Superconductor is an object which has (a) Maximum resistance (b) Zero resistance (c) Unlimited resistance (d) Negative resistance

The high-temperature superconductors are 1 Metal alloys 2 Ceramic oxides 3 Inorganic polymers 4 Pure rare earth metals

. A superconductor is a a.) A material showing perfect conductivity and Meissner effect below a critical temperature b.) A conductor having zero resistance c.) A perfect conductor with highest di-magnetic susceptibility d.) A perfect conductor which becomes resistance when the current density through it exceeds a critical value

BSNL,

A superconductor is a

Bhel,

What is the significance of superconductors?