|Sep10-12, 11:14 AM||#1|
spin polarized current
How come normal current has a magnetic moment if 50% of electrons have spin up and 50% have spin down. Is it because they have to be in pairs?
Would a wire of current with electrons all polarized up attract a wire next to it with electrons all polarized down?
How come superconductors have no B field by the way?
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|Sep10-12, 12:19 PM||#2|
The magnetic field caused by a current isn't a consequence of electron spin. Any electrically charged particle that is moving will produce a magnetic field.
|Sep10-12, 01:10 PM||#3|
Sorry ignore the first question so again why does a superconductor have no magnetic field inside of it if electrically charged particles are moving.
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