Explain about super conductor materials with respect to their mag… - Vidyadip

Question

Explain about super conductor materials with respect to their magnetic properties.

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Answer

→Super conductors are most exotic diamagnetic materials.
→Basically they are metals, cooled to very low temperatures which exhibit both perfect conductivity and perfect diamagnetism. When such materials are placed in magnetic field, all field lines are completely expelled. Hence, the magnetic field inside the substance $B =0$.
→For super conductors, susceptibility $\chi=-1$ and hence $\mu_r=0$.
→A super conductor repels a magnet and is repelled by magnet.
→The phenomenon of perfect diamagnetism in super conductors is called the Meissner effect, after the name of its discoverer.
→Super conducting magnets are used in variety of situations. For example, for running Mag-lev (magnetically levitated) superfast trains.

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