Topic: Material Science
The best definition of a superconductor is
- A. It is a material showing perfect conductivity and Meissner effect below a critical temperature
- B. It is conductor having zero resistance
- C. It is a perfect conductor with highest diamagnetic susceptibility
- D. It is a perfect conductor but becomes resistive when the current density through it exceeds a critical value
Answer: A. It is a material showing perfect conductivity and Meissner effect below a critical temperature
Explanation: A superconductor is defined not just by its zero electrical resistance (perfect conductivity) below a critical temperature, but also by the expulsion of magnetic fields from its interior, which is known as the Meissner effect.