Question

what happens when a coil with out current is made to rotate in magnetic feild?

Answer 1

Electricity is produces till it is in motion. Until and unless it is in rest electricity will be not produced

Answer 2

When we place coil in magnetic field then magnetic field lines will passes through coil hence the no of lines passes through the coil same unit we are not disturbing coil as well as magnetic field means magnetic flux remain constant And when we rotate ring then no of lines passes through the coil will changes again and again means magnetic flux will change which is the reason of conduction of current. Note:- change in the magnetic flux is the cause of conduction of current When there is closed coil then current will produce and when open coil is there then emf will produce.