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Materials having resistance almost equal to zero is _______

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Materials having resistance almost equal to zero is _______

(a) Semi-conductor

(b) Conductor

(c) Superconductors

(d) Insulators

This question was posed to me at a job interview.

Question is from Temperature Coefficient of Resistance topic in chapter Simple DC Networks of Basic Electrical Engineering

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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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