Question

In order to reduce the loudness of a sound we have to
(a) decrease its frequency of vibration of the sound.
(b) increase its frequency of vibration of the sound.
(c) decrease its amplitude of vibration of the sound.
(d) increase its amplitude of vibration of the sound.


NCERT Class VIII
Science - Exemplar Problems

Chapter 13. Sound

Answer 1

The answer must be (c) decrease it's amplitude of vibration of sound

Answer 2

Answer:

Option C.

Explanation:

Decrease its amplitude of vibration of the sound is the right answer.

Since the loudness depends on the amplitude, accordingly, if we increase the amplitude the loudness of sound will be increased and if we decrease the amplitude the loudness of sound will be decreased. Therefore, the correct answer is option C.