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A magnet of magnetic moment 50hatiA-m^2 ...

A magnet of magnetic moment `50hatiA-m^2` is placed along the x axis in a magnetic field `B=(0.5hati+3.0hatj)`T the torque acting on the magnet is

A

`175hatk`N-m

B

`150hatkN-m`

C

`75hatkN-m`

D

`25sqrt37hatkN-m`

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The correct Answer is:
B
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