Q. 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
Solution:

Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic flux fields occurring in certain materials, called superconductors, when cooled below a characteristic critical temperature. It was discovered by Dutch physicist Heike Kamerlingh Onnes on April 8, 1911

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