Question

The torque acting on a magnetic dipole of moment $P_m$ when placed in a magnetic field is

• A. $P_m$B
• B. $\overline{P_m}\times \overline{B}$
• C. $\overline{P_m}.\overline{B}$
• D. $P_m$/B

Answer 1

The correct option is B $\overline{P_m}\times \overline{B}$

Torque $\left(\tau \right)=\overrightarrow{M}\times \overrightarrow{B}$
$=\overrightarrow{P_m}\times \overrightarrow{B}$