[sdiy] Dr strange no volt!

[M.A. Koot]

Well, I didn't mean "division by zero" but the other way around.
Of coarse, I'm not suprised that this would be a way too simple kind of
solvation, but I just thought, maby Ohm -does- apply on just a part of the
wire. I'm aware of the induction system, naturally.
The thing is, when looking at just a small piece of the coil, that we do
have the elements: current, voltage and resistance. Thus the variables in
Ohm's law must be the the same was my initial thought.
If so, we could say that there is always a certain ammount of resistance in
a wire (I assumed this now, with superconductors it's another case of
coarse).
When there is a little resistance you won't have a division by zero.

U=0, R= x[ohm] I = ?

I = 0/x is not infinity but just zero.

But I can see the relation with inductive coils etc. Ian, I do agree with
your answer about inductive systems. But I actually was thinking about the
fact of only observing a part of the wire, and not the whole inductive
system itself.

cheers,
Michiel

----- Original Message ----- 
From: "Glen" <mclilith at charter.net>
To: "M.A. Koot" <makoot at gmx.net>; <synth-diy at dropmix.xs4all.nl>
Sent: Saturday, August 07, 2004 4:30 AM
Subject: Re: [sdiy] Dr strange no volt!


> At 03:26 PM 8/6/04 , M.A. Koot wrote:
>
> >Interesting discussion, I've heard about having 0 volts and still having
> >currents before, really weird.
> >But when one does look at it straight to the point, Mister Ohm still says
I
> >= U/R.
> >So no matter the resistance: if U = 0, I is also 0!
> >Period. ;)
>
> Not so fast, you're actually defining "division by zero". I've always been
> told that the world has yet to come to a definite conclusion as to what
> division by zero would yield. One suggestion that I've heard is division
by
> zero results in infinity, but I don't know how many people tend to agree
> with that hypothesis. People can't even decide on exactly what the
> ramifications of infinity are, for one thing.
>
> Remember, part of the discussion was whether you could have current flow
> with zero voltage, inside a superconductive loop. Ohm's law sort of breaks
> down in this case, I would think.
>
> So, if you truly had zero resistance and zero voltage, could/would there
be
> current flow in a superconductive loop? If so, how much current? Infinite?
>
>
> later,
> Glen