[sdiy] Dr strange no volt!

[karl dalen]

 --- Ian Fritz <ijfritz at earthlink.net> skrev: 
> At 03:45 AM 8/6/2004, Glen wrote:
> >At 09:18 PM 8/5/04 , karl dalen wrote:
> >
> > >Is it possible to have a flow of current at 0V?
> > >Is it possible to have current but no voltage?
> > >Is it possible to have voltage but zero current?
> >
> >The answer to the last question is yes. For example if you open a switch,
> >the voltage is still present on each terminal, but there is no current
> >flow. (For all practical purposes.)
> >
> >The answers to your first 2 questions is normally no, -- but
> >superconductivity, quantum mechanics, or some other exotic technology might
> >say other wise. I'm no expert in those fields.
> 
> A time varying magnetic flux through a closed loop of wire will produce a 
> current in the wire. This is Faraday's law of induction. Not exotic at all, 
> just straight classical E&M.  Of course this would not be relevant to a 
> voltage regulator IC.

Asuming a superconductor of zero ohm as loop then, if ohm
present, i.e. copper, there would be a small voltage present!

KD

Höstrusk och grå moln - köp en resa till solen på Yahoo! Resor på adressen http://se.docs.yahoo.com/travel/index.html