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Superconductivity is a material property associated with

  • A.Cooling a substance without a phase change
  • B.Frictionless liquid flow
  • C.A loss of thermal resistance
  • D.A loss of electrical resistance

Answer: D

Superconductivity is the complete loss of electrical resistance that some materials show below a critical temperature.

A current started in a superconducting ring will circulate indefinitely without loss. The effect was discovered by Kamerlingh Onnes in mercury in 1911, at 4.2 K.

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