Question

A current carrying loop is placed in a uniform magnetic field . The torque acting on it does not depend on

• A. shape of the loop.
• B. area of the loop.
• C. number of turns in the loop.
• D. strength of the current.

Answer 1

The correct option is A shape of the loop.

Torque acting on a current carrying loop is given by $$\overrightarrow{\tau }=\overrightarrow{\mu }\times \overrightarrow{B}=NIAB\hat{n}$$Clearly, torque doesnot depend upon the shape of loop.

Hence, option (a) is the correct answer.