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Re: R = V/I ?



At 11.38 05/05/00 -0700, Leigh Palmer wrote:
I've never considered R = V/I to be anything so general as the
definition of a physical quantity. It is the definition (with
Ohm's law implicit) of a parameter which we call the resistance.
This parameter may apply to many two-terminal devices, notably
to resistors, and it is inappropriate to apply it to devices
which do not obey Ohm's law.

Leigh

But Leigh, would you not say that the (by now overworked) lightbulb has a
well-defined resistance given by R = V/I at every point on the I-V graph?

Mark



_____________________________________
Mark Sylvester
United World College of the Adriatic,
34013 Duino TS, Italy.
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