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Re: Ohm's 'law' & minus sign

----- Original Message -----
From: "Robert Cohen" <Robert.Cohen@PO-BOX.ESU.EDU>
To: <PHYS-L@lists.nau.edu>
Sent: Tuesday, February 11, 2003 4:04 PM
Subject: Re: Ohm's 'law' & minus sign


On the other hand, can we start with E =3D rho j (which is
a vector relationship) and replace E with - Del V,
rho =3D AR/L, and I =3D JA, to get a vector equation
with Del V, L, R and I? In that case, the vector
equation would necessarily have a minus sign, no?

I think so, too.

Paolo Cavallo