EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 18 - Sound Waves>CG PET 2017>Q 1

MEDIUM

CG PET

IMPORTANT

Earn 100

A star emitting light of wavelength $5896 \overset{o}{A}$ is moving away from the earth with a speed of $3600 km / s$ . The wavelength of the light observed on the earth will

50% studentsanswered this correctly

Important Questions on Sound Waves

MEDIUM

CG PET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 18 - Sound Waves>CG PET 2018>Q 2

A car, sounding a horn of frequency

1000 Hz

, is moving directly towards a huge wall at a speed of

15 {ms}^{- 1}

. If the speed of sound is

240 {ms}^{- 1}

, then the frequency of echo heard by the driver is

MEDIUM

CG PET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 18 - Sound Waves>CG PET 2019>Q 3

At what speed should a source of sound move, so that staionary observer finds the apparent frequency equal to half of the original frequency?