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### NCERT Solutions for Class 11 Physics

Byju’s provides NCERT Solutions for Class 11 CBSE that have been reviewed by our top experts in physics. The chronological solution for class 11 physics has been shared so that students are able to solve questions from NCERT textbooks easily. Along with solutions, sample papers as also been shared so that students can prepare well to fetch good marks in CBSE board examination.

The solutions are provided Chapter –wise and even solutions are provided to the exercise questions that are stated after every unit or a chapter. In order for students to know which topics have to be studied in detail from exam point of view, each topic has been marked along with marks weightage of each question.

Chapter–1: Physical World
Chapter–2: Units and Measurements
Chapter–3: Motion in a Straight Line
Chapter–4: Motion in a Plane
Chapter–5: Laws of Motion
Chapter–6: Work, Energy and Power
Chapter–7: System of Particles and Rotational Motion
Chapter–8: Gravitation
Chapter–9: Mechanical Properties of Solids
Chapter–10: Mechanical Properties of Fluids
Chapter–11: Thermal Properties of Matter
Chapter–12: Thermodynamics
Chapter–13: Kinetic Theory
Chapter–14: Oscillations
Chapter–15: Waves

## Laws of Motion

Chapter – 5: Laws of Motion     Q1.What is the direction and magnitude of the net force working on ( a ) a hovercraft moving at a constant speed of 20 km/h on a rough road, ( b ) a bottle cap of mass 5 gm  floating on wine, ( c ) an  electron […]

## Units and measurements

Chapter – 2: Units and measurements   Question 1:  Complete the following: (1) A cube whose sides measure 2 cm each has a volume equal to ________ Ans: 2 cm = m Volume of the cube = = m m m = 8 x 106 Therefore, the volume = 8 x 106 (2) A solid cylinder having […]

## Kinetic Theory of Gases

Chapter-13 : Kinetic Theory of Gases   Q.1: Calculate the ratio of molecular volume to the actual volume of oxygen gas at standard temperature and pressure. (Diameter of oxygen molecule = 3Å)   Sol: Diameter of an oxygen molecule, d = 3Å Radius, r =d/2 = 1.5 Å = 1.5 × 10 – 8 cm […]

## System of Particles and Rotational Mo...

Chapter 7 : System of Particles and Rotational Motion   Q1. Where is the  center of mass of the following structures located ( a ) ring , ( b ) cube, ( c ) sphere , and ( d ) cylinder. Is it necessary for a body’s center of mass to lie inside it ? […]

## Work, Energy and Power

Chapter – 6 : Work, Energy and Power    Que.1. It is important to understand the sign of  work done by a force on a body. Find whether the following are positive or negative: (a) The work done in lifting of a bucket by the use of  a rope. (b) The work done by the […]

## Motion in a Plane

Chapter- 4: Motion in a Plane       Q-1: State whether the following physical quantities are scalar or vector.                     (i) Mass (ii) Volume (iii) Speed (iv) Acceleration (v) Density (vi) Number of moles (vii) Velocity (viii) Angular frequency (ix) Displacement (x) Angular velocity   Ans: Scalar: Density, mass, speed, volume, angular frequency, number of moles. […]

## Waves

Chapter 15: Waves   Q1. A 5 kg string is under 400 newton of tension. The string is stretched to 40.0 m. If one end of the string is given a transverse jerk, find the amount of time taken by the disturbance take to reach the other end?   Ans: Given, Mass of the string, […]

## Oscillations

Chapter 14:  Oscillations Q1. Which of the following is periodic motions: (a) A swimmer making to and fro laps in a river. (b) A star revolving around a black hole. (c) A bullet fired from a gun. (d) A freely suspended bar magnet is moved away from its N –S direction and released. ANSWER: ( […]

## Mechanical Properties of Fluids

Chapter 10: Mechanical Properties of Fluids   Q.1: Explain the following: (i). Humans have a greater blood pressure in their feet than in the head (ii). Even though the atmosphere extends over 100 km from the sea level. Atmospheric pressure at an altitude of about 6 km is almost half of its value at sea level. […]

## Physical World

Chapter 1: Physical World   Q 1. Albert Einstein proposed some of the most important statements on the way science works. What was Einstein trying to say when he stated, “The most incomprehensible thing about the world is that it is comprehensible”? Ans: The complete physical world is naturally complex. The biological world has its own […]