1.

Assertion: A thin aluminium disc, spinning freely about a centre pivot, is quickly brought to rest when . placed between the poles of a strong U-shaped magnet Reason:A current induced in a disc rotating in a magnetic field produces a force which tends to oppose the disc's motion.

Answer»

both ASSERTION and REASON are both are both wrong
Assertion is right, Reason is wrong
both Assertion and Reasonare correct and Reason EXPLAINS Assertion
both Assertion and Reason are correct, but Reasondoes not explain Assertion

Answer :A


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