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A bar magnet of magnetic moment 10-J//T ...

A bar magnet of magnetic moment `10-J//T` is free to rotate in a horizontal plane. The work done in rotating the magnet slowly from a direction parallel to a horizontal magnetic field of `4x×10` T to a direction `60^(o)` from the field will be

A

0.2 J

B

2.0 J

C

4.18 J

D

`2xx10 J`

Text Solution

Verified by Experts

The correct Answer is:
A
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