Question

Do Superconductors really have zero resistance?

Answer 1

Conductors are those materials which allow electricity to pass through them. They have free electrons into their molecular structure to carry flow of charge when connected to a dc battery source or voltage.

Complete answer:
Yes, superconductors have zero resistance. A superconductor is a material that can conduct electricity or transport electrons from one atom to another with no resistance. This means current can pass through the material without losing any heat energy.
The critical temperature is the temperature at which the electrical resistivity of a metal drops to zero. At critical temperature the electrical resistance falls to zero suddenly. Conductor works perfectly at a critical temperature. This is incompressible because the flaws and vibrations of the atoms should cause resistance in the material when the electrons flow through it. However, in a superconductor, the electric resistance is equal to zero although the flaws and vibrations still exist.
We can say a conductor can work ideally when we consider superconductivity.

Note:
We can explore many more things related to superconductors or superconductivity. One of the points from it is that superconductors exclude magnetic fields, a phenomenon called the Meissner effect. The disappearance of electrical resistivity was modeled in terms of electron pairing in the crystal lattice by John Bardeen, Leon Cooper, and Robert Schrieffer in what is commonly called the BCS theory.