JEE Mains · Physics · STD 12 - 5. Magnetism and matter
A magnetic 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.
Answer & Solution
Correct Answer
(C) zero potential energy when the torque is maximum
Step-by-step Solution
Detailed explanation
Potential energy of dipole, \(U = - pE\,\cos \,\theta \) Torque experienced by dipole \(\tau = pE\,\sin \,\theta \) Torque will be maximum \(({\tau _{\max }})\) when \(\theta = {90^o}\) then potential energy \(U = 0\)
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