Q 12-06-017NEETJEE MainEasy
A bar magnet is dropped with its north pole down through a horizontal copper ring. As it approaches the ring, viewed from above, the induced current in the ring is
Answer: (C) anticlockwise
Concept. Lenz's law: the induced current opposes the change in flux.
Step 1. Change. The N pole approaches from above, so the downward flux through the ring increases.
Step 2. Opposition. The ring produces an upward field (an N face on top), which seen from above is an anticlockwise current.
Answer. Anticlockwise (Option C).
Solution by Sreeraj P, M.Sc Physics