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A material with zero resistivity is said to have

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A material with zero resistivity is said to have

(a) Zero conductance

(b) Infinite conductance

(c) Zero resistance

(d) Infinite resistance

The question was asked in examination.

Question is from Method of Images topic in section Electrostatic Boundary Value Problem of Electromagnetic Theory

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Right choice is (c) Zero resistance

Explanation: Since resistivity is directly proportional to the resistance, when the resistivity is zero, resistance is also zero. Thus we get zero resistance. The option infinite conductance is also possible ideally, but it is not possible practically. As there is always some loss in the form of heat, thus infinite conductance is impossible, but a short circuit (zero resistance) is practically possible.

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