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If n is frequency of a.c. mains, then fr...

If `n` is frequency of a.c. mains, then frequency of sonometer wire at resonance is

A

` 2 n`

B

`n`

C

`n//2`

D

`4 n`

Text Solution

Verified by Experts

The correct Answer is:
A
Frequency of sonometer wire is `2 n`, being double the frequency of a.c. mains.
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