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Question

A faint (or soft) sound can be changed to a loud sound by increasing its :

A
wavelength
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B
frequency
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C
amplitude
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D
time-period
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Solution

The correct option is B amplitude
(First figure has more amplitude so more loudness)
Loudness of sound is directly proportional to square of Amplitude.
So increasing the amplitude intensifies the sound and can be heard over greater distances.

584169_337489_ans_f6e8e93532a4436e99ed516b2a03dbb5.png

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