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Explain Meissner effect of superconductivity.

Explain Meissner effect of superconductivity.
When a material makes the transition from the normal to superconducting state, it actively excludes magnetic fields from its interior; this is called the Meissner effect.This constraint to zero magnetic field inside a superconductor is distinct from the perfect diamagnetism which would arise from its zero electrical resistance. Zero resistance would imply that if you tried to magnetize a superconductor, current loops would be generated to exactly cancel the imposed field (Lenz's law). But if the material already had a steady magnetic field through it when it was cooled through the superconducting transition, the magnetic field would be expected to remain. If there were no change in the applied magnetic field, there would be no generated voltage (Faraday's law) to drive currents, even in a perfect conductor. Hence the active exclusion of magnetic field must be considered to be an effect distinct from just zero resistance. A mixed state Meissner effect occurs with Type II materials.


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Mr Akhand Dutta is the Founder and Owner of Civil Engineering With Akhand Dutta (CEWA) and Akhand Dutta Writes. Currently, a civil engineering student at Bipin Tripathi Kumaon Institute of Technology, Dwarahat, Almora, Uttarakhand and has done his …

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