Question

A bar magnet of magnetic moment $\overrightarrow{M}$, is placed in magnetic field of induction $\overrightarrow{B}$. The torque exerted on it is

• A. $\overrightarrow{M}\cdot \overrightarrow{B}$
• B. $-\overrightarrow{M}\cdot \overrightarrow{B}$
• C. $\overrightarrow{M}\times \overrightarrow{B}$
• D. $-\overrightarrow{B}\times \overrightarrow{M}$

Answer 1

Answer: (C)

$\overrightarrow{M}\times \overrightarrow{B}$

Torque is vector product of magnetic moment and the magnetic field.