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A fork of unknown frequency gives 4 beat...

A fork of unknown frequency gives 4 beats per second when sounded with another of frequency `256`. The fork is now loaded with a piece of wax and again 4 beats per second are heard. Calculate the frequency of the unknown fork.

A

256 Hz

B

252 Hz

C

264 Hz

D

260 Hz

Text Solution

Verified by Experts

The correct Answer is:
D
Freq. of unknown fork=256`pm`4=260 or 252
as frequency decreases on loading, therefore, original freq. of unknown fork =260 Hz
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