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A bar magnet of magnetic moment m is pla...

A bar magnet of magnetic moment m is placed in the position of stable equillibrium in a uniform magnetic field B. Work done in ratating it through an angle `180^@` is

A

mB

B

2mB

C

`(mB)/2`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
C
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