Question

The current generator I_g, shown in figure (38-E19), sends a constant current i through the circuit. The wire cd is fixed and a6 is made to slide on the smooth, thick rails with a constant velocity v towards right. Each of these wires has resistance r. Find the current through the wire cd.

Answer 1

Initial current passing = i

Hence initial emf = ir

Emf due to motion of ab = Bℓv

Net emf = ir – Bℓv

Net resistance = 2r

Hence current passing = (ir - Blv)/2r