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A bar magnet of magnetic moment 200 A-m^...

A bar magnet of magnetic moment `200 A-m^(2)` is suspended in a magnetic field of intensity `0.25 N//A-m`. The couple required to deflect it through `30^(@)` is

A

`50 N-m`

B

25 N-m

C

20N-m

D

15N-m

Text Solution

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The correct Answer is:
B
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