1.

Materials having resistance almost equal to zero is _______(a) Semi-conductor(b) Conductor(c) Superconductors(d) Insulators

Answer» The correct choice is (c) Superconductors

For explanation I would say: When the temperature of the material falls to absolute zero, the resistance falls to zero and hence there are no I^2R losses. Since resistance is zero, conductance is almost infinity and hence these materials are known as superconductors.


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