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Physics · 2026 · 2 marks
CBSE 2026 · Region 5 · Set 3 · Q17
A light copper ring is freely suspended by a light string. A bar magnet is held horizontally with its length along the axis of the ring. The magnet…
A light copper ring is freely suspended by a light string. A bar magnet is held horizontally with its length along the axis of the ring. The magnet is moved towards the ring with its N pole facing the loop. What will happen to the ring and its position ? Explain.
Marking-scheme solution
Current is induced in the ring.
Reason — Due to electromagnetic induction.
The ring will be repelled.
Reason — As per Lenz's law, current is induced in the anticlockwise direction and the magnetic moment associated with this current has north polarity.
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CBSE Class 12 Physics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.