Question

A metallic rod $CD$ rests on a thick metallic wire $PQRS$ with arms $PQ$ and $RS$ parallel to each other, at a distance $l=40cm$, as shown in following figure. A uniform magnetic field $B=0.1T$ acts perpendicular to the plane of this paper, pointing inwards (i.e., aways from the reader). The rod is now made to slide towards right, with a constant velocity of $v=5.0m{s}^{-1}$.
How much emf is induced between the two ends of the rod $CD$?

Answer 1

Induced emf$=e=Bvl=0.1\times 5\times 0.4=0.2volt$