERT Solutions and CBSE Offline Apps based on latest NCERT Books. Class 11 Physics covers a wide range of topics, including mechanics, thermodynamics, waves, and more. NCERT textbook solutions provide a comprehensive understanding of these topics, helping students build a holistic view of the subject.

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Assignments For Class 11 Physics

Assignments for Class 11 Physics have been developed for Standard 11 students based on the latest syllabus and textbooks applicable in CBSE, NCERT and KVS schools. Parents and students can download the full collection of class assignments for class 11 Physics from our website as we have provided all topic wise assignments free in PDF format which can be downloaded easily. Students are recommended to do these assignments daily by taking printouts and going through the questions and answers for Grade 11 Physics. You should try to do these test assignments on a daily basis so that you are able to understand the concepts and details of each chapter in your Physics book and get good marks in class 11 exams.

Assignments for Class 11 Physics as per CBSE NCERT pattern

All students studying in Grade 11 Physics should download the assignments provided here and use them for their daily routine practice. This will help them to get better grades in Physics exam for standard 11. We have made sure that all topics given in your textbook for Physics which is suggested in Class 11 have been covered ad we have made assignments and test papers for all topics which your teacher has been teaching in your class. All chapter wise assignments have been made by our teachers after full research of each important topic in the textbooks so that you have enough questions and their solutions to help them practice so that they are able to get full practice and understanding of all important topics. Our teachers at https://www.assignmentsbag.com have made sure that all test papers have been designed as per CBSE, NCERT and KVS syllabus and examination pattern. These question banks have been recommended in various schools and have supported many students to practice and further enhance their scores in school and have also assisted them to appear in other school level tests and examinations. Its easy to take print of thee assignments as all are available in PDF format.

Some advantages of Free Assignments for Class 11 Physics

• Solving Assignments for Physics Class 11 helps to further enhance understanding of the topics given in your text book which will help you to get better marks
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• You will be able to understand the type of questions which are expected in your Physics class test
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• NCERT Class 11 Physics Workbooks will surely help you to make your concepts stronger and better than anyone else in your class.
• Parents will be able to take print out of the assignments and give to their child easily.

All free Printable practice assignments are in PDF single lick download format and have been prepared by Class 11 Physics teachers after full study of all topics which have been given in each chapter so that the students are able to take complete benefit from the worksheets. The Chapter wise question bank and revision assignments can be accessed free and anywhere. Go ahead and click on the links above to download free CBSE Class 11 Physics Assignments PDF.

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You can get free PDF downloadable assignments for Grade 11 Physics from our website which has been developed by teachers after doing extensive research in each topic.

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Assignments Class 11 Physics Pdf Download

Students can refer to Assignments for Class 11 Physics available for download in Pdf. We have given below links to subject-wise free printable Assignments for Physics Class 11 which you can download easily. All assignments have a collection of questions and answers designed for all topics given in your latest NCERT Books for Class 11 Physics for the current academic session. All Assignments for Physics Grade 11 have been designed by expert faculty members and have been designed based on the type of questions asked in standard 11 class tests and exams. All Free printable Assignments for NCERT CBSE Class 11, practice worksheets, and question banks have been designed to help you understand all concepts properly. Practicing questions given in CBSE NCERT printable assignments for Class 11 with solutions and answers will help you to further improve your understanding. Our faculty have used the latest syllabus for Class 11. You can click on the links below to download all Pdf assignments for class 11 for free. You can get the best collection of Kendriya Vidyalaya Class 11 Physics assignments and questions workbooks below.

Class 11 Physics Assignments Pdf Download

CBSE NCERT KVS Assignments for Physics Class 11 have been provided below covering all chapters given in your CBSE NCERT books. We have provided below a good collection of assignments in Pdf for Physics standard 11th covering Class 11 questions and answers for Physics. These practice test papers and workbooks with question banks for Class 11 Physics Pdf Download and free CBSE Assignments for Class 11 are really beneficial for you and will support in preparing for class tests and exams. Standard 11th students can download in Pdf by clicking on the links below.

Subjectwise Assignments for Class 11 Physics

Benefits of Solving Class 11 Physics Assignments

• The best collection of Grade 11 assignments for Physics have been provided below which will help you in getting better marks in class tests and exams.
• The solved question for Class 11 Physics will help you to gain more confidence to attempt all types of problems in exams
• Latest NCERT Books for Class 11 Physics have been referred to for designing these assignments
• We have provided step by step solutions for all questions in the Class 11 assignments so that you can understand the solutions in detail.
• We have provided single click download links to all chapterwise worksheets and assignments in Pdf.
• Class 11 practice question banks will support to enhance subject knowledge and therefore help to get better marks in exam

FAQs by Physics Students in Class 11

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We provide here Standard 11 subject-wise assignments which can be easily downloaded in Pdf format for free. Our teachers have provided these Grade 11 Physics test sheets for Physics given in your books.

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We have provided the best quality question bank for Class 11 for Physics available for Pdf Download. You can download them all and use them offline without the internet.

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NCERT Solutions for Class 11 Physics Chapter 1 - Physical World

• NCERT Solutions

Physics can be a tough subject for many students hence, getting help from experts becomes essential while preparing for board exams. NCERT Solutions for Class 11 Physics Chapter 1 prepared by subject matter experts at Vedantu makes all the concepts appear very simple. The complex problems are broken down into simple steps so that students can grasp all the fundamentals involved in solving problems in the first chapter of Physics Class 11 NCERT.

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Physical World Chapter at a Glance - Class 11 NCERT Solutions

Physics deals with the study of the basic laws of nature and their manifestation in different phenomena. The basic laws of physics are universal and apply in widely different contexts and conditions.

The scope of physics is wide, covering a tremendous range of magnitude of physical quantities.

Physics and technology are related to each other. Sometimes technology gives rise to new physics; at other times physics generates new technology. Both have a direct impact on society.

There are four fundamental forces in nature that govern the diverse phenomena of the macroscopic world. These are the ‘gravitational force’, the ‘electromagnetic force’, the ‘strong nuclear force’, and the ‘weak nuclear force’. Unification of different forces/domains in nature is a basic quest in physics.

Below Table Shows Difference Between the Fundamental Forces

The physical quantities that remain unchanged in a process are called conserved quantities. Some of the general conservation laws in nature include the laws of conservation of mass, energy, linear momentum, angular momentum, charge, parity, etc. Some conservation laws are true for one fundamental force but not for the other.

Conservation laws have a deep connection with symmetries of nature. Symmetries of space and time, and other types of symmetry play a central role in modern theories of fundamental forces in nature.

