Say you have a superconducting loop of copper. If there's an increasing magnetic field through it that induces an E field around the loop, how are the electrons moving when the field stops increasing? As I understand it the current is preserved. Is there some way to calculate the energy possessed by the electrons using the magnetic energy density? Could we take it a step further and calculate the speed that the electrons are moving by the kinetic energy equation? I suspect this a quantum mechanical problem that transcends the classical picture of electrons moving.(adsbygoogle = window.adsbygoogle || []).push({});

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# Current in superconductors

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