A circular coil having turns and radius carries a current

PHYSICS · Single correct · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism

Problem

A circular coil having

N

turns and radius

r

carries a current

I

. It is held in the XZ plane in a magnetic field

B

. The torque on the coil due to the magnetic field is: (1)

\frac{Br^2 I}{\pi N}

(2)

B\pi r^2 I N

(3)

\frac{B\pi r^2 I}{N}

(4) Zero