[Phys-L] Re: Skin effect??

[Bernard Cleyet <anngeorg@PACBELL.NET>]

If the ring is Al in appearance it may contain Cu to harden (soln.
followed by quench and precipitation)

common alloy is 2024 w/ ~ 4% Cu.


Cu?  well, 99+%

The circulation in one part of the ring is most likely, I think.  Note
transformers are made of thin insulated sheets to reduce eddy current loss.

bc, who thinks everyone knows this already

p.s. A very common demo * is a copper bobbed pendulum passing thru a
PM's gap.  One with vertical slits is compared w/ one w/o.  Even the one
w/o is damped, sl.   (* Even played w/ one in the Moscow Sci/tech museum.)

Herbert H Gottlieb wrote:
> I'm sure that John Denker is correct and I doubt that his reply,
> below, has any flaws in the reasoning.  However I was wondering
> if the ring could possibly contain a material that is usually
> repelled by a strong magnet
>
> Herb
>
>
>
>
>
> On Mon, 11 Apr 2005 19:34:48 -0400 John Denker <jsd@AV8N.COM> writes:
>
> > On 04/11/05 17:49, Mangala Joshua wrote:
> >
> > > I have a question about a demonstration showing  Lenz's Law. While
> >
> > a ring is hanging  if we bring a fairly strong magnet towards it the
cut
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