If we increase the loudness of a speaker by 9 times then the amplitude of the sound produced by it will ___________.

also increase by 9 times

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also increase by 3 times

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remain the same

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decrease to one-third

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Solution

The correct option is B also increase by 3 times

We know that loudness of a sound is proportional to the square of amplitude. Therefore, when we increase the loudness by 9 times then the amplitude will increase by 3 times.

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