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>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.
>
>He has just recently made a strong case for considering a lightbulb to be
>"a device which does not obey Ohm's law". It seems to follow that it is
>inappropriate to speak of the electrical resistance of a lightbulb. This
>seems to be an idiosyncratic position to take, and I'm interested to see
>how he will extricate himself from this corner.
Please explain the corner I'm in. I believe I implied it is not
appropriate to describe light bulbs by their resistance as they
do not behave like resistors. A VI characteristic is necessary
to describe their behaviour in circuits.