# NCERT Solution Physics – Class 11

## NCERT Solution (Class 11) > Physics

NCERT Solution Class 11 Physics: National Council of Educational Research and Training (NCERT) Class 11 Physics Solution. Free PDF Download facility available at our website.

 Board NCERT (followed by CBSE) Class 11 Subject Physics Topic Exercise Solution

Many aspirants from science background or competitive exam background are facing problems in getting concepts of physics as this subject contains many complicated concepts and many higher mathematical formulas and calculations but this article is the one stop solution for those aspirants.

We all say that class 11 is foundation of class 12 and class 12 is foundation of our career so for making career bright one should be sound in concepts from class 11 and this article will fulfill all the needs as solutions provided here are thoroughly prepared by experts and all the answers are written in lucid and informative manner. All the approaches followed here for answering each and every question of exercise will build the strong base for the aspirants which will help him or her to achieve good marks in exams.

### NCERT Class 11 Chapter wise Solutions and Learning from Each Chapter

Part – I

Deleted Chapters (NCERT 2023 – 24)

Physical World

Part – II

CHAPTER 1 – PHYSICAL WORLD

This chapter introduces  meaning of word physics in front of students and make them familiar with history of science, real world phenomenon which are gifts of science . you will be introduced to the scope and excitement of physics .

Along with this all the renowned scientist and their contributions to the science will be mentioned in this chapter which will make you fall in love with their stories and their experiments which will help you to understand physics easily. Again types of fundamental forces and their characteristics will be known to everyone while going through solutions of exercise.

CHAPTER2- UNITS AND MEASUREMENT

Each and every thing around you is measured in terms of unit .these units used by us are different depends upon area . American students are using pound unit for weight on the other hand we are using kilogram for measuring the weight. Why this difference came ?what is the solution to this problem ? in what scientist made the standardized system for deciding unit of each quantity available with us. All the mysteries are solved in this chapter through the exercise solution mentioned in detailed manner in this article.

CHAPTER3- MOTION IN A STRAIGHT LINE

Various concepts like distance , displacement, velocity, speed, acceleration, momentum and many more are discussed in this chapter. As these concepts are backbone of kinetic and kinematic physics and one should know all these concepts and formulas and methods to solve complicated problems coming in all the annual exams or competitive exams as these are favorite topics of examiners. Various graphs plotting of displacement vs time, velocity vs time, acceleration vs time for one dimensional, two dimensional motions are learnt here by solving exercises. One should go through all the solutions provided here to make them sound in these topics.

CHAPTER4- MOTION IN A PLANE

All the physical quantities are classified in three types scalar, vector and tensors. Students dafter going through this chapters solution will understand how physical quantities are classified into scalars and vectors and how they are added, subtracted, multiplied or divided by following different methods like analytical or graphical. Most observed phenomenon’s like relative motion, circular motion or projectile motion will be discussed here so that learners will feel real phenomenon by the physics eye. Solution to the exercise will help all students to develop approaches to see real world problems in mathematical terms.

CHAPTER5- LAWS OF MOTIONS

This chapter is base of mechanics. all the concepts and problems discussed here are playing major role in class 12th mechanics portion or higher studies mechanics portion so one should solve and refer all the solutions provided for exercise of this chapter. Newtons laws of motion, conservation of momentum, laws of inertia all these concepts will help you to solve any problem in mechanics and will help you to understand physics in more lucrative way.

CHAPTER6- WORK ENERGY AND POWER

Many concepts like work energy theorem, work done by variable forces, kinetic energy, potential energy, conservation of energy , power , collision etc. are covered in this chapter . various numerical are solved after clearing concepts from this chapter and all the numerical exercise and their solution should be followed by one who is interested in becoming master in these concepts as these concepts will pop up again and again in 12th board and various competitive exams also .we recommend the students to go through all the numerical solutions provided by us and make yourself confident in solving the complicated problems from these concepts.

CHAPTER7- SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

In the earlier chapters we primarily considered the motion of a single particle.. Any real body which we encounter in daily life has a finite size. In dealing with the motion of bodies of finite size often the idealized model of a particle is not accurate and useful. In this chapter We shall attempt to build an understanding of the motion of extended bodies. An extended body, in the first place, is a system of particles. We shall begin with the consideration of motion of the system as a whole. The centre of mass of a system of particles will be a key concept here. We shall discuss the motion of the centre of mass of a system of particles. Then moment of inertia, radius of gyration, torque parallel axis theorem, perpendicular axes theorem, momentum angular momentum and many more. Students are highly recommended to go through all the solutions provided here to make the concepts more clear and numerical ability more sound.

