When a bar magnet falls through a long hollow | vedclass

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Question

(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

Vedclass · Accepted Answer

Equal to zero

Vedclass · Answer

(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

Similar Questions

Consider a metallic pipe with an inner radius of $1 \ cm$. If a cylindrical bar magnet of radius $0.8 \ cm$ is dropped through the pipe,it takes more time to come down than it takes for a similar unmagnetised cylindrical iron bar dropped through the metallic pipe. Explain.

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