Access NCERT Solutions for Physics Chapter 1 – Physical World

1. Some of the Most Profound Statements on the Nature of Science Have Come from Albert Einstein, One of the Greatest Scientists of All Time. What Do You Think Einstein Meant When He Said: “The Most Incomprehensible Thing About the World Is That it Is Comprehensible”?

Ans: Since the physical world around us appears to be full of different complex natural phenomena, the world is considered in-comprehensible. 

But with the help of study and observations one would find that all these phenomena are based on some basic physical laws and hence comprehensible. 

2. “Every Great Physical Theory Starts as a Heresy and Ends as a Dogma". Give Some Examples from the History of Science of the Validity of This Incisive Remark.

Ans: The above statement is true. 

Validity of this incisive remark can be validated with the help of the example of moment of inertia. 

It states that the moment of inertia of a body depends on its energy. 

However, according to Einstein's mass-energy relation, energy depends on the speed of the body.

3. Politics Is the Art of the Possible”. Similarly, "Science Is the Art of the Soluble”. Explain This Beautiful Aphorism on the Nature and Practice of Science.

Ans: We all know that to win over votes, politicians would make anything and everything possible even when they are least sure of the same. 

Similarly, in the case of science the various natural phenomena can be explained in terms of some basic laws. 

So as 'Politics is the art of possible', similarly 'Science is the art of the soluble'.

4. Though India Now Has a Large Base in Science and Technology, Which Is Fast Expanding, It Is Still a Long Way from Realizing Its Potential of Becoming a World Leader in Science. Name Some Important Factors, Which in Your View Have Hindered the Advancement of Science in India.

Ans: Some important factors in our view which hinder the advancement of science in India are:

1) Proper funds aren’t arranged for the development of research work and laboratories. The labs and scientific instruments are very old and outdated.

2) Most of the people in India are highly traditional and uneducated. So, they don't understand the importance of science.

3) Employment opportunities are also very low. 

4) Facilities for science education in schools and colleges in India are very poor. 

5. No Physicist Has Ever “Seen” an Electron. Yet, All Physicists Believe in the Existence of Electrons. An Intelligent but Superstitious Man Advances This Analogy to Argue That ‘Ghosts’ Exist Even Though No One Has ‘seen’ One. How Will You Refute His Argument?

Ans: No physicist has ever seen an atom, however there is practical evidence which proves the presence of electrons. 

Their size is so small that even powerful microscopes can’t measure their sizes but its effects could be tested. 

On the other hand, there is no such phenomena that could prove the existence of ghosts. 

Though our senses of sight and hearing are very limited to observe the existence of both, experimental evidence is enough proof for any scientist.

6. the Shells of Crabs Found Around a Particular Coastal Location in Japan Seem Mostly to Resemble the Legendary Face of a Samurai. Given Below Are Two Explanations of This Observed Fact. Which of These Strikes You as a Scientific Explanation?

a) A tragic sea accident several centuries ago drowned a young Samurai. As a tribute to his bravery, nature through its inscrutable ways immortalized his face by imprinting it on the crab shells in that area.

b) After the sea tragedy, fishermen in that area, in a gesture of honour to their dead hero, let free any crab shell caught by them which accidentally had a shape resembling the face of a Samurai. Consequently, the particular shape of the crab shell survived longer and therefore in course of time the shape was genetically propagated.

This is an example of evolution by artificial selection.

(Note: This interesting illustration taken from Carl Sagan’s ‘The Cosmos’ highlights the fact that often strange and inexplicable facts which on the first sight appear ‘supernatural’ actually turn out to have simple scientific explanations. Try to think of other examples of this kind).

Ans: Explanation (b) could be considered as a correct scientific explanation of the observed fact.

7. The Industrial Revolution in England and Western Europe More Than Two Centuries Ago Was Triggered by Some Key Scientific and Technological Advances. What Were These Advances?

More than two centuries ago, England and Western Europe made inventions like steam engines, electricity, theory of gravitation and explosives. 

Steam engines helped them in the field of heat and thermodynamics, theory of gravitation in the field of motion and making guns and cannons. 

These progresses lead to industrial revolution in England and Western Europe.

8. It Is Often Said That the World Is Now Witnessing a Second Industrial Revolution, Which Will Transform the Society as Radically as Did the First. List Some Key Contemporary Areas of Science and Technology, Which Are Responsible for This Revolution.

Ans: Some of the key contemporary areas of science and technology which may transform the society radically are the following:

1) The development of super-fast computers. 

2) Internet and tremendous advancement in information technology.

3) The development in Biotechnology

4) The development of superconducting materials at room temperature

5) The development of robots.

9. Write in About 1000 Words a Fiction Piece Based on Your Speculation on the Science and Technology of the Twenty-Second Century.

Ans: Imagine you are in a spaceship along with your friends which is moving towards Mars. The body of the spaceship is made of a specially designed matter which becomes harder as its temperature increases. The spaceship is using nuclear fuel and has three nuclear power plants in it. Two of them work alternatively and the third is kept for emergencies. The energy produced at these power plants is converted into electric energy which in turn runs the motors of the spaceship. 

Your team reaches safely on Mars, collects data, takes photographs and then returns back to the Earth. Unfortunately, on the return journey, the spaceship collides with an object in space and two of the power plants stop working as a result. Also, the third power plant’s efficiency is decreasing continuously due to overheating. 

You and your friends try to reduce the temperature of the power plant by flowing air in the plant and also try to repair the fuse of the other power plants. Finally, your team manages to repair the fuse of one of the powerplants. At last, you and your friends return safely back to Earth.

10. Attempt to Formulate Your ‘moral’ Views on the Practice of Science. Imagine Yourself Stumbling Upon a Discovery, Which Has Great Academic Interest but Is Certain to Have Nothing but Dangerous Consequences for Human Society. How, If at All, Will You Resolve Your Dilemma?

Ans: In our view a type of discovery which is of great academic interest but harmful for human society should not be made public because any advancement in the field of science is meant to improve the society, not to destroy it. 

11. Science, Like Any Knowledge, Can Be Put to Good or Bad Use, Depending on the User. Given Below Are Some of the Applications of Science. Formulate Your Views on Whether the Particular Application Is Good, Bad or Something That Cannot Be So Clearly Categorized:

a) Mass vaccination against smallpox to curb and finally eradicate this disease from the population. (This has already been successfully done in India).

Ans: Good. This was one of the major discoveries in the field of medical science and could save many lives.

b) Television for eradication of illiteracy and for mass communication of news and ideas.

