Re: how to transfer energy through the metal wall ??

Assuming the wall's non-magnetic (not steel), you can use an AC magnetic
field as in a transformer. You'll need to think about the field geometry to
minimise eddy current losses due to the wall's conductivity though. Don't
expect high efficiency!

"James Whitby" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Drebbel wrote:
> > [EMAIL PROTECTED] wrote:
> >
> >>Dear all,
> >>
> >>I am doing a project. I would like to transfer several watts of
> >>(electrical) energy through a metal wall (about 1 cm thick) and use
> >>the energy to activate an electric device.
> ...
> >
> > Hmm. why so difficult. Doesn't the metal wall itself transfer
electricity ?
> > Just put some wires directly to the wall.
>
> Short-circuit.
>
>
> -- 
> Dr. James Whitby           Tel: +41 (0)31 6314409
> Physikalisches Institut    Fax: +41 (0)31 6314405
> Universitaet Bern
> Sidlerstrasse 5
> 3012 Bern, Switzerland.
>