CHAPTER 8 – GRAVITATION

Every person knows that earth rotates about sun , body falls on ground when thrown upward after some time  but why? Answer to these questions is gravity and force responsible is gravitational force coined by the great scientist newton. But before newton many scientists worked on this like Kepler who gave us Kepler three laws of planetary motion. all these laws along with all the advance terms like gravitational potential , gravitational potential energy, satellite launching phenomenon, geostationary satellites, escape velocity of satellite, critical velocity etc.

CHAPTER 9 – MECHANICAL PROPERTIES OF SOLIDS

you stretch a helical spring by pulling its ends, the length of the spring will increase. When you leave the ends of the spring, it regains its original size and shape. On the other hand when one press the mud and leave it will not regain the original dimensions means body will behaves differently depends upon properties called elasticity and plasticity. Students will learns these properties along with many other like young’s modulus, bulk modulus , modulus of rigidity, stress strain curves and hooks law etc etc.

Can we design an aero plane which is very light but sufficiently strong? Why does a railway track have a particular shape like I? Why is glass brittle while brass is not? Answer to these questions are lies in the concepts of this chapter. One should follow all the concepts from this chapter.

CHAPTER 10 – MECHANICAL PROPERTIES OF FLUIDS

Liquid and gases are fluids and their properties are discussed in this chapter. Pressure, Pascal’s law and its application and many more properties of fluids are discussed here. We all know that rain drop is of spherical shape why not triangular or any other shape? Why we use detergent to wash cloths? Why hot water can remove stains easily than cold water? Answer to all these questions are answered here under the heading of surface tension so everyone should go through all concepts and numerical of this chapter through our solutions provided here.

CHAPTER 11- THERMAL PROPERTIES OF MATTER

Temperature is a measure of ‘hotness’ of a body.. In physics, we need to define the heat, temperature, more carefully. In this chapter, you will learn what heat is and how it is measured, and study the various processes like conduction, convection or radiation by which heat flows from one body to another.in this chapter You will learn what happens when water boils or freezes, and its temperature does not change during these processes even though a heat is flowing into or out of the system. The great law of newton’s law of cooling and its numerical are important part of any competitive exam or part of annual exams so students are advised to go through the numerical solutions provided for exercise here to get to know the simplest way to use newton’s law of cooling.

CHAPTER12-THERMODYNAMICS

This chapter is backbone for 12th standard as it covers many concepts like thermodynamics, laws of thermodynamics, refrigeration and heat pump, Carnot engine etc.  all the modern engines work on the diesel or petrol engines but main theme of these engine resides in this chapter.

CHAPTER13-KINETIC THEORY

Behavior of gas is bitterly explained by this theory. Many scientists contributed to develop this theory are Maxwell, Boltzmann . Behavior of gases and justification about values of specific heat of gases are explained here with the help of kinetic theory. Ideal gas laws like Boyles law, Charles law,  Avogadro’s law the famous number Avogadro’s number are the beauty of this chapter so one should go thoroughly through these concepts to know more about the gases and their properties.

CHAPTER 14-OSCILLATIONS

In your childhood, you must have enjoyed swinging on a swing. Both these motions are repetitive in nature but different from the periodic motion of a planet. Here, the object moves to and fro about a mean position. The pendulum of a wall clock executes a similar motion. Examples of such periodic to and fro motion is the piston in a steam engine going back and forth Such a motion is termed as oscillatory motion. In this chapter we study this motion.

The study of oscillatory motion is important for understanding of many physical phenomena. In musical instruments, like the sitar, the guitar or the violin, we come across vibrating strings that produce pleasing sounds. The vibrations of air molecules make the propagation of sound possible.AC power supply give voltage that oscillates alternately going positive and negative about the mean value. So all the laws governing oscillations are introduced in this chapter one should follow these terminologies to get to know about oscillations.

CHAPTER 15 – WAVES

Sound we listen , light we observe, waves on string all are waves.TO know better about these phenomenon we should know all the characteristics of waves .so this chapter will introduce you with the type of waves , various properties of waves, combination of waves then introduce to beats, Doppler effect etc.