Question

Derive an expression for torque acting on the magnetic dipole in a uniform magnetic field​

Answer 1

Answer:

Consider a bar magnet NS of length 2l and pole strength m placed in a uniform magnetic field of induction B at an angle θ with the direction of the field (Fig.). ... Hence, moment of the magnet M is equal to the torque necessary to keep the magnet at right angles to a magnetic field of unit magnetic induction.