Figure shown a square loop of side `l` being moved towards right at a constant speed `v` . The front edge enters th emagnetic field `B` at `t=0` . The width of field is `3l` . Sketch induced emf versus time graph.

Explanation

(a) `t=0` to `t=(l)/(v)` ,
`e=Bvl,I=(e)/(R)=(Bvl)/(R)` , anticlockwise
`t=(l)/(v)` to `t=(3l)/(v)` , `e=Bvl` `I=(e)/(R)=(Bvl)/(R)` , Clockwise