A bar magnet of magnetic moment M, is placed in a magnetic f... | Physics | SolveeIt

A bar magnet of magnetic moment M, is placed in a magnetic field of induction B. The torque exerted on it is

$M\times B$

$-B\cdot M$

$M \cdot B-$

$M \cdot B$

Answer

$M\times B$

Explanation

When a bar magnet of magnetic moment M, is placed in a magnetic field of induction B, then net force on it is
$F_R = mB + (-m )B = 0$

while torque
$\tau = mB \times 2lsin\, \theta = MB \,sin \,\theta$
i.e. $\tau=M\times B$

Physics Question on Magnetism and matter