CUET · PHYSICS · PYQ PAPER 2025
A bar magnet is released from rest along the axis of a very long, vertical copper tube. After some time, the magnet will
- A stop in the tube
- B move with an acceleration equal to acceleration due to gravity
- C oscillate
- D move with almost constant speed
Answer & Solution
Correct Answer
(D) move with almost constant speed
Step-by-step Solution
Detailed explanation
The falling magnet induces eddy currents in the copper tube, which, by Lenz's Law, create a magnetic field that opposes the magnet's motion. This opposing force increases with speed until it balances the gravitational force, leading to a constant terminal velocity. move with…
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