Q. 22

A magnetic field

Answer :

Given: - length of the wire AB = d

resistance = R

Velocity = V

moving along the positive direction of x-axis over two parallel wires OX and CD at y=0 and y =d

magnetic field covering the region is

at t=0, AB is at x=0

velocity =

motional EMF in AB =

hence current induced

∴ force needed along is F = BIl

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