Question

A copper rod, of length 0.19m, kept parallel to a long straight wire carrying a current of 5A is with a uniform velocity of 10 m/s. The rod is perpendicular to the wire. The two ends of rod are at distance of 0.01m and 0.2m, from the wire, (as shown in the figure). Calculate the emf induced in the rod.

Answer 1

The magnetic field due to the long straight wire, at a distance ‘x’, from it is

This field is directed into the page (downwards). If 'dε ' is the emf induced, over the element ‘dx’ of the rod, we have