Question

Two insulated rings, one of slightly smaller diameter than the other are suspended along their common diameter as shown. Initially the planes of the rings are mutually perpendicular. When a steady current is set up in each of them

• A. The two rings rotate into a common plane
• B. The inner ring oscillates about its initial position
• C. The inner ring stays stationary while the outer one moves into the plane of the inner ring
• D. The outer ring stays stationary while the inner one moves into the plane of the outer ring

Answer 1

The correct option is A The two rings rotate into a common plane

The two rings rotate into a common plane till the net torque is zero.