Which one of the following statements concerning superconductors is false?
A)Below its critical temperature, the resistivity of a superconductor is zero $\varOmega$-m.
B)Critical temperatures for some superconductors exceed 100 K.
C)All materials are superconducting at temperatures near absolute zero kelvin.
D)A constant current can be maintained in a superconducting ring for several years without an emf.
E)Superconductors are perfect conductors.

Question

Quizplus · Accepted Answer

Not all materials become superconducting at temperatures near absolute zero Kelvin. Only certain materials, called Type I superconductors, exhibit superconductivity at very low temperatures. Type II superconductors can have critical temperatures above 100 K, but not all materials are superconductors at any temperature.

Which One of the Following Statements Concerning Superconductors Is False Ω\varOmegaΩ

Which One of the Following Statements Concerning Superconductors Is False $\varOmega$