Question:
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.
Solution:
F is the force on the free charge particle of PQ.
The motional emf is given as the product of E along the PQ and the effective length PQ.
Therefore, the induced current will be vBd/R which is independent of q.