question_answer

A coil is suspended in a uniform magnetic field. When a current is passed through the coil it starts oscillating. But when an aluminium plate is placed near the coil, it stops. This is due to:

A) development of air current when the plate is placed

B) induction of electrical charge on the plate

C) shielding of magnetic lines of force as aluminium is a paramagnetic material.

D) electromagnetic induction in the aluminium plate giving rise to electromagnetic damping