Question

A square metal wire loop of side 10 cm and resistance 1ohm is moved with a constant velocity v in a uniform magnetic field of induction B =2 Weber meter square. The magnetic field is perpendicular to the plane of the loop and directed into the paper. The loop is connected to a network of resistors each of value 3 ohm. With what speed should the loop be moved so that a steady current of 1milliampere flows in the loop

Answer 1

Blv=0.2×velocity

(0.2×velocity)/resistance =0.001A

So, v=0.00375m/s