A bar magnet of magnetic moment M is placed at right angles to a magnetic induction B. If a force F is experienced by each pole of the magnet, the length of the magnet will be

Options

(a) F/MB
(b) MB/F
(c) BF/M
(d) MF/B

Correct Answer:

MB/F

Explanation:

FL = MB (= Torque)
L = MB/F