Re: Where is the electric current in a permanent magnet?
- From: PCB <yoshioory@xxxxxxxxxx>
- Date: Sun, 11 May 2008 09:36:34 -0700 (PDT)
On May 11, 6:02 pm, Tom Roberts <tjroberts...@xxxxxxxxxxxxx> wrote:
PCB wrote:
I read somewhere that only electric currents generate magnetic fields.
That is incorrect. The intrinsic spins of elementary particles also
produce magnetic fields.
Where is the electric current in a permanent magnet?
There is none.
Is a permanent magnet a frozen electric current in matter?
No.
It seems that the electric current in a magnet would like to flow, but
it cant.
No. Iron is conductive, as are most other permanent magnets.
The bulk magnetization of a permanent magnet is due to the alignment of
spins in the constituent atoms. This cannot be understood classically,
QM is required.
Tom Roberts
But sir, QM is false, never makes accurate predictions.
QM only probably will make a prediction, but probably not. I learned
that if a theory does not always make a predicted prediction, always,
than that theory is false, or at best useless.
So the question still remains untouched, and I have a permanent magnet
which is not a conductor at all.
What alignment of spins? You mean synchronization of electron spins?
Because the atoms are still round in a permanent magnet, you cant
align somthing which is round.
You need something to be elongated in order to align them.
Am I wrong? Where?
.
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