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A tuning fork of frequency 512 Hz makes ...

A tuning fork of frequency 512 Hz makes 4 beats//s with the vibrating string of a piano. The beat frequency decreases to 2 beats//s when the tension in the piano string is slightly increased.The frequency of the piano string before increasing the tension was

A

`510Hz`

B

`514Hz`

C

`516Hz`

D

`508Hz`

Text Solution

Verified by Experts

The correct Answer is:
C
`512~n=4impliesn` can be either `508` (or) `516`, if tension in string is increased frequency increase and has to give two beats per second. Only `508` can satisfy both cases.
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