Re: floating aluminium

At 07:05 07/06/2001 +0000, you wrote:

>Art,
>
>That would be fun to watch! I love this list!
>
>Ballendo
>
>In CAD_CAM_EDM_DRO@y..., "Art Fenerty" <fenerty@h...> wrote:
><snip>
> >(eddy currents) and a 1" aluminum plate floats gently down to the
> >bottom of the bore in about 5-10 seconds. Lens law sounds good to me.
> > Art (ok,ok.., enough of this thread.)

I remember from my school physics classes a similar demonstration, but with
an alternating field. The apparatus was a U-shaped iron armature, with a
coil on one arm & an aluminium ring dropped over the other arm. When the
coil was energized with mains AC, the aluminium ring shot upwards off its
arm of the the armature, hitting the ceiling. Great fun!

Regards,
Tony