Which of the following gives the magnitude of torque acting on a coil of turns

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

Problem

Which of the following gives the magnitude of torque acting on a coil of

N

turns, carrying current

I

and of area

A

, placed in a uniform magnetic field

B

when its plane makes an angle

\phi

with the field? (a)

\tau = 2 N I B A \cos \phi

(b)

\tau = N I B A \cos \phi

(c)

\tau = N I B A \sin \phi

(d)

\tau = N I B A