Question

A conductor at 4.2 K is found to offer no resistance. Such a conductor is called:

विकल्प

• zero conductor

• superconductor

• absolute conductor

• none of these

Answer 1

Superconductor

Explanation:

A substance whose resistance becomes zero below a certain temperature is called a superconductor. Mercury at 4.2 K behaves this way. Zero conductor and absolute conductor are not standard terms.