NCERT Solutions For Class 11 Physics (All Chapters) PDF Free Download Updated For 2020-21

CBSE NCERT Solutions For Class 11 Physics 2020-21: Embibe brings you the best NCERT Solutions for Class 11 Physics with PDF which can be downloaded for free. These solutions cover all the chapters of NCERT Class XI Physics book. Read on to know more and download CBSE NCERT Solutions for Class 11 Physics (All Chapters) with PDF.

PRACTICE CLASS 11 PHYSICS QUESTIONS HERE

NCERT Solutions For Class 11 Physics CBSE PDF Download

NCERT Class 11 Physics solutions for each chapter are as under:

NCERT Solutions for 11th Class Physics provided here can be downloaded by anyone without spending a penny. In order to download these solutions, all you need to do is just click on the links provided above and get on to downloading chapter-wise Class 11 Physics NCERT solutions.

List Of Deleted Topics In CBSE Class 11 Physics For 2020-21

Due to the pandemic, the officials have reduced the CBSE Class 11 Physics syllabus up to 30%. So candidates who are preparing for the Class 11 exams can exclude those topics in CBSE Class 11 Physics NCERT Solutions and prepare for the exams. The list of topics that are deleted are tabulated below:

Chapter Name	List Of Deleted Topics
Chapter 1: Physical World	Physics scope and excitement, nature of physics laws, Relation between physics, technology, and society
Chapter 3: Motion in a Straight line	The frame of reference, position and time graph, speed and velocity
Chapter 5: Laws of Motion	Concept of force, inertia, Newton’s first law of motion, momentum, Newton’s second law of motion, impulse, and Newton’s third law of motion.
Chapter 7: System of Particle and Rotational Motion	Statements of parallel and perpendicular axis theorems and their applications.
Chapter 8: Gravitation	Kepler’s laws of planetary motion, acceleration due to gravity.
Chapter 9: Mechanical Properties of Solids	Elastic behaviour, Shearing modulus of rigidity, Poisson’s ratio, and elastic energy
Chapter 11: Thermal Properties of Matter	Heat, temperature, heat transfer: conduction, convection, and radiation.
Chapter 12: Thermodynamics	Heat engine and refrigerator
Chapter 15: Waves	Fundamental modes and harmonics, Dopler effect

Why Refer To NCERT Solutions For Class 11 Science Physics?

CBSE Class 11 Physics NCERT Solutions provided by us have been carefully curated by subject matter experts keeping in mind the latest CBSE and NCERT guidelines. We get you NCERT Solutions for Class 11 Physics (All Chapters) with PDF so that you do not face any difficulty while downloading them. NCERT Physics Class 11 Solutions contain answers to every chapter end exercise questions from NCERT Class 11 Physics book. The solutions are supported with diagrams for better understanding of the students whenever necessary. We will also provide some preparation tips, how to use the solutions which will help students in passing Class 11 swiftly.

Benefits Of CBSE NCERT Solutions For Class 11 Physics

The NCERT Class 11 Science Physics solution provided here will be of great help to students:

1. Better Understanding of Related Concepts: The detailed Class 11 Physics Solutions will help you get a better understanding of the topics.
2. Acts as a Reference for Practice: In case of any doubt while practicing, students can refer to the solutions provided here. It will also help in a quick revision of the entire syllabus.
3. Detailed Solutions: The detailed and step-by-step solutions provided here will help students improve their problem-solving abilities.
4. Helps in Getting Hold of the Subject: Through these solutions, you will be able to understand the whole subject better.
5. Helpful in Competitive Examinations: These solutions also beneficial for competitive examinations such as NEET and JEE.

CBSE NCERT Solutions For Class 11 Physics: Chapter Descriptions

Let us have a look at what each of the chapters in the NCERT syllabus of Class 11 Physics deals with:

Class 11 Physics Chapter 1 Physical World NCERT Solutions

This chapter, Physical World, is an introductory chapter that gives an overview of what exactly Physics is and how it tries to explain the various physical phenomena in terms of a few concepts and laws. The chapter then deals with various branches of Physics – Classical Physics and Quantum Physics – and what they are about. You will also get to know about the relationship between Physics, technology, and society.

The chapter provides a wide list of scientific principles behind popular technologies. You will learn about the fundamental forces in nature – gravitational force, electromagnetic force, nuclear force, etc. Lastly, you will get a basic idea about the nature of physical laws. All the concepts in this chapter will help you lay a strong foundation in Physics. This, in turn, will help you understand the next chapters better.

