When a bar magnet falls through a long hollow | vedclass

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(A) When a bar magnet falls vertically through a long hollow metal cylinder,the magnetic flux linked with the metal tube changes,inducing eddy current

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Equal to zero

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(A) When a bar magnet falls vertically through a long hollow metal cylinder,the magnetic flux linked with the metal tube changes,inducing eddy currents in the tube's body.According to Lenz's law,these eddy currents create a magnetic field that opposes the motion of the falling magnet.This creates a retarding force that increases with the velocity of the magnet.As the magnet falls,the retarding force eventually equals the weight of the magnet $(mg)$.At this point,the net force becomes zero,and the magnet reaches a constant terminal velocity.Since the velocity is constant,the final acceleration of the magnet is zero.

When a bar magnet falls through a long hollow metal cylinder fixed with its axis vertical,the final acceleration of the magnet is

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