NCERT Solutions for Chapter: Sound, Exercise 1: MULTIPLE CHOICE QUESTIONS

Which of the following statements are correct?
(i) Sound is produced by vibrations.
(ii) Sound requires a medium for propagation.
(iii) Light and sound both require a medium for propagation.
(iv) Sound travels slower than light.

An object is vibrating at $50 \mathrm{hertz}$. What is its time period?

In order to reduce the loudness of a sound we have to

Loudness of sound is measured in units of

The loudness of sound is determined by the

$1 \mathrm{hertz}$ is equal to

Pitch of sound is determined by its

Ultrasound has frequency of vibration