Question

One mark questions:
1) Write an expression for torque acting on a bar
magnet of dipole moment 'm' is placed in a
uniform magnetic field 'B'.​

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 . ... Hence, moment of the magnet M is equal to the torque necessary tokeep the magnet at right angles to a magnetic field of unit magnetic induction

Explanation:

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