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

Reason : Superconductors repel a magnet.

  • If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
  • B
    If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
  • C
    If the Assertion is correct but Reason is incorrect.
  • D
    If both the Assertion and Reason are incorrect.

Answer

Correct option: A.
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
a
Superconductors are actually diamagnetic in 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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