Question

A coil carrying electric current is placed in a uniform magnetic field with its axis making a nonzero angle $\theta$ with the field, then

• A. torque is applied on the coil
• B. emf is induced
• C. both (a) and (b) are correct
• D. a net force acts on the coil

Answer 1

The correct option is A torque is applied on the coil

Due to rotating current in the coil, a magnetic moment $M$ is produced.
The torque exerted on the coil=$\overrightarrow{M}\times \overrightarrow{B}=MB\sin \theta \ne 0$ for $\theta \ne 0$.