PSN-L Email List Message
Subject: Re: copper weight
From: John Popelish jpopelish@........
Date: Tue, 28 Jun 2005 20:06:40 -0400
> You need to keep the edges of the Cu plate well away from the edges
> of the magnetic field - to avoid small magnetic forces.
This is a very good point. The eddy currents circulate around the
spot where the field lines pass through the surface of the metal, when
there is movement. You need some metal outside the concentrated area
of field to make best use of the magnetic field. You can always back
the magnets away from the metal to weaken the field if you have too
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