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The length of a bar magnet is 10 cm and ...

The length of a bar magnet is 10 cm and its pole strength is `10^(-3)` Weber. It is placed in a magnetic field of induction `4 pi × 10^(-3)` Tesla in a direction making an angle `30^(@)` with the field direction. The value of torque acting on the magnet will be –

A

`2pi xx10^(-7)`N-m

B

`2pi xx10^(-5)`N-m

C

`0.5 xx10^(2)`N-m

D

0.5N-m

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