First slide

Magnetic dipole in a uniform magnetic field

Question

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

Easy

A

$M B / F$
B

$B F / M$
C

$M F / B$
D

$F / M B$

Solution

Torque experienced by the bar magnet = MB = F.l

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