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Amplitude

If the loudne...

Question

If the loudness of sound is to be increased 4 times then how many times should the amplitude be increased?

A

4

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B

2

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C

8

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D

16

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Solution

The correct option is B
2

Loudness is proportional to the square of the amplitude. So, the amplitude has to be increased two times to increase loudness by four times.

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