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Good point - I don't like it, but we do that with other definitions(eg.,
it is kosher to regard one or more of Newtons "laws" as definitions).
More importantly, if R= V/I is a statement that the resistance is
independent of voltage, where is the definition of resistance (R)?
Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
http://www.velocity.net/~trebor
----- Original Message -----
From: "Robert Cohen" <Robert.Cohen@PO-BOX.ESU.EDU>
To: <PHYS-L@lists.nau.edu>
Sent: Friday, February 08, 2002 10:56 AM
Subject: Re: Ohm's Law
If R=V/I defines the resistance, why do you call it a law?
____________________________________________
Robert Cohen; rcohen@po-box.esu.edu; http://www.esu.edu/~bbq
Physics, East Stroudsburg Univ, E. Stroudsburg, PA 18301
-----Original Message-----
From: Bob Sciamanda [mailto:trebor@VELOCITY.NET]
Sent: Friday, February 08, 2002 10:20 AM
To: PHYS-L@lists.nau.edu
Subject: Re: Ohm's Law
"that the resistance is independent of the voltage [temp, etc held
constant]" is a statement about a property of certain
particular materials.
For me, R=V/I merely defines the resistance of a current
path, in many
useful circumstances; the value of that R may be a function
of many things,
including V.
Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
www.velocity.net/~trebor