Re: Another use for rare earth magnets

On Apr 16, 2:35 pm, Dan_Thomas_nos...@xxxxxxxxx wrote:
On Apr 16, 8:26 am, Rob Skinner <rskin...@xxxxxxxxxxxxx> wrote:



That is not really true. Consider a permanent magnet generator. The
magnet is spinning within what? A coil of copper wire. Magnets affect
more than just ferrous materials.

The magnet, in this case, is affecting electrons within the
metal. Anything conductive will respond to magnet movement. The key is
movement: the field has to be cutting through a conductor to generate
electron flow, and whether it's the field that's moving through the
conductor (as in an alternator) or the conductor moving through the
field (as in a generator) the result is the same. No movement equals
no electron flow generated.
The magnet hovering over a superconductor assumes that a
current was stimulated within the superconductor in the first place.
The hovering magnet cannot do that, since there is no field movement.
Nothing is free.

Dan


I always thought the act of bringing the magnet into place over the
superconducter was what created the current in the superconducter.

Dave

.

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