Ans: Good. Without doubt television is a big boon as we could know what happens all across the world while relaxing on your couch. 

c) Prenatal sex determination.

Ans: Bad. Though it is great that we could know the sex of the baby before it comes out of the womb, female foeticide has shown an increase after this discovery. 

d) Computers for increase in work efficiency.

Ans: Good. Computers have in fact made the world a better place and life on it easier. 

e) Putting artificial satellites into orbits around the Earth.

Ans: Good. Artificial satellites with all its applications have made communication, etc great. 

f) Development of nuclear weapons.

Ans:  Bad. No good has come out of this discovery but loss of lives. 

g) Development of new and powerful techniques of chemical and biological warfare.

Ans: War is bad and so is this development.

h) Purification of water for drinking.

Ans: Good. Drinking pure water is must to avoid deadly diseases. 

i) Plastic surgery

Ans: Good. This could fix innate disfigurement and those caused due to accidents. However, those who could afford this surgery also use it to change features that would make them meet the beauty standards. 

Ans: Good. This could help farmers, etc, to increase the production of that crop or animal showing preferred traits. 

12. India Has Had a Long and Unbroken Tradition of Great Scholarship - in Mathematics, Astronomy, Linguistics, Logic and Ethics. Yet, in Parallel With This, Several Superstitious and Obscurantist Attitudes and Practices Flourished in Our Society and Unfortunately Continue Even Today - Among Many Educated People Too. How Will You Use Your Knowledge of Science to Develop Strategies to Counter These Attitudes?

Ans: Poverty and illiteracy are the two major factors which make people superstitious and hence affect the quality of education in India. 

In order to remove the superstitious and obscurantist attitude we have to first fix these factors. 

Everybody should be educated, so that everyone can have a scientific perspective. Scientific knowledge can prove people's superstitions wrong by showing them the scientific logic behind everything happening around the world.

13. Though the Law Gives Women Equal Status in India, Many People Hold Unscientific Views on a Woman’s Innate Nature, Capacity and Intelligence, and in Practice Give Them a Secondary Status and Role. Demolish This View Using Scientific Arguments, and by Quoting Examples of Great Women in Science and Other Spheres; and Persuade Yourself and Others That, Given Equal Opportunity, Women Are on Par With Men.

Ans: Some people in our society believe that women do not have the innate nature, capacity and intelligence. 

To demolish this belief, we could cite the examples of women who have proven their abilities in science and other fields. For example, Madam Curie, Mother Teresa, Indira Gandhi, Margaret Thatcher, Rani Laxmi Bai, Florence Nightingale, etc. 

Hence, we could say that, in this era, women are definitely not behind men in any field.

14. “It Is More Important to Have Beauty in the Equations of Physics Than to Have Them Agree With Experiments”. the Great British Physicist P. A. M. Dirac Held This View. Criticize This Statement. Look Out for Some Equations and Results in This Book Which Strike You as Beautiful.

Ans: An equation which agrees with experiment must also be simple and hence beautiful. Following are some simple and beautiful equations in Physics:

1) Energy of light, $E=m{{c}^{2}}$

2) Energy of a photon, $E=h\nu$ 

3) Kinetic energy of a moving particle, $K.E=\frac{1}{2}m{{v}^{2}}$

4) Potential energy of a body at rest, $P.E=mgh$

5) Work done, $W=F.d$

It is interesting that all the above equations have the same dimension.  

One experiment shows dependency of energy on speed, the other shows dependency on frequency & displacement and that's the beauty of equations in Physics coming from different experiments.

15. Though the Statement Quoted Above May Be Disputed, Most Physicists Do Have a Feeling That the Great Laws of Physics Are at Once Simple and Beautiful. Some of the Notable Physicists, Besides Dirac, Who Have Articulated This Feeling, Are: Einstein, Bohr, Heisenberg, Chandrasekhar and Feynman. You Are Urged to Make Special Efforts to Get Access to the General Books and Writings by These and Other Great Masters of Physics. (see the Bibliography at the End of This Book.) Their Writings Are Truly Inspiring!

Ans: It is extremely true that great laws of physics are simple and beautiful. Few of the examples are given below.

a) Einstein's mass-energy equivalence relation $E=m{{c}^{2}}$ is simple and beautiful.

b) According to Max Planck's quantum, the energy of a photon is $E=h\nu $, is also a simple and beautiful equation.

c) The De-Broglie wavelength associated with a particle of mass m is given by $\lambda =\frac{h}{mv}$. It is also a simple and beautiful equation.

16. Textbooks on Science May Give You a Wrong Impression That Studying Science Is Dry and All Too Serious and That Scientists Are Absent-Minded Introverts Who Never Laugh or Grin. This Image of Science and Scientists Is Patently False. Scientists, Like Any Other Group of Humans, Have Their Share of Humorists, and Many Have Led Their Lives With a Great Sense of Fun and Adventure, Even as They Seriously Pursued Their Scientific Work. Two Great Physicists of This Genre Are Gamow and Feynman. You Will Enjoy Reading Their Books Listed in the Bibliography.

Ans: It is very true that scientists like any other group of humans have their share of humorists. 

Two great physicists of this genre are Gamow and Feynman. We could also add a few other scientists to this list: CV Raman, Einstein, Bohr, former Indian president. APJ Abdul Kalam, etc.

NCERT Solutions for Class 11 Physics – Free PDF Download

The teachers at Vedantu have prepared these solutions after extensive research, and they are in line with the CBSE curriculum hence very beneficial from the exam point of view. If students get stuck during going through Chapter 1 of Physics Class 11, they can always get in touch with the solution providers to clarify every doubt.

The entire NCERT Solutions Physics Class 11 Chapter 1 PDF is now available at Vedantu and can be downloaded online from anywhere. Students can refer to these solutions for a quick revision. By going through these solutions, you can easily comprehend and can do similar sums independently.

NCERT Solutions for Class 11 Physics Chapter 1 – Physical World

Introduction.

In NCERT Physics Class 11 Part 1, you will learn about the fundamentals of the physical world. Students would learn how the word science has come from the Latin verb “Scientia” which means “to know”. It briefly discusses how science progressed from countries like India, Egypt, China, Greece, etc. It was in the middle of the twentieth century that learning science became popular, and many efforts to learn about it had started in a big way. Students would learn that science is a systematic way of understanding what happens in the nature around us in much more detail and depth. Students would understand how many experiments, systematic observation, etc. contribute to learning about the world.

In particular, students would learn about two principal thrusts in Physics:

Unification – The quest for unification is to unify fundamental forces of nature. Like gravity makes things fall on the ground and also causes the motion of the moon around the earth.

