44.What happens to a bar magnet of dipole moment (m) is placed in a uniform magnetic field (B)? [A] the force on the bar magnet is zero [B] the torque on the bar magnet is m × B [C] Both a and b [D] None of the above Show Answer
When a bar magnet of dipole moment m is placed in a uniform magnetic field B, The force on it is zero, The torque on it is m × B, The Potential energy is –m.B, where we choose the zero of energy at the orientation when m is perpendicular to B.
