the spinning capacitor problem

[William Beaty <billb@ESKIMO.COM>]

On Fri, 25 Jun 1999, Chuck Britton wrote:

> Let's say that the pole piece is actually made of two equal sized disks.
> One covered with an (unknown) positive charge distribution and the other
> with an identical. but negative, distribution.

Yes.  And the "spinning capacitor" problem is similar to the "spinning
magnets" problem. If the two charged plates spin in opposite directions,
we obtain a conventional b-field which has circular lines of flux.  But if
the two plates spin in the same direction, then, in the gap between them,
should they not create a radial magnetic field?


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