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Standing wavs are produced in a stretche...

Standing wavs are produced in a stretched string of length 8 m. If the string vibrates in 4 loops and the wave velocity is 20 m/s, then the frequency of the string will be

A

2 Hz

B

5 Hz

C

`7.5` Hz

D

10 Hz

Text Solution

Verified by Experts

The correct Answer is:
B

`lambda/2 = 2 m " " :. l = 4 m " " :. n = V/lambda = 20/4 = 5 ` Hz
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