What is Meissner Effect?

 The Meissner Effect

    Superconductors which are resistance less materials have an additional property of exclusion of applied magnetic field on it i.e. inside a superconducting material, we always have B=0.


    The property of perfect diamagnetism arises in super conductor because when a magnetic field ‘Ba’ is applied surface screening currents circulate so as to produce a flux density ‘Bi’ which every where inside the metal exactly cancels the flux density due to applied field Bi=-Ba.

For a Super Conductor μr=0; i.e. B=μrBa=0

TThis property of exhibiting perfect diamagnetism by super conductor is known as Meissner Effect.

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