NCERT Solutions For Class 11 Physics Chapter 2: Units & Measurement

In this chapter, you will learn how various physical quantities are measured. In order to measure physical quantities,  a certain basic, internationally accepted reference standard is chosen. This reference is called a unit. Measurement involves a comparison of the physical quantity with this unit. There are fundamental units and derived units (which can be expressed as a combination of the fundamental units). A set of these units to measure physical quantities of various types forms a system of units.

You will learn about the popular systems of units, like the CGS, FPS, and MKS systems of units. You will also learn about the measurement of mass, length, and time. The chapter also explains the various types of errors in measurement as well as the accuracy and precision of measuring instruments.

Lastly, you will learn about significant figures, dimensions of physical quantities, dimensional formulae, equations, analysis, and application. There are an ample number of numerical examples in this chapter to help you understand all these concepts better.

NCERT Solutions For Class 11 Physics Chapter 3: Motion In A Straight Line

This chapter starts by defining what exactly motion is – the change of position of an object with time – and then goes on to describe the motion of an object in a straight line. This is also called rectilinear motion. Various terms related to Rectilinear Motion – position, path length, displacement, average and instantaneous velocity and speed, acceleration are explained with necessary graphs and equations. You will also get to learn about kinematic equations for uniformly accelerated motion and relative velocity.

NCERT Solutions For Class 11 Physics Chapter 4: Motion In A Plane

In this chapter, you will get to know about the motion of an object in a plane, i.e. in two dimensions and its measurement. To start with, you will be introduced to scalars (quantities that have only magnitude) and vectors (quantities that have both magnitude and directions). You will learn about the multiplication of vectors by real numbers as well as the graphical methods of vector addition and subtraction. This will be followed by the resolution of vectors and the analytical method of vector addition.

A sufficient number of diagrams are used to explain these concepts. Once these basic concepts are clear, motion in a plane with constant acceleration, relative velocity in two dimensions, projectile motion, and uniform circular motion will be explained in detail.

NCERT Solutions For Class 11 Physics Chapter 5: Laws Of Motion

While Chapters 3 and 4 deal with the quantitative study of the motion of an object (both uniform and non-uniform motions), this chapter explains what causes motion. You will be introduced to the law of inertia followed by Newton’s first, second, and third law of motion. With detailed examples, you will get a clear idea about how objects move, what is force, the direction of force, and the resulting motion, the effect of gravitation, etc. The chapter also explains what momentum is and the conservation of momentum followed by the concept of equilibrium wherein the net force acting on a body is zero. Lastly, the chapter will explain the common forces in mechanics and circular motion.

NCERT Solutions For Class 11 Physics Chapter 6: Work, Power & Energy

In this chapter, you will get to learn about work, power, and energy, three very commonly used terms, from a scientific point of view, and the relationship between these three physical quantities. With the Work-Energy Theorem derived from equations learned in previous chapters, you will get a clear definition of work. You will learn about the two types of energy – kinetic and potential energy.

Further, the conservation of mechanical energy and potential energy of spring is explained in detail along with the necessary diagrams and equations. The chapter will explain the various forms of energy and how they transform from one form to another and therefrom deducing the law of conservation of energy. Lastly, you will study force and collisions.

NCERT Solutions For Class 11 Physics Chapter 7: Systems Of Particles & Rotational Motion

This chapter deals with the theoretical and mathematical aspects of the motion of extended bodies. Various concepts, like centre of mass and motion of centre of mass, the linear momentum of a system of particles, vector product of two vectors, angular velocity and its relation with linear velocity, torque and angular momentum, the equilibrium of a rigid body, moment of inertia, theorems of perpendicular and parallel axes are explained in details along with examples, diagrams, and graphs.

Lastly, the chapter explains the kinematics of rotational motion, dynamics of rotational motion, and angular momentum in case of rotation about a fixed axis followed by rolling motion.

NCERT Solutions For Class 11 Physics Chapter 8: Gravitation

We all know that gravitation is what causes all objects to fall towards the earth. In this chapter, you will have an advanced understanding of the gravitational force and various concepts related to it. You will start with Kepler’s laws which will be followed by the universal law of gravitation, the gravitational constant, acceleration due to gravity of the earth, acceleration due to gravity below and above the surface of the earth and gravitational potential energy. 

After that, this chapter will deal with escape speed – the speed with which an object should be thrown so that it escapes the gravitational force of the earth. This discussion will then lead to earth satellites, the energy of an orbiting satellite. geostationary and polar satellites and final the fascinating concept of weightlessness.