Reduction – This concept is at the heart of Physics, where properties of simpler parts are used to derive properties of a bigger and more complex system.

Scope and Excitement of Physics

In this section of the Physics Class 11 chapter, 1 various subdiscipline of Physics are discussed. Students will learn here about:

Macroscopic Domain – This deals with phenomena at the terrestrial, laboratory, and astronomical scales.

Microscopic Domain – This domain includes molecular, atomic, and nuclear phenomena.

Physics Technology and Society

In this part of the ch 1 Physics Class 11 students would learn how Physics, technology, and society are interrelated. Students would be acquainted with how thermodynamics came into existence due to the need to understand and improve the working of heat engines. Likewise, the steam engine had a great impact on human life. The basic law of electricity and magnetism gave rise to wireless communication. In this section of the Class 11th Physics chapter students will get to know the names of many famous physicists along with their country of origin and their greatest contribution to Physics and society.

Fundamental Forces in Nature

Students would get to know about what force is and various forms of force. Force is used in everyday life to push, carry, or break things. The gravitational force pulls objects to the ground. Apart from these, many other common forces exist in nature like:

Muscular force.

Contact forces between bodies.

The friction which is a form of the contact force that is parallel to the surfaces which are in contact.

Electromagnetic Forces – Force between charged particles.

Strong Nuclear Forces – Force that binds protons and neutrons in a nucleus.

Weak Nuclear Forces – These appear in a few nuclear processes like the β−decay of the nucleus.

Students are presented with a table where different types of technology like radio, laser, etc. are listed along with the scientific principles that they are based on. Students will also learn about life and works of famous scientists like Albert Einstein and Satyendra Nath Bose in this portion of Class 11 Physics NCERT solutions Chapter 1.

Nature of Physical Laws

In this part of 11th Class Physics 1st chapter, students will be taught about how any physical phenomenon causes a change in many quantities with time. They would also learn that certain physical quantities remain unchanged despite the natural forces. Students would understand the conservation principles and that the total mechanical energy of a body remains constant. It is termed as the unification process, and students are presented with a table where famous scientists and their achievements in the unification field are illustrated. The life and work of scientist C.V. Raman with regards to conservation laws are also discussed here.

Exercise 1.1

The solutions of Class 11 Physics Chapter 1 Exercise 1.1 are prepared based on all these natural laws discussed. The solution explains the concept in detail in a step by step manner. These are thought-provoking questions that need a deeper understanding of the chapter, and the team at Vedantu can give you more insight into it.

Key Features of NCERT Solutions for Class Physics Chapter 1

Getting a good grasp on Physics needs you to have solutions prepared by teachers who know the pain points of students. This is what our experts at Vedantu possess due to their vast experience in this subject. They not only provide solutions but also make students adept in solving any kind of sum related to a particular topic, on their own.

The key features of these solutions are:

It is a quick and easy way to recall all that you have learned in the chapter.

The solutions are geared towards CBSE exams; hence students get a good preparation of how exam scenarios would be.

• There are many tips and tricks taught, which will help students memorize all the important formulas efficiently.

Important Concepts Covered in NCERT Solutions for Class 11 Physics Chapter 1

The important concepts discussed in this chapter are listed below:

Physical World

What is Physics

Physics, Technology, and Society

Gravitational Force

Electromagnetic Force

Strong Nuclear Force

Weak Nuclear Force

Towards Unification of Forces

FAQs on NCERT Solutions for Class 11 Physics Chapter 1 - Physical World

1. List Some of the Scientists and Their Major Contributions to Science.

Ans: Some of the scientists and their greatest contributions are listed in the table below:

2. Can Everything be Proved with the Help of Physics and Mathematics?

Ans: One should not think that all concepts can be proved with the help of Physics or mathematics. Science depends on some assumptions, which are called hypotheses, axioms, postulates, etc. A hypothesis is a supposition that does not assume it to be true. For instance, the universal law of gravitation is not something that can be proved. It can only be substantiated with experiments and observations.

3. What is the Physical World in Physics according to the Class 11 syllabus?

Ans: The first chapter in the syllabus for Class 11 Physics is called Physical World. The chapter involves topics such as the fundamental laws and principles of Science, Natural Sciences, Mathematics, and Physics. It focuses on the impact, forces, and uses of these subjects. Students will get a solid understanding of the development of various laws of Physics. All of these topics are important to grasp the basic concepts.

4. Is the Physical World important for NEET?

Ans: The chapter “Physical World” holds less importance than other chapters when one talks of NEET. It is observed that in the previous year’s question papers, not more than one or two questions are asked from this chapter. The syllabus of NEET 2024 is reduced, so the chances of this chapter’s questions are reduced. However, students should not wholly avoid studying it.

5. Is Class 11 Physics difficult?

Ans: For many students, Physics in class 11 is considered the most challenging subject if compared to Maths, Chemistry, and Biology. Students often find it hard to score well in Physics until they practice regularly and thoroughly understand all the topics and concepts. Understanding the fundamental concepts behind various equations instead of simply memorising them can help students score better in exams. To access the NCERT Solutions Class 11 Physics Chapter 1 Physical World, students can visit the official website of Vedantu .

6. What is a physical unit Class 11?

Ans: “Physical units” is one of the concepts from the second chapter of Class 11 Physics. The chapter is Units and Measurements. Physical units refer to the various standard units that are used to measure physical quantities. For example, kilogram, gram, and litre are all physical units that are used to measure the physical amount of various solid or liquid items. The concept of physical units is taught to introduce the measurement and comparison of any physical quantity.

7. Are NCERT Solutions important for Class 11 Physics?

Ans: Referring to NCERT Solutions is important while preparing for your Class 11 Physics exams. Reading the questions provided in the NCERT is not going to be helpful if students cannot answer them correctly. NCERT Solutions for Class 11 Physics is available on Vedantu. Vedantu provides correct and step-by-step solutions for all NCERT questions. These solutions are also available on Vedantu’s App. All the resources are available free of cost.

NCERT Solutions for Class 11 Physics

Assignment for Class 11 Physics

Download free PDF assignment for CBSE NCERT Class 11 Physics with chapter-wise and topic-wise important Numerical Questions and MCQs based on the latest syllabus and textbooks of CBSE NCERT. These assignments are designed for helping students to understand various topics, practice skills and improve their subject knowledge which in turn helps students to improve their academic performance.

Assignment for Class 11 free PDF Download

We have proved large number of Assignments for Numerical Questions and MCQs of every chapter for class 11 Physics. By Practicing these assignments will help you in concept clarification and enhance your problem solving skill. These question will help in subjective and well as objective approach of solving questions as latest pattern of CBSE includes Theory based as well as MCQ based questions.

