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A metal wire of linear mass density of 9...

A metal wire of linear mass density of `9.8g//m` is stretched with a tension of `10 kg-wt` between two rigid support `1meter` apart. The wire passes at its middle point between the poles of a permanent magnet, and it vibrates in resonance when carrying an alternating current of frequency `n`. the frequency `n` of the alternating source is

A

`50Hz`

B

`100Hz`

C

`200Hz`

D

`25Hz`

Text Solution

Verified by Experts

The correct Answer is:
A
`n=(1)/(2l)sqrt((T)/(mu))`
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