NCERT Solutions for Class 11 Physics Chapter 14 Oscillations

NCERT Solutions for Class 11 Physics Chapter 14 Oscillations: We have seen different kinds of motions, motion along a straight line, motion in a plane, projectile motion, etc. The motion which repeats after a certain interval of time is called periodic motion. For example, the motion of a planet around the sun, the motion of pendulum of a wall clock is periodic but it is a to and fro motion. Such to and fro periodic motion about a mean position is known as oscillatory motion. In NCERT Solutions for Class 11 Physics, Chapter 14 Oscillations introduces the periodic and oscillatory motions. 

Another important term we will study in the NCERT Solutions for Class 11 Physics Chapter 14 is the Simple Harmonic Motion (SHM). SHM is the simplest form of oscillatory motion. In SHM the force on the oscillating body is directly proportional to the displacement about the mean position and is directed towards the mean position.

The main topics under NCERT Solutions for Class 11 Physics Chapter 14 Oscillations are listed below.

14.1 Introduction

14.2 Periodic and oscillatory motions

14.3 Simple harmonic motion

14.4 Simple harmonic motion and uniform circular motion

14.5 Velocity and acceleration in simple harmonic motion

14.6 Force law for simple harmonic motion

14.7 Energy in simple harmonic motion

14.8 Some systems executing simple harmonic motion

14.9 Damped simple harmonic motion

14.10 Forced oscillations and resonance

Other types of oscillatory motions that are discussed in the NCERT class 11 Physics Chapter 14 are damped oscillations and forced oscillations. In damped oscillation, as the name indicates the oscillation gets damped after an interval of time. And if the damping is small the motion will be approximately periodic, the position-time graph of such damping oscillation is shown below.

We have seen the oscillation of a pendulum, this oscillation will be damped unless an external force is applied to maintain the oscillation. Such maintained oscillation due to an external agency is called forced or driven oscillations.

At the end of the NCERT for Class 11 Physics there are questions for practice. We provide NCERT Solutions for class 11 to these questions in detail.

Below are the NCERT Solutions for Class 11 Physics Chapter 14 Oscillations:

Q-14.1 Which of the following examples represent periodic motion?

• (a) A swimmer completing one (return) trip from one bank of a river to the other and bank.
• (b) A freely suspended bar magnet displaced from its N-S direction and released.
• (c) A hydrogen molecule rotating about its centre of mass.
• (d) An arrow released from a bow

View all NCERT solutions for class 11 physics chapter 14 Oscillations here.

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