A conducting square loop of side L and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and into the plane of the loop exists everywhere, with half the loop outside the field. The i…

Question

A conducting square loop of side L and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and into the plane of the loop exists everywhere, with half the loop outside the field. The induced emf is

Accepted Answer

(4) vBL. Only the side inside the field cuts lines; the opposite side is outside, so nothing cancels it. ε=BLv. The resistance fixes the current, not the emf.

Step-by-step solution

Why the other options are wrong