On Thursday, Apr 15, 2004, at 14:26 US/Pacific, Rick Regan wrote:

> Could you elaborate on how you can produce current, and
> how you can do so keeping R and V constant?

Don't forget that at the time Ohm's law was derived, I don't think that
"real" constant voltage sources were any more common than "real"
constant current sources.  Our thinking is a bit skewed by the fact
that voltage regulators are so ubiquitous NOW.

Originally, you'd probably think of I and V as measurable quantities,
and R as the way to relate the measurements.  NOT varying V to get a
different current through a resistor...

BillW

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