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Question

Complete the following sentences :

(a) The pitch of sound increases if its frequency ......................................

(b) If the amplitude of a sound is halved, its loudness becomes ......................

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Solution

(a) The pitch of sound increases if its frequency increases.


(b) If the amplitude of a sound is halved, its loudness becomes one-fourth.
This is because loudness or intensity is proportional to square of amplitude.


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