Question

Predict the direction of induced current in metal rings 1 and 2 when current $I$ in the wire is steadily decreasing?

Answer 1

By Right hand thumb rule the direction of magnetic field through ring 1 , due to current in wire will be perpendicular inward into the plane of paper . Now according to Lenz's law , as the current is decreasing in wire , the direction of induced current in ring 1 will be such that , it should oppose the decrement of current in wire , for that upper face of ring 1 will be a south pole . If upper face is south then direction of current in ring 1 is clockwise .

Due to same reason the direction of induced current in ring 2 will be anticlockwise .