Question

Figure shows a square loop of resistance 1`Omega` of side 1 m being moved towards right at a constant speed of 1m/s. The front edge enters the 3m wide magnetic field (B=1T) at t=0 . Draw the graph of current induced in the loop as time passes. ( Take anticlockwise direction of current as positive )

Answer 1

Correct Answer - A::B::C
For `0 lt t lt 1s, i= Bvl//R=1A` (anticlockwise)
For `1s lt t lt 3s phi= "constant"` so `i=0`
For `3s lt t lt 4s i=Bvl//R= 1 A` (clockwise)
For `t lt 4s i=0`