Actually Ohm's refers to the potential _difference_ so that if the scalar voltages of each end is increased to decreased by the same amount, and assuming R did not change, then the currents will remain unchanged.
Втр, 04 Окт 2011, Binayak Banerjee писал(а): > Hi, > > I started looking at the Circuit Analysis lab that was included in the J > Software release. However, I'm having a problem understanding the basic > axioms underlying the treatment.. > > 1. The first axiom is that the algebraic sum of the currents flowing into > and out of a "terminal" is 0. I take this as Kirchoff's current law, and > have no issue with this. > > 2. The second axiom states that if the voltage reference is changed, the > current is unaffected. <-- This I don't follow. > > The lab later states that "voltage vectors which differ by a scalar map to > the same current". Again, I'm not sure I follow. > > Given a simple circuit consisting of a resistor, I get (from Ohm's law): > > V = IR. or when V is a function of I, V = f(I). > > Now, if I replace the (say) 10ohm reistor with a 5 ohm one, the same current > maps to twice the voltage. > > Any clarification would be greatly appreciated. I tried sending mail > directly to the author of the lab, but the mail bounced. > > Regards, > > Binayak > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm -- regards, ==================================================== GPG key 1024D/4434BAB3 2008-08-24 gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