Advantages of CBSE Class 11 Physics Worksheets

• By practising  NCERT CBSE  Class 11 Physics  Worksheet , students can improve their problem solving skills.
• Helps to develop the subject knowledge in a simple, fun and interactive way.
• No need for tuition or attend extra classes if students practise on worksheets daily.
• Working on CBSE worksheets are time-saving.
• Helps students to promote hands-on learning.
• One of the helpful resources used in classroom revision.
• CBSE Class 11 Physics Workbook  Helps to improve subject-knowledge.
• CBSE Class 11 Physics Worksheets encourages classroom activities.

Assignment Class 8 Science

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Assignment Class 11 Physics

Assignment Class 11 Chemistry

Assignment Class 11 Biology

Assignment Class 12 Physics

Assignment Class 12 Chemistry

Assignment Class 12 Biology

Mathematics Assignments

Assignment Class 8 Math

Assignment Class 9 Math

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Assignment Class 12 Math

MCQs and Objective Type Questions as per CBSE Pattern

CHAPTER 1: UNIT AND MEASUREMENTS

• Chapter 1 Unit and Measurement Assignment for class 11 Physics  -Numerical Question
• Chapter 1 Unit and Measurements Assignment for Class 11 Physics -MCQ Set A
• Chapter 1 Unit and Measurements Assignment for Class 11 Physics -MCQ Set B
• Chapter 1 Unit and Measurements Assignment for Class 11 Physics -MCQ Set C
• Chapter 1 Unit and Measurements Assignment for Class 11 Physics -MCQ Set D

CHAPTER 2: MOTION IN A STRAIGHT LINE

• Chapter 2 Motion in a Straight Line Assignment for class 11 Physics  -MCQ Set A
• Assignment Solutions
• Chapter 2 Motion in a Straight Line Assignment for class 11 Physics  -MCQ Set B
• Chapter 2 Motion in a Straight Line Assignment for class 11 Physics  -MCQ Set C
• Chapter 2 Motion in a Straight Line Assignment for class 11 Physics  -MCQ Set D
• Chapter 2 Motion in a Straight Line Assignment for class 11 Physics  -MCQ Set E

CHAPTER 3: MOTION IN A PLANE

• Assignment for Physics Class 11 Motion in a Plane MCQ Set A
• Assignment for Physics Class 11 Motion in a Plane MCQ Set B
• Assignment for Physics Class 11 Motion in a Plane MCQ Set C

CHAPTER 5: LAWS OF MOTION

• Assignment for Physics Class 11 Laws of Motion MCQ Set A
• Assignment for Physics Class 11 Laws of Motion MCQ Set B
• Assignment for Physics Class 11 Laws of Motion MCQ Set C

 Short, Long Answer Type Questions and Numerical Questions as per CBSE NCERT Pattern

1.Unit and Measurements

Numerical Questions for Unit and Measurements

2. Motion in One Dimension

Numerical Questions for Motion in One Dimension

3. Motion in a Plane

Numerical Questions for Vector

Numerical Questions for Projectile Motion

4. Laws Of Motion

Numerical Questions for Conservation Of Momentum

Numerical Questions for Friction

Numerical Questions for Laws Of Motion 1

Numerical Questions for Laws Of Motion 2

Numerical Question for Circular Motion

5. Work, Energy and Power

Numerical Question for W ork, Energy and Power

6. Rotational Motion

Numerical Questions for Rotational Motion

CHAPTER 6: WORK, ENERGY AND ENERGY

• Assignment of Physics Class 11 Work, Energy and Power MCQ Set A
• Assignment of Physics Class 11 Work, Energy and Power MCQ Set B
• Assignment of Physics Class 11 Work, Energy and Power MCQ Set C

CHAPTER 7: SYSTEM OF PARTICLES AND ROTATIONAL MOTION

• Assignment of Physics Class 11 System of Particles and Rotational Motion MCQ Set A
• Assignment of Physics Class 11 System of Particles and Rotational Motion MCQ Set B
• Assignment of Physics Class 11 System of Particles and Rotational Motion MCQ Set C

CHAPTER 8: GRAVITATION

• Assignment of Physics Class 11 Gravitation MCQ Set A
• Assignment of Physics Class 11 Gravitation MCQ Set B
• Assignment of Physics Class 11 Gravitation MCQ Set C

CHAPTER 9: MECHANICAL PROPERTIES OF SOLIDS

• Assignment of Physics Class 11 Mechanical Properties of Solids MCQ Set A
• Assignment of Physics Class 11 Mechanical Properties of Solids MCQ Set B
• Assignment of Physics Class 11 Mechanical Properties of Solids MCQ Set C

CHAPTER 10: MECHANICAL PROPERTIES OF FLUIDS

• Assignment of Physics Class 11 Mechanical Properties of Fluids MCQ Set A
• Assignment of Physics Class 11 Mechanical Properties of Fluids MCQ Set B
• Assignment of Physics Class 11 Mechanical Properties of Fluids MCQ Set C

CHAPTER 11: THERMAL PROPERTIES OF MATTER

• Assignment of Physics Class 11 Thermal Properties of Matter MCQ Set A
• Assignment of Physics Class 11 Thermal Properties of Matter MCQ Set B
• Assignment of Physics Class 11 Thermal Properties of Matter MCQ Set C

CHAPTER 12: THERMODYNAMICS

• Assignment of Class 11 Physics Thermodynamics MCQ Set A
• Assignment of Class 11 Physics Thermodynamics MCQ Set B
• Assignment of Class 11 Physics Thermodynamics MCQ Set C

CHAPTER 13: KINETIC THEORY

• Assignment of Class 11 Physics Kinetic Theory MCQ Set A
• Assignment of Class 11 Physics Kinetic Theory MCQ Set B
• Assignment of Class 11 Physics Kinetic Theory MCQ Set C

CHAPTER 14: OSCILLATIONS

• Assignment of Physics Class 11 Oscillations MCQ Set A
• Assignment of Physics Class 11 Oscillations MCQ Set B
• Assignment of Physics Class 11 Oscillations MCQ Set C

CHAPTER 15: WAVES

• Assignment of Physics Class 11 Waves MCQ Set A
• Assignment of Physics Class 11 Waves MCQ Set B
• Assignment of Physics Class 11 Waves MCQ Set C

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NCERT Solutions for Class 11 Physics Chapter 1 Physical World

Ncert solutions class 11 physics chapter 1 physical world – free pdf download.

