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# NCERT Solutions Class 11 Physics Chapter 13 Oscillations - PDF Download

Class 11 NCERT Solutions for Class 11 Physics Chapter 13 Oscillations provided here is one of the most common topics in the Physics examination. The NCERT solutions are created by our subject experts in accordance with the latest update on board Syllabus 2023-24. You can easily understand the concepts of Oscillation by referring to the NCERT Solutions from eSaral. Class 11 is a stage where you can start to prepare for various competitive exams like JEE, NEET and many state boards, for which subjects like Physics, Chemistry, Mathematics and Biology play an important role.

The study of oscillatory motion is very basic in Physics class 11. You can understand the basic concepts covered in this chapter by referring to the NCERT Solutions available at eSaral. The solutions are created by a highly experienced faculty who possess best knowledge in the respective field. They make sure to provide the students with quality solutions as per the marks weightage allotted to each topic under the exam pattern. Get the NCERT Solutions for Class 11 Physics Chapter 13 PDF here.

## Subtopics of Class 11 Physics Chapter 13 Oscillations

• Introduction

• Periodic and oscillatory motions

• Simple harmonic motion

• Simple harmonic motion and uniform circular motion

• Velocity and acceleration in simple harmonic motion

• Force law for simple harmonic motion

• Energy in simple harmonic motion

•  The Simple Pendulum

Students are suggested to get well-versed in the concepts of this chapter to score good in their examinations. The concepts in this topic will also be useful for you when you prepare for competitive entrance examinations like JEE and NEET.

You must follow some strategies while preparing for their physics exams. Following are the Some effective strategies to prepare are given below.

• Students must know the latest Syllabus 2023-24 completely during their preparation. It will help you to understand the pattern of the exams.

• Students must strictly follow a timetable during their preparation.

• You must thoroughly follow the NCERT books while preparing.

• Making notes is one of the best ways to remember the concepts for a longer time.

• Students should practice lots of question papers and sample papers.

Our expert teacher brings you the best study materials, notes, sample papers, important questions, MCQs, NCERT Books, tips and tricks that help you to face the Class 11 examinations confidently and score well.

### Introduction

In this topic we will learn about the oscillatory motion and the description of a periodic motion, in general, and oscillatory motion, in particular, requires some fundamental concepts, like period, frequency, displacement, amplitude and phase which is explained in the next topic.

### Periodic And Oscillatory Motions

In this topic we will get to know more about oscillatory motion with help of examples and with diagrams.

The object undergoing periodic motion has an equilibrium position somewhere inside its path, when the body is at this position no net external force acts on it. Therefore, if it is left there at rest, it remains at rest forever. If the object or a body is given a small displacement from the position, a force comes into play which tries to bring the body back to the equilibrium point, giving rise to oscillations or vibrations. For instance, a ball placed in a bowl will be in equilibrium at the bottom place. If displaced a little from its point, it will perform oscillations in the bowl. Every oscillatory motion is periodic, but not every periodic motion is oscillatory. Circular motion is periodic, but it is not oscillatory motion.

### Simple Harmonic Motion

In this topic we will discuss SHM simple harmonic motion with various examples and with diagrams. A Simple Harmonic Motion, or SHM, is known as a motion in which the restoring force is directly proportional to the displacement of the body from its mean position. The direction of this restoring force is always towards the mean position.

### Simple Harmonic Motion And Uniform Circular Motion

In this section, we will learn that the projection of uniform circular motion on a diameter of the circle follows simple harmonic motion. There is a simple experiment that helps us visualise this connection. First tie a ball to the end of a string and make it move in a horizontal plane about a fixed point with a constant angular speed. The ball will then perform a uniform circular motion in the horizontal plane.

### Velocity And Acceleration In Simple Harmonic Motion

In this section of chapter 13 class 11 we will get to know about velocity and acceleration in SHM with examples and there is one derivation for this. Along with this there are different type of numerical problems.

### Energy In Simple Harmonic Motion

A body exhibiting simple harmonic motion or SHM has potential energy by virtue of its displacement from the mean position. By virtue of SHM velocity, it also possesses kinetic energy. During the oscillatory motion, these energies may vary, but their sum remains constant, provided no dissipative forces are present.

### The Simple Pendulum

The simple pendulum contains a small bob of mass 'm' suspended by a thin string secured to a platform at its upper end of length ‘L’. The simple pendulum is a mechanical system that moves or sways in an oscillatory motion. This motion occurs in a vertical plane and is generally driven by gravitational force.

## Key Points of NCERT Solutions for Class 11 Physics Chapter 14

In our day to day life, we encounter various kinds of motions. The study of oscillatory motion is basic to Physics. Oscillations and Resonance is one of the most interesting chapters in class 11th. One will get to know about periodic motion, simple harmonic motion, and other related concepts from this chapter. Following are some important concepts and key points of Oscillations and Resonance are given below.

• The period ‘T’ is the least time after which motion repeats itself. Thus, motion repeats itself after nT where n is an integer number.

• Every periodic motion is not SHM. Only that periodic motion governed by the force law F = – k x is called simple harmonic.

• The motion of a simple pendulum is called a simple harmonic for small angular displacement.

## Benefits of NCERT Solution for Class 11 Physics Chapter 13 PDF

Most students study reference books alongside their NCERT books as an effort to gain further insight into the subjects. Referring to our Class 11 Physics NCERT solutions chapter 13 will help you in numerous ways, some of which are:

• Simplify Learning

NCERT Solution for Class 11 Physics Chapter 13 was curated with the prime objective of helping you in your studies.

NCERT solutions for Class 11 physics chapter 13 PDF is created by a team of expert physics teachers. Our expert subject teachers are the masters in their own field - teachers, lecturers or PhD holders in the subject.

• Problem-Solving Approach

A problem-solving approach to studying by NCERT solutions for Class 11 Physics Chapter 13 PDF is designed to maximise your understanding of this chapter 13.

Chapter 13 Class 11 Physics NCERT solutions answer every question and clarify all your doubts for a better learning experience. You can clear your doubts by our solutions, making learning a fun activity.

• Free Resource

Fluids NCERT solutions Class 13 is available in a PDF format for your convenience on our website.

Question 1: What are the main features of NCERT Solutions for Class 11 Physics Chapter 14 Oscillations.

Answer : NCERT Solutions for Class 11 Physics Chapter 13 Oscillations designed by eSaral has many salient features. These are given below:

• Our solutions are available in a free PDF.

• It is an ideal resource for studies and exam preparation for boards and other competitive exams.

• It will help you to understand the critical concepts related to Oscillations properly.

• The solutions provided by subject experts can assist students to solve exercise questions given in the textbook.

• These solutions cover exercise questions, simplified for students’ reference.

• It helps in doubting resolutions.

• Solutions are prepared by experts as per the latest syllabus and NCERT guidelines.

• It helps you in scoring well in exams.

Question 2: What are the topics in chapter 13?

Answer : Following are topics in chapter 13 class 11th

• Introduction

• Periodic and oscillatory motions

• Simple harmonic motion

• Simple harmonic motion and uniform circular motion

• Velocity and acceleration in simple harmonic motion

• Force law for simple harmonic motion

• Energy in simple harmonic motion

•  The Simple Pendulum  