Q.

The loudness of sound is determined by its


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a

amplitude of vibration

b

ratio of amplitude and frequency of vibration

c

frequency of vibration

d

product of amplitude and frequency of vibration 

answer is A.

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Detailed Solution

The distance between the starting point and the maximum displacement of the wave is called amplitude.  Sound will be loud when its amplitude is large and sound will be soft when its amplitude is small. Thus, the loudness of sound is determined by its amplitude of vibration.
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