*According to the latest update on the CBSE Syllabus 2023-24, this chapter has been removed.

NCERT Solutions Class 11 Physics Chapter 1 Physical World is the most effective tool to practise Physics for the 11 th standard examination. The NCERT Solutions for Class 11 Physics will help students to get familiar with the exam pattern and the syllabus of Chapter 1, Physical World. Before understanding more complex theories in Physics, we will be going through the matters and materials around the world where the laws of physics are being applied by nature.

Physics consists of both concepts and problems as per the latest update of the CBSE Syllabus 2023-24. In order to score well in the exam, students are highly recommended to use the NCERT Solutions while answering the questions from the textbook. The chapter-wise solutions are provided here in a PDF format which can be downloaded by the students free of cost.

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Access Answers of NCERT Solutions for Class 11 Physics Chapter 1 Physical World

1.1 Some of the most profound statements on the nature of science have come from Albert Einstein, one of the greatest scientists of all time. What do you think did Einstein mean when he said: “The most incomprehensible thing about the world is that it is comprehensible”?

The complex physical world involves different orders of magnitudes in space, time and mass. Despite this, nearly all physical phenomena can be expressed in terms of a few basic laws. By this view, Einstein’s statement, “The most incomprehensible thing about the world is that it is comprehensible”, becomes very clear.

1.2 “Every great physical theory starts as a heresy and ends as a dogma.” Give some examples from the history of the science of the validity of this incisive remark.

Ans: One of the general observations in our daily life is that light travels in a straight line. When Huygens propounded his wave theory, it was a heresy. However, soon it became dogma as interference patterns, refraction, etc., could be successfully explained on the basis of wave theory. It was believed that light was only energy, but when the photoelectric effect was discovered, it was proposed that light had a particle nature, too; this was greatly debated and treated as heresy. However, Einstein finally proved it with his quantum theory of light. Henceforth, it has been treated as a dogma.

1.3 “Politics is the art of the possible.” Similarly, “Science is the art of the soluble.” Explain this beautiful aphorism on the nature and practice of science

Politicians make anything and everything possible to win votes. Science is a systematic study of observation. Scientists and researchers study these observations and then work out certain laws from them. There is a multitude of natural phenomena taking place in this universe, and all of them can be explained in terms of some basic laws. For e.g., F = mg is true for you and me and also for a star. Thus, in science, we see that various phenomena are related, and they are soluble and can be explained with similar or the same law. This goes on to justify that science is the art of the soluble, just as politics is the art of the possible.

1.4 Though India now has a large base in science and technology, which is fast expanding, it is still a long way from realising its potential of becoming a world leader in science. Name some important factors, which in your view, have hindered the advancement of science in India.

Ans: Here are some important factors that have obstructed the growth of science in India:

• Lack of infrastructure and funds for quality research work in science.
• Poor pay scales and other facilities for scientists as compared to administrators.
• Science education is neither properly oriented nor directed. It needs specific directions depending on our requirements. Industrialists are the actual consumers of new technology and research. The industrialists of this country have little confidence in the ability of Indian scientists. There is practically no coordination between the researchers and the industrialists.
• Rural-based science education is nearly non-existent, so the majority of the population is deprived of the benefits of advancements in technology and science.

1.5 No physicist has ever “seen” an electron. Yet, all physicists believe in the existence of electrons. An intelligent but superstitious man advances this analogy to argue that ‘ghosts’ exist even though no one has ‘seen’ one. How will you refute his argument?

Even though an electron has never been ‘seen’, its effects have been observed, and its practical evidence has been tested and proved, for e.g., electricity. However, regarding spirits and ghosts, even though there are many claims and sightings, standardised scientific reading and evidence have never been observed or successfully tested. Thus, we really cannot state with a cent per cent surety that they exist. 1.6 The shells of crabs found around a particular coastal location in Japan seem mostly to resemble the legendary face of a Samurai. Given below are two explanations of this observed fact. Which of these strikes you as a scientific explanation? (a) A tragic sea accident several centuries ago drowned a young Samurai. As a tribute to his bravery, nature, through its inscrutable ways, immortalised his face by imprinting it on the crab shells in that area.

(b) After the sea tragedy, fishermen in that area, in a gesture of honour to their dead hero, set free any crab shell caught by them that accidentally had a shape resembling the face of a Samurai. Consequently, the particular shape of the crab shell survived longer and therefore, in the course of time, the shape was genetically propagated. This is an example of evolution by artificial selection. [Note: This interesting illustration is taken from Carl Sagan’s ‘The Cosmos’ and highlights the fact that often strange and inexplicable facts that at first sight appear ‘supernatural’ actually turn out to have simple scientific explanations. Try to think of other examples of this kind].

(a) More logical and scientific.

1.7 The industrial revolution in England and Western Europe more than two centuries ago was triggered by some key scientific and technological advances. What were these advances?

The rise of modern science and the industrial revolution are closely connected to each other. The other profound impact effect that Science had on the development of modern science is that the application of Science to solve industrial problems garnered public support and interest in Science.

Some of the key discoveries and their uses are listed below:

• The application of thermodynamics and heat to form the steam engine are some of the key advances in Science and technology during the period of the industrial revolution.
• The implementation and discovery of electricity helped in the invention of motors and dynamos. Likewise, the study of gravitation led to the study of motion, which further led to the development of cannons and guns. This invention gave power to the hands of western countries, and they ruled over the rest of the world.
• The discovery of explosives not only helped the army but also helped in mineral exploration.

These were a few examples of scientific breakthroughs that helped England and Europe to have their prominent positions in the world.

1.8 It is often said that the world is now witnessing a second industrial revolution, which will transform society as radically as the first. List some key contemporary areas of science and technology which are responsible for this revolution.

Some key contemporary areas of technology and Science, which are chiefly responsible for a new industrial revolution taking place now and likely to take place in the near future, are

• Artificial intelligence
• Design of super-fast computers
• Biotechnology
• Development of superconducting materials at room temperature
• Advancements in the field of

→ Electronics

→ Information technology

→ Nanotechnology

→ Developments in the field of Space Sciences

1.9 Write in about 1000 words a fiction piece based on your speculation on the Science and technology of the twenty-second century.

Ans: In the 22 nd century, humans will be able to create wormholes allowing people to travel to distant places in the universe. We will be in contact with aliens and have established human settlements outside the earth as well. With advancements in quantum Physics, we shall be more aware and understanding of the true nature of our universe and existence. Our technology will not pollute and degrade the earth. Artificial intelligence and humans could have some clashes.

