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A bar magnet when placed at an angle of ...

A bar magnet when placed at an angle of `30^@` to the direction of magnetic field of `5xx10^(-2)` T experiences a moment of couple `25xx10^(-5)` Nm if the length of the magnet is 5cm its pole strength is

A

0.2Am

B

`5xx10^(-2)Am`

C

2Am

D

5Am

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The correct Answer is:
A
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