[Phys-L] Diamagnetism. Was: Re: Lenz's law

[Bernard Cleyet <anngeorg@PACBELL.NET>]

I understand the high density pencil lead from a particular mfg. Is
sufficiently diamagnetic one may float it above a suitably shaped
neodymium magnet.  I've seen * it, but w/ a much larger block of carbon.
  The demonstrator said the lead worked.

I just discovered this:

http://www.fieldlines.com/other/diamag2.html

* AAPT section at the exploratorium.

bc

John Denker wrote:

> On 04/11/05 22:01, Herbert H Gottlieb wrote:
>
> > However I was wondering
> > if the ring could possibly contain a material that is usually
> > repelled by a strong magnet
>
>
> Sure it could.  Diamagnetic materials exist ... and
> so do paramagnetic materials.  Copper in particular
> is known to be weakly (very weakly) paramagnetic.
>
> The built-in diamagnetism or paramagnetism is in
> addition to (not instead of) the eddy-current
> phenomenon.
>
> You can easily sort out which is which based on
> the time dependence.
>   -- The diamagnetism of the material always produces

cut
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