India Site

Find the current in the wire for the configuration. Wire PQ has negligible resistance. B, the magnetic field is coming out of the paper. θ is a fixed angle made by PQ travelling smoothly over two conducting parallel wires separated by a distance d.

F is the force acting on PQ’s free charge particle.

The motional emf is calculated by multiplying E along the PQ by the effective length of the PQ.

As a result, the induced current will be vBd/R, regardless of q.