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Question

When we change feeble sound to loud sound, we increase its ______.

A
velocity
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B
amplitude
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C
wavelength
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D
frequency
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Solution

The correct option is B amplitude
The loudness of sound is determined by the amplitude of sound waves. As loudness of the sound is directly related to the amplitude of sound waves, so when we change feeble sound to loud sound, we increase the amplitude of sound waves.

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