A coil is suspended in a uniform magnetic field, with the plane of the coil parallel to the magnetic lines of force. When a current is passed through the coil, it starts oscillating. It is very difficult to stop, but if an aluminium plate is placed near to the coil, it stops. This is due to

Question

A coil is suspended in a uniform magnetic field, with the plane of the coil parallel to the magnetic lines of force. When a current is passed through the coil, it starts oscillating. It is very difficult to stop, but if an aluminium plate is placed near to the coil, it stops. This is due to, induction of electrical charge on the plate., shielding of magnetic lines of force as aluminium is a paramagnetic material., electromagnetic induction in the aluminium plate giving rise to electromagnetic damping., development of air current when the plate is placed.

MARKS App · Accepted Answer

When an aluminium plate is placed near to the coil, electromagnetic induction in the aluminium plate gives rise to electromagnetic damping that helps to stop the motion.

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