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A magnet of moment 4Am^(2) is kept suspe...

A magnet of moment `4Am^(2)` is kept suspended in a magnetic field of induction `5xx10^(-5)T`. The workdone in rotating it through `180^(@)` is

A

`4xx10^(-4)J`

B

`5xx10^(-4)J`

C

`2xx10^(-4)J`

D

`10^(-4)`

Text Solution

Verified by Experts

The correct Answer is:
A
`W=MB[costheta_(1)-costheta_(2)]`
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