CatGut wrote:

"Scott Dorsey" wrote in message ...

I asked:

: So are you saying that the voltage will be present without any current?
:
: If a coil is open, a voltage can be induced in it without current flowing.
: I think that is what he is saying.

I never knew this was possible, but I don't know very much anyway.
I was under the impression that Ohm's law still applied. And if
V = I x R, and if I = 0, then V = 0 too. Like I said, I don't know
much and so this seems confusing.

If that reasoning applied to transformers, it would have to apply to
batteries as well. And yet, I think it's pretty clear that batteries
have a voltage even when nothing is hooked up to them; in fact, it's
a chemical property of them.

- Logan