A bar magnet having a magnetic moment of T is free to rotate in a horizontal plane

PHYSICS · Subjective · CBSE · Physics · Magnetism and Matter · Magnetism and Matter

Problem

A bar magnet having a magnetic moment of

2 \times 10^4 \text{ JT}^{-1}

T is free to rotate in a horizontal plane. A horizontal magnetic field

B = 6 \times 10^{-4}

T exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction

60^\circ

from the field is a)

0.6 \text{ J}

12 \text{ J}

2 \text{ J}

6 \text{ J}