Perfect conductivity is not enough to explain magnetic properties of a super conductor
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Answer:
superconductors can be defined as a substance which are capable of becoming superconducting at sufficiently low temperatures.Superconductors are very good diamagnets: when a magnetic field is applied on these, eddy current flows in the superconductor result in the inducing of a magnetic field which cancel the effect of applied magnetic field. This is also called as "Meissner Effect".
there are many magnetic properties of super conductors including conductivity and those are
super conductors are perfect diamagnets they can pass critical current , josephon current through them
they can also create magnetic field
hence superconductors cannot be completely designed to only conduct or to work as a conductor they can perform other tasks as well