Assertion :A disc-shaped magnet is deviated above a superconducting material that has been cooled by liquid nitrogen. Reason: Superconductors repel a magnet.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Superconductors are actually diamagneticin nature so when it is placed above a magnet it will be repelled by magnet or it will tend to move from higher field to lower field. This is the principle behind leviation of a superconducting material above magnet.

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