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A "bar" magnet is at right angles to a u...

A "bar" magnet is at right angles to a uniform magnetic field. The couple acting on the magnet is to be one fourth by rotating it from the position. The angle of rotation is

A

`Sin^(-1)(0.25)`

B

`90^(@)-Sin^(-1)(0.25)`

C

`Cos^(-1)(0.25)`

D

`90^(@)-Cos^(-1)(0.25)`

Text Solution

Verified by Experts

The correct Answer is:
B
`C=MB sin theta`
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