JEE Main 2023PhysicsMagnetic Properties of MatterMediumMCQ

JEE Main 2023 — Magnetic Properties of Matter Question with Solution

JEE Main 2023 (10 Apr Shift 2)

Question

A bar magnet is released from rest along the axis of a very long vertical copper tube. After some time the magnet will

Choose an option

Show full solutionCorrect option: C
Correct answer
CMove down with almost constant speed

Step-by-step explanation

The flux connected to the copper tube will fluctuate when the magnet moves under the influence of gravity. Eddy currents will be created in the copper tube's body as a result, these induced currents oppose the collapse of the magnet, in accordance with Lenz's law.

A retarding force will consequently act on the magnet. This force will keep rising with the magnet's rising velocity until it equals the force of gravity. The net force acting on the magnet will then vanish. The magnet will therefore reach a steady speed.

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About this question

This is a previous-year question from JEE Main 2023, covering the Magnetic Properties of Matter chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.