Question

what is superconductor?explain

Answer 1

Every conducting substance will have some resistance which opposes it's conductance and the energy come out in the form of heat. So a conductor which have zero resistance is called a superconductor

Answer 2

Superconductivity is a set of physical properties observed in certain materials where electrical resistance vanishes and magnetic flux fields are expelled from the material. Any material exhibiting these properties is a superconductor.