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Superconductivity in Thin Films and Nanostructures

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Multiple Choice

What is the critical temperature (Tc) of a superconductor?

  1. The temperature at which the superconductor loses all resistance.
  2. The temperature at which the superconductor becomes a perfect conductor.
  3. The temperature at which the superconductor exhibits a Meissner effect.
  4. The temperature at which the superconductor exhibits a zero resistance.