Re: delta V = I R

[Bob Sciamanda <trebor@VELOCITY.NET>]

The correct parallel would be to: definition of resistance:  R=V/I.  Ohm's
law (peculiar to Ohmic materials): R = a constant.
A parallel:  def of thermal coeff of linear expansion: alpha = (dL/L)/dT.
Schwartz' law for linear materials: alpha = constant.

Bob

Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
http://www.velocity.net/~trebor

----- Original Message -----
From: Michael Edmiston <edmiston@BLUFFTON.EDU>
To: <PHYS-L@lists.nau.edu>
Sent: Monday, November 08, 1999 10:16 AM
Subject: Re: delta V = I R


> We do this type of thing all the time.  PV = nRT is the ideal gas law.
>  It applies to any gas which is behaving ideally.  If the gas is not
> behaving ideally, then PV = nRT does not apply.
>
> Likewise, delta-V = IR applies to devices that are behaving in an ohmic
> manner.  If the device is not ohmic, then this equation does not apply.
>  Is that too complicated?  If so, is PV = nRT too complicated?
>
> Michael D. Edmiston, Ph.D.              Phone/voice-mail:
419-358-3270