NCERT Grade 11 Physics last chapter is Chapter 15, Waves. In the previous Chapter, Oscillations, we studied the motion of objects oscillating in isolation. What happens in a system, which is a collection of such objects? A material medium provides such an example. Here, elastic forces bind the constituents to each other and, therefore, the motion of one affects that of the other.
Patterns, which move without the actual physical transfer or flow of matter as a whole, are called waves. In this Chapter, we will study such waves. This chapter will help the students in conceptual study of Transverse and Longitudinal Waves, Displacement Relation in a Progressive Wave, Amplitude and Phase, Wavelength and Angular Wave Number, Period, Angular Frequency and Frequency, The Speed of a Travelling Wave, Speed of a Transverse Wave on Stretched String, Speed of a Longitudinal Wave (Speed of Sound), The Principle of Superposition of Waves, Reflection of Waves, Standing Waves and Normal Modes, Beats, Doppler Effect, Source Moving ; Observer Stationary, Observer Moving; Source Stationary, Both Source and Observer Moving.
In this chapter, exercises testing theoretical and mathematical learning of the chapter are assessed at regular intervals that help the students to imbibe the concepts better. A part of Unit X, Oscillations and Waves, NCERT Grade 11 Physics, Chapter 15, Waves holds a weightage of 10 marks including Chapter 14, Oscillations. Get 100 percent accurate NCERT Solutions for Class 11 Physics Chapter 15 (Waves) solved by expert Physics teachers. We provide solutions for questions given in Class 11 Physics text-book as per CBSE Board guidelines from the latest NCERT book for Class 11 Physics. The topics and sub-topics in Chapter 15 Waves are given below.
Ex 15.1 - Introduction
Ex 15.2 - Transverse and longitudinal waves
Ex 15.3 - Displacement relation in a progressive wave
Ex 15.4 - The speed of a travelling wave
Ex 15.5 - The principle of superposition of waves
Ex 15.6 - Reflection of waves
Ex 15.7 - Beats
Ex 15.8 - Doppler effect.
We cover all exercises in the chapter given below:-
Chapter 15 - 27 Questions with Solutions.
Other than given exercises, you should also practice all the solved examples given in the book to clear your concepts on Waves. Download the free PDF of Chapter 15 Waves and take the print out to keep it handy for your exam preparation.