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arul_k
#3
Nov25-12, 11:32 AM
P: 79
Quote Quote by sophiecentaur View Post
The induction occurs when the conductor is initially brought towards the magnet (or if the field is 'switched on'). With a superconductor, the induced current just does not die away.
Thanks sophiecentaur for your reply. I am aware that a varying magnetic field is required to induce a current in a conductor, however in the case of super conductors this dosen't seem to be so.
For example in some of the videos that demonstrate the Miessner effect a permanent magnet is placed on top of the super conducting surface, there is no relative motion or changing flux between the magnet and the superconductor, yet when the superconductor is cooled down, a current is induced in it, which as you have stated does not die away.

My question is how can a non varying magnetic field induce a current in the super conductor?