On 7/20/2015 10:43 AM, John S wrote:
On 7/20/2015 8:46 AM, Roger Hayter wrote:
John S wrote:

Correct. And neither is a true short circuit. But, I was sticking to
theoretical conditions rather than getting into how much of a short or
open circuit really is.

Would a superconductor not be a true short circuit? Anyway, I thought
you were specifically talking about what was "possible" rather than
theoretical limits. Your all-purpose 1 W amplifier could have an output
voltage or current than approached infinity as the output load
approached open circuit and short circuit, if you are still talking
theoretically.

I thought I made it clear that we are talking theoretically. If we are,
super conduction is moot. Yes, a source can approach, but not achieve,
infinite voltage or current. Also, as I said earlier, it is not infinite
but is undefined or unbounded mathematically. We call it infinite so we
can wrap our heads around the concept.

We can discuss "possible" rather than theoretical if you prefer. We
would then need to to define how good is a short circuit or an open
circuit and put numbers to them. How do we define the source so that we
agree on its properties? I am eager to discuss these things, so please
present a possible scenario for us to discuss.

So can we all agree that a source can supply a fixed power to a load?

--

Rick