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A vibrating string produces 2 beats per ...

A vibrating string produces 2 beats per secod when sounded with a turning fork of frequency `256Hz`. Slightly increasing the tension in the string produces 3 beats per second. The initial frequency of the string may have been

A

`253Hz`

B

`254Hz`

C

`258Hz`

D

`259Hz`

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The correct Answer is:
B, C, D
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