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Re: Controversial Exam Questions (WAS: R = V/I ?)



I think everybody knows what is going on with a lamp filament by now,
but now we need to decide what Ohm's Law is. I would say that Ohm's law
states that a wide variety of materials have the property that their
resistance is constant if they are held at a constant temperature. If
this were put to the test so that the filament of the bulb could be kept
at constant temperature I would suppose that its resistance would be
well defined and very nearly constant.
WBN

Barlow Newbolt
Professor of Physics
Washington and Lee University
e-mail: newboltw@wlu.edu
telephone: 540-463-8881
fax: 540-463-8884
Office: Howe 218

"Had I been present at the creation, I would have given
some useful hints for the better ordering of the universe."

Alphonso X, Learned King of Spain (1252 - 1284)