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A tuning fork produces 7 beats/s with a tuning fork of frequency 248Hz. Unknown fork is now loaded and 7 beats/s are still heard. The frequency of unknown fork was

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255 Hz

234 Hz

241 Hz

248 Hz

answer is C.

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Detailed Solution

The frequency of the unknown fork could be 255 or 241.

If the fork is loaded, the frequency will be decreased.

If the frequency of the fork was 241 on waxing there is no chance of getting 7 beats again with 248Hz.

So the frequency of fork is 248Hz.

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