1.10 Attempt to formulate your ‘moral’ views on the practice of Science. Imagine yourself stumbling upon a discovery which has great academic interest but is certain to have nothing but dangerous consequences for human society. How, if at all, will you resolve your dilemma?

Ans: A scientist works for the truth. Every scientific discovery reveals a certain truth about nature. So, any discovery, bad or good for humankind, must be made public. But with that being said, we cannot afford to be blind to the consequences. Before disclosing it, we must ascertain the degree of good or bad consequences it will have. If we know that a certain discovery has nothing but dangerous consequences to offer to the mass, the discovery is best kept limited only to the knowledge of the scientist and researchers working on it. This way, the discovery can help societies in the long run without completely destroying them now.

1.11 Science, like any knowledge, can be put to good or bad use, depending on the user. Given below are some of the applications of science. Formulate your views on whether the particular application is good, bad or something that cannot be so clearly categorised.

(a) Mass vaccination against smallpox to curb and finally eradicate this disease from the population. (This has already been successfully done in India.) (b) Television for the eradication of illiteracy and mass communication of news and ideas. (c) Prenatal sex determination. (d) Computers for the increase in work efficiency. (e) Putting artificial satellites into orbits around the Earth. (f ) Development of nuclear weapons. (g) Development of new and powerful techniques of chemical and biological warfare. (h) Purification of water for drinking. (i) Plastic surgery (j ) Cloning

(a)  Good. Mass vaccination helped eradicate the dreaded diseases from the Earth.

(b) Good. Television helps in the literacy campaign and is an effective method of mass communication and entertainment.

(c) Bad. Prenatal sex determination is considered bad because it gives rise to the practice of abortion in the case of the female foetus.

(d) Good. Computer increases work efficiency.

 (e)  Good. Artificial satellites help in the worldwide communication process.

(f) Bad. Nuclear weapons, if misused, may cause the mass destruction of humankind.

(g) Bad. These techniques may be misused for destructive purposes.

(h) Good. Purified water improves the health of people.

(i) Neither good nor bad. Plastic surgery is something which can’t be classified as either good or bad because it helps to remove a certain types of deformations in needy persons.

(j) Bad. Cloning has the potential to ruin the normal family life of human society.

1.12 India has had a long and unbroken tradition of great scholarship — in mathematics, astronomy, linguistics, logic and ethics. Yet, in parallel with this, several superstitious and obscurantist attitudes and practices flourished in our society and unfortunately continue even today — among many educated people too. How will you use your knowledge of science to develop strategies to counter these attitudes?

In order to popularise scientific explanations of everyday phenomena, mass media like

→ Newspapers

→ Television

should be used. Knowledge of science should be educated to the masses so that they learn about the real causes of phenomena, allowing their superstitious beliefs to wash away.

1.13 Though the law gives women equal status in India, many people hold unscientific views on a woman’s innate nature, capacity and intelligence, and in practice, give them a secondary status and role. Demolish this view using scientific arguments and by quoting examples of great women in science and other spheres, and persuade yourself and others that, given equal opportunity, women are on par with men.

No difference is noticed in the ability of women and men as far as work, intelligence, decision making is concerned. Nature makes little difference in the anatomy and feeling of men and women. The nutrition content of prenatal and postnatal diets contributes a lot towards the development of the human body. If equal opportunities are provided to both women and men, then the female mind and body will be just as efficient as a man’s. The list of great women who have excelled in their respective fields is enormous. Names of

→ Madame Curie

→ Indira Gandhi

→ Florence Nightingale

→ Margaret Thatcher

→ Mother Teresa

→ Sarojini Naidu

→ Kalpana Chawla

been taken from fields varying from Sociology to Science, and they are very well-known for their contribution to the world.  Reflecting on the contribution being made to each and every sphere of life in the country, it can be positively debated that women are no less essential to society than men.

1.14 “It is more important to have beauty in the equations of Physics than to have them agree with experiments”. The great British physicist P. A. M. Dirac held this view. Criticise this statement. Look out for some equations and results in this book which strike you as beautiful.

Dirac’s belief holds true. Equations which represent entire concepts and hold up against experimental results are automatically simple, small and symmetrical, making them truly beautiful. Some examples of beautiful equations are: E = mc 2 , E = hv, F = mg, P.E = mgh

NCERT Solutions for Class 11 Physics Chapter 1

NCERT Solutions provided here present students with answers to the textbook questions, along with extra questions, NCERT Exemplar problems with solutions, worksheets, MCQs and short answer questions. Solving these questions will help them to prepare notes and to understand the concept thoroughly.

We will see here how things work and the reasons behind their workings. As Einstein once said, “Imagination is more important than knowledge,” this chapter will make students aware of the things that surround them, the history of science and its origin. We will also see many aphorisms below and reasons to justify them with real-life Physics concepts. We will be relating ourselves to the theories and observations done by many scientists and deriving conclusions from them.

We will be getting acquainted with the factors responsible for the growth of Science and technology in India. The existence of an electron has been discussed in this chapter, along with the scientific resemblance of a crab species with that of a Japanese samurai. We will be glancing at the history of the industrial revolution in Western Europe and England, which was two centuries ago. Besides, we will be seeing the significant areas of science and technology responsible for the current revolution.

We will also be writing a fictional article about the speculation of Science and technology in the 22nd century. Moreover, we will work on moralising our views on science and the consequences of practising Science. We will ask students to give their opinions about certain applications and processes of Science, whether it was helpful or not for the betterment of human civilisation. We will be focusing on the history of India and the superstitious practices and attitudes followed by Indians. Students can check out NCERT Solutions for Class 11 for more chapter-wise solutions of Physics.

Furthermore, we will be talking about the law behind people having irrational ideas about women’s intelligence, capacity and nature and about giving them a status along with the role of technology in the development of society. We will let students express their judgements on the statement provided by Physicist P.A.M. Dirac, and we will also be knowing some beautiful equations of Physics. We have heard about the adventures of scientists and many more outgoing individuals who have climbed tall mountains to record temperatures and even dive deep to collect data regarding flora and fauna. Below, we will see various questions on the above-mentioned topics.

The NCERT Solutions for Class 11 Physics Chapter 1 are prepared by expert subject teachers in such a way that it covers all the concepts of the topic. Check the NCERT Solutions for Class 11 Physics Chapter 1 PDF.

BYJU’S brings students NCERT study materials, notes, previous years’ question papers, Physics problems and sample papers. These study materials are prepared as per the latest CBSE Syllabus 2023-24. For more information, register with BYJU’S or download BYJU’S – The Learning App for a personalised learning experience.

