On Wed, 29 May 2002, Welch, Ken wrote:

>other things to consider -- copper has a positive temp coefficient, which
>means the power dissipation will increase until equilibrium or failure
>
>also, the magnetic field set up in the wire at these current levels can
>actually pull the wires together...

So use two railroad track pieces, each 20ft long, as conductors. They are
too heavy to move and the current capacity should be enough. Cheap too.
Imho don't worry too much about 800A in a single loop moving heavy
conductors. If you'd use say 100 turns at that current, it would begin to
be interesting.

Did anyone see the article about the levitating frog (in a magnetic field)
?

http://www-hfml.sci.kun.nl/froglev.html

Peter

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