Question

A magnetic field of magnitude 0.450 t is directed parallel to the plane of a circular loop of radius 75.0 cm. A current of 9.00 ma is maintained in the loop. What is the magnitude of the torque the magnetic field exerts on the loop?

Answer 1

Torque=M×B

M=I×A=0.0157

B=0.45T

So torque=M×B=0.007Nm