Considering the BCS theory of superconductors, which one of the following state

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Considering the BCS theory of superconductors, which one of the following statements is NOT
CORRECT? (h is the Planck's constant and e is the electronic charge)

Options:

A . Presence of energy gap at temperatures below the critical temperature

B . Different critical temperatures for isotopes

C . Quantization of magnetic flux in superconducting ring in the unit of (h/e)

D . Presence of Meissner effect

Answer: Option C

-NA-

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