Important Concepts of NCERT Solutions for Class 11 Physics Chapter 1

Students who are not able to answer the questions from the textbook are advised to refer to the NCERT Solutions for Class 11 Physics from BYJU’S. A highly experienced faculty creates the solutions in accordance with the latest CBSE Syllabus 2023-24 and its guidelines. Some of the important concepts covered in Chapter 1 are

1.1 WHAT IS PHYSICS?

1.2 SCOPE AND EXCITEMENT OF PHYSICS

1.3 PHYSICS, TECHNOLOGY AND SOCIETY

1.4 FUNDAMENTAL FORCES IN NATURE

1.4.1 Gravitational Force

1.4.2 Electromagnetic Force

1.4.3 Strong Nuclear Force

1.4.4 Weak Nuclear Force

1.4.5 Towards Unification of Forces

1.5 NATURE OF PHYSICAL LAWS

Disclaimer – 

Dropped Topics – 

1.1 What Is Physics? 1.2 Scope and Excitement of Physics 1.3 Physics, Technology and Society 1.4 Fundamental Forces in Nature 1.5 Nature of Physical Laws

Frequently Asked Questions on NCERT Solutions for Class 11 Physics Chapter 1

How do ncert solutions of class 11 physics chapter 1 physical world help in the exam preparation, is byju’s providing answers for ncert solutions for class 11 physics chapter 1, list out the important concepts discussed in ncert solutions for class 11 physics chapter 1..

The main concepts covered in NCERT Solutions for Class 11 Physics Chapter 1 are we will be going through the matters and materials around the world where the laws of Physics are being applied by nature.

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Unit 9: Laws of motion

About this unit.

Let's learn about what a force is and how Newton changed the world's view of how reality works.

Introduction to forces and free body diagrams

• Types of forces and free body diagrams (Opens a modal)
• Introduction to forces and free body diagrams review (Opens a modal)
• Introduction to free body diagrams 4 questions Practice

Newton's first law: Mass and inertia

• Newton's first law of motion introduction (Opens a modal)
• Applying Newton's first law of motion (Opens a modal)
• What is Newton's first law? (Opens a modal)
• What is weight? (Opens a modal)
• Newton's first law review (Opens a modal)
• Net force and acceleration exercise 4 questions Practice
• Analyzing motion using Newton's laws 4 questions Practice

Newton's second law

• Newton's second law of motion (Opens a modal)
• More on Newton's second law (Opens a modal)
• Newton's second law review (Opens a modal)
• Systems and Objects (Opens a modal)
• Newton's second law: Solving for force, mass, and acceleration 4 questions Practice
• Forces and motion 4 questions Practice
• Systems 4 questions Practice

Newton's third law

• Newton's third law of motion (Opens a modal)
• More on Newton's third law (Opens a modal)
• Newton's third law review (Opens a modal)
• Identifying equal and opposite forces 4 questions Practice
• Newton's third law of motion 7 questions Practice

Normal force and contact force

• Normal force and contact force (Opens a modal)
• Normal force in an elevator (Opens a modal)
• Breaking down forces for free body diagrams (Opens a modal)
• Free body diagram with angled forces: worked example (Opens a modal)
• Angled forces review (Opens a modal)
• More on Normal force (shoe on floor) (Opens a modal)
• More on Normal force (shoe on wall) (Opens a modal)
• What is normal force? (Opens a modal)
• Normal force (basic) 4 questions Practice
• Forces at an angle 4 questions Practice

Balanced and unbalanced forces

• Balanced and unbalanced forces (Opens a modal)
• Unbalanced forces and motion (Opens a modal)

Slow sock on Lubricon VI

• Slow sock on Lubricon VI (Opens a modal)
• Normal forces on Lubricon VI (Opens a modal)

Inclined planes

• Inclined plane force components (Opens a modal)
• Ice accelerating down an incline (Opens a modal)
• What are inclines? (Opens a modal)
• Inclined planes review (Opens a modal)
• Forces and inclined planes 4 questions Practice
• Force of friction keeping the block stationary (Opens a modal)
• Correction to force of friction keeping the block stationary (Opens a modal)
• Force of friction keeping velocity constant (Opens a modal)
• Intuition on static and kinetic friction comparisons (Opens a modal)
• Static and kinetic friction example (Opens a modal)
• Friction review (Opens a modal)
• Static and kinetic friction 4 questions Practice
• The force of tension (Opens a modal)
• Mild and medium tension (Opens a modal)
• Super hot tension (Opens a modal)
• What is tension? (Opens a modal)
• Tension in an accelerating system and pie in the face (Opens a modal)
• Tension (basic) 4 questions Practice
• Tension - Objects in Equilibrium 4 questions Practice

Treating systems

• Treating systems (the hard way) (Opens a modal)
• Treating systems (the easy way) (Opens a modal)
• Two masses hanging from a pulley (Opens a modal)
• Three box system problem (Opens a modal)
• Masses on incline system problem (Opens a modal)
• What is Newton's second law? (Opens a modal)

Centripetal forces

• Introduction to centripetal force (Opens a modal)
• Identifying centripetal force for ball on string (Opens a modal)
• Identifying centripetal force for cars and satellites (Opens a modal)
• Identifying force vectors for pendulum: Worked example (Opens a modal)
• Centripetal forces review (Opens a modal)
• Identifying centripetal forces 4 questions Practice

Centripetal force problem solving

• Centripetal force problem solving (Opens a modal)
• What is a centripetal force? (Opens a modal)
• Yo-yo in vertical circle example (Opens a modal)
• Bowling ball in vertical loop (Opens a modal)
• Mass swinging in a horizontal circle (Opens a modal)

Introduction to linear momentum and impulse

• Introduction to momentum (Opens a modal)
• Force vs. time graphs (Opens a modal)
• Linear momentum review (Opens a modal)
• Impulse review (Opens a modal)
• Calculating linear momentum and change in momentum 4 questions Practice
• Momentum and velocity from force vs. time graphs 4 questions Practice
• Change in momentum and speed from force vs. time graphs 4 questions Practice

Conservation of linear momentum and elastic collision

• What is conservation of momentum? (Opens a modal)
• Impulse and momentum dodgeball example (Opens a modal)
• Bouncing fruit collision example (Opens a modal)
• Momentum: Ice skater throws a ball (Opens a modal)
• Conservation of linear momentum (basic) 4 questions Practice
• Apply: conservation of momentum calculations 4 questions Practice

Collision in 2D

• 2-dimensional momentum problem (Opens a modal)
• 2-dimensional momentum problem (part 2) (Opens a modal)
• What are two dimensional collisions? (Opens a modal)