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A sonometer wire is in unison with a tun...

A sonometer wire is in unison with a tuning fork . When its length increases by 4% , it gives 8 beats/with the same fork. What is the frequency of the fork ?

A

196 Hz

B

200 Hz

C

204 Hz

D

208 Hz

Text Solution

Verified by Experts

The correct Answer is:
B
`(Deltan)/(n) = (Deltal)/(l_(2))`
`(8)/(n) = (4)/(104)`
`n = 2 xx 104 = 208 Hz`
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