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A bar magnet of magnetic moment 0.4 Am^(...

A bar magnet of magnetic moment `0.4 Am^(2)` is placed in a uniform magnetic field of induction `5 xx10^(-2)` tesla. What is the torque acting on the magnet if the angle between the magnetic induction and the magnetic moment is `30^(@)`.

A

`2xx10^(-2) N-m`

B

`10^(-2) N-m`

C

`3xx10^(3)N-m`

D

`0.5xx10^(-3) N-m`

Text Solution

Verified by Experts

The correct Answer is:
B
`tau=MB sin theta=0.4xx5xx10^(-2) xx sin 30^(@)=10^(-2)` Nm
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