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JEE Physics · Hard

Current Electricity: Superconductivity MCQ

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SuperconductivityHardQuestion 31675

Question

In a superconductor below its critical temperature, electrical resistance is:
  1. A
    Very high
  2. B
    Exactly zero
    Correct
  3. C
    Slightly above zero
  4. D
    Infinite

Correct answer

Exactly zero

Explanation

Superconductors have R = 0 below T_c. Current once established flows indefinitely without any voltage. Cooper pairs experience no scattering.

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