Figure below shows a conducting rod of negligible resistance that can slide on a smooth U-shaped rail made of a wire of resistance
1 Ω m−1. Position of the conducting rod at
t=0 is shown. A time dependent magnetic field
B=2T(tesla) is switched ON at
t=0.
At
t=0, when the magnetic field is switched ON, the conducting rod is moved to the left at a constant speed of
5 cms−1 by some external means. The rod moves perpendicular to the rail. At
t=2s, induced emf has magnitude