A coil is suspended in a uniform magnetic field, with the plane of the coil parallel to the magn...

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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:
(A) shielding of magnetic lines of force as aluminium is a paramagnetic material.
\( \mathrm{P} \)
(B) electromagnetic induction in the aluminium plate giving rise to electromagnetic damping.
(C) development of air current when the plate is placed.
- (D) induction of electrical charge on the plate
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