shows a long U shaped wire of width `l` placed in a perpendicular magnetic field B. A wire of length `l` is slid on the U shaped wire with a constant velocity v towards right. The resistance of all the wires is r per unit length. At t =0, the sliding wire is close to the left edge of the U shaped wire. Draw an equivalent circuit diagram, showing the induced emf as a battery. Calculate the current in the circuit.

Explanation

Since `e=Bvl `
`Resistance =rxxTotal length.`
`=ixx2(l+vt)`
`=2r(l+vt)`
`i=(bvl)/(2r(l+vt))`