NCERT Solutions For Class 11 Physics Chapter 9: Mechanical Properties Of Solids

You have learned that the motion of a body depends on how mass is distributed within the body. However, your understanding was restricted to a simpler situation of rigid bodies – you have studied the motion of rigid bodies wherein the hard solid body has a definite shape and size. However, in real life, bodies, even a rod of iron is not rigid in the truest sense of the word – it can be bent, stressed, or compressed. So, in this chapter, you will learn about such mechanical properties of solid objects.

You will be introduced to the concept of elasticity – the property of solids by virtue of which it changes its form when a force is applied to it but regains its original form when the force is removed – and plasticity – the property by virtue of which a solid retains its changed form even after the force is removed. A scientific explanation of the elastic behavior of solids will be given to you followed by the concepts of stress and strain. These will be followed by Hooke’s law, stress-strain curve, and elastic moduli.

Lastly, you will learn about the applications of elastic behavior of materials. There are plenty of diagrams and numerical examples in this chapter to illustrate the various concepts.

NCERT Solutions For Class 11 Physics Chapter 10: Mechanical Properties Of Fluids

Liquids and gases are called fluids as they can flow. In this chapter, you will learn about some basic physical properties of fluids. The chapter also deals with how fluids are different from solids, the similarities, and differences between liquids and gases, etc. The chapter starts off with the concept of pressure and then explains various concepts, like streamline flow, Bernoulli’s principle, viscosity, and surface tension. All these concepts are explained in detail with diagrams, equations, and numerical problems.

NCERT Solutions For Class 11 Physics Chapter 11: Thermal Properties Of Matter

We all use the two terms, ‘heat’ and ‘temperature’ in our day-to-day life. This chapter gives a careful and scientific explanation of these two terms. Starting off with the definition of heat and temperature, the chapter explains how temperature is measured. This is followed by the ideal gas equation and the concept of absolute temperature. Then you will learn about the thermal expansion of matter – how solid, liquid and gas expands with temperature.

The chapter also deals with the concepts of specific heat capacity – the amount of heat per unit mass absorbed or given off by a substance to change its temperature by one unit, calorimetry (the measurement of heat), change of state of matter with temperature, heat transfer and lastly Newton’s law of cooling. All these concepts will be covered in details and you will get to know the nitty-gritty of these processes – what exactly happens behind the scenes.

NCERT Solutions For Class 11 Physics Chapter 12: Thermodynamics

Thermodynamics is the branch of science that deals with the relationship between thermal energy and other forms of energy. In this chapter, you will learn about the laws that govern thermal energy and study the processes where work is converted into heat and vice versa. The chapter starts off with the concept of thermal equilibrium followed by the Zeroth law of Thermodynamics. You will then learn how heat and work in thermodynamics help in energy transfer to a system resulting in a change in its internal energy.

You will also study the first and second laws of thermodynamics, and various concepts related to them. You will study heat engines, refrigerators, and heat pumps, and the Carnot engine in detail.

NCERT Solutions For Class 11 Physics Chapter 13: Kinetic Theory

Kinetic Theory is a very successful theory developed by Maxwell, Boltzmann, and other scientists in the 19th century, that explains the behavior of gases. This theory is based on the assumption that the gas comprises atoms and molecules which move rapidly as inter-atomic forces in gases can be neglected.

This chapter deals with this theory and starts off by explaining the molecular nature of matter and behavior of gases. You will then study the kinetic theory of an ideal gas and the law of equipartition of energy. You will then move on to the specific heat capacity of monatomic gases, diatomic gases, polyatomic gases, solids, and water. Lastly, you will learn about the mean free path.

NCERT Solutions For Class 11 Physics Chapter 14: Oscillations

In the previous chapters, you have studied non-repetitive motions – rectilinear motion and motion of projectiles. You have also studied repetitive motions, like uniform circular motion and orbital motion of planets in the solar system.

In this chapter, you will learn about a new type of motion – oscillations or oscillatory motion – the to and fro motion of an object about a mean position (Ex: the motion of a pendulum). Also called vibrations, this is a very important concept that is important to understand various physical processes.

You will be introduced to simple harmonic motion and get a detailed understanding of it – velocity and acceleration in simple harmonic motion, force law for simple harmonic motion, energy in simple harmonic motion. Some systems, like string and simple pendulum, which execute simple harmonic motion will also be explained. Lastly, you will study damped simple harmonic motion, forced oscillations, and resonance.

