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A magentic dipole in a constant magnetic...

A magentic dipole in a constant magnetic field has

A

Maximum potential energy when the torque is maximum

B

Zero potential energy when the torque is minimum

C

Zero potential energy when the torque is maximum.

D

Minimum potential energy when the torque is maximum

Text Solution

Verified by Experts

The correct Answer is:
C
`U = - MB cos theta`
where , `tau_(max) = MB " at " theta = 90^@`
therefore `U = 0`
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