Question

A substance has nearly zero resistance at a temperature of $1K$ . What is such a substance called ?

Answer 1

1. Superconductivity is a set of physical properties observed in certain materials where electrical resistance vanishes and magnetic flux fields are expelled from the material.
2. Any material exhibiting these properties is a superconductor.
3. A substance that has nearly zero resistance at nearly $0$ kelvin temperature is called a superconductor.
4. In a superconductor, the resistance drops abruptly to zero when the material is cooled below its critical temperature.
5. An electric current flowing through a loop of superconducting wire can persist indefinitely with no power source.

Therefore, the substance which has nearly zero resistance at a temperature of $0K$ is called as a Superconductor .