NCERT Solutions For Class 11 Physics Chapter 15: Waves

In the previous chapter, you studied oscillatory motion in isolation. Here, you will study the oscillatory motion in a system or a collection of objects, for example, a material medium. You will be introduced to waves which are patterns that move without the actual physical transfer of matter as a whole. 

You will get to know about transverse and longitudinal waves, displacement relation in a progressive wave, and the speed of a traveling wave. The principle of superposition of waves and reflection of waves will also be explained. 

Lastly, you will study the Doppler effect – the change in the frequency of waves with the change in the distance between the observer and the source of the wave.

Preparation Tips For CBSE Class 11 Physics

Class 11 Physics is way more different than previous classes. The concepts are much more advanced versions of what you studied in Class 10. Each chapter here brings in a lot of concepts, theories, formulas, etc, and hence requires a strategic approach.

1. To ace the subject you must first understand the concepts in-depth and know-how to approach a particular theory or question. Since most of the formulas are based on theorem and can be easily derived, they must be at your fingertips. Preparing a theorems and formula sheet helps a lot in the learning process.
2. Once you have completed a chapter start solving the intext and exercise question. You can take the help of NCERT Solutions for Physics provided by us as a reference guide.
3. Rest everything depends on your commitment to the subject and your dedication.

We hope if you keep above things in mind and follow them, you are good to go. And not to forget we also provide free Class 11 Physics Practice Questions with solutions that will improve your problem-solving abilities.

Important Questions For Class 11 Physics

Some important questions for CBSE Class 11 Physics are as under:

1. Explain clearly, with examples, the distinction between the magnitude of displacement (sometimes called distance) over an interval of time, and the total length of path covered by a particle over the same interval; 2. Derive expressions for velocity and acceleration for uniform circular motion. 3. A body of mass 0.40 kg moving initially with a constant speed of 10 ms-1to the north is subject to a constant force of 8.0 N directed towards the south for 30 s. Take the instant the force is applied to be t = 0, the position of the body at that time to be x = 0, and predict its position at t= -5 s, 25 s, 100 s. 4. A ball is dropped from the height h1 and if rebounces to a height h2. Find the value of the coefficient of restitution? 5. Four particles of mass 1kg, 2kg, 3kg, and 4kg are placed at the four vertices A, B, C, and D of a square of side 1m. Find the position of the centre of mass of the particle. 6. A body weighs 63 N on the surface of the earth. What is the gravitational force on it due to the earth at a height equal to half the radius of the earth? 7. A stone is dropped from the top of a cliff and is found to ravel 44.1m diving the last second before it reaches the ground. What is the height of the cliff? 8. Ganesh went on his bike from Delhi to Gurgaon at a speed of 60km/hr and came back at a speed of 40km/hr. what is his average speed for the entire journey? 9. A body cools from 80 °C to 50 °C in 5 minutes. Calculate the time it takes to cool from 60 °C to 30 °C. The temperature of the surroundings is 20 °C. 10. Derive the equation of state for adiabatic change? 11. Briefly describe a Carnot cycle and derive an expression for the efficiency of Carnot cycle? 12. Two perfect gases at absolute temperature T1 and T2 are mixed. There is no loss of energy. Find the temperature of the mixture if the masses of molecules are m1 and m2 and the number of molecules is n1 and n2? 13. What is Simple pendulum? Find an expression for the time period and frequency of a simple pendulum? 14. A pipe 20 cm long is closed at one end. Which harmonic mode of the pipe is resonantly excited by a 430 Hz source? Will this source be in resonance with the pipe if both the ends are open?

Some FAQs On NCERT Solutions For Class 11 Science Physics

Below are some frequently asked questions that students generally search:

If you are preparing for the Class 11 exam, you can solve the Class 11 PCMB Practice Questions for free on Embibe. Solving these questions will prepare you not only for Class 11 exams but also for future exams, like JEE Main and NEET. All questions come with detailed solutions. 

Solve Class 11 Physics Practice Questions Now

If you are planning to appear for some competitive examinations like JEE Main, JEE Advanced, and NEET, you can take the free JEE Main Mock Tests and NEET Mock Tests on Embibe. Solving these practise questions and taking these mock tests will enhance your preparation level for the exam.

We hope this article on CBSE Class 11 Physics Solutions helps you. If you have any queries regarding this write-up, do let us know about it in the comment section below. We will get back to you at the earliest. 

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