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When a guitar string is sounded with a 4...

When a guitar string is sounded with a 440 Hz tuning fork a beat frequency of 5 Hz is heard if the experiment is repeated with a tuning fork of 437 Hz ,the beat frequency is 8 Hz .The string frequency (Hz ) is

A

445

B

435

C

429

D

448

Text Solution

Verified by Experts

The correct Answer is:
A
1st case :
`f_("string")=440pm5=445or435`.
2nd case :
`f_("string")-437=8`
`therefore f_("string")=437+8=445Hz`.
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