Showing posts with label diamagnetism. Show all posts
Showing posts with label diamagnetism. Show all posts

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.