STANDARD Physics Magnetic Dipole MCQ Question
A magnetic dipole in a constant magnetic field has
zero potential energy when the torque is maximum
minimum potential energy when the torque is maximum
maximum potential energy when the torque is maximum
zero potential energy when the torque is minimum.
Correct Answer
Detailed Explanation
When a magnetic dipole is placed in a uniform magnetic field, it experiences a torque τ = MB sin θ. Torque is maximum when θ = 90°, and potential energy U = -MB cos θ is zero at θ = 90°.
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