Ok, that clarifies your point. Except, in Kelly's method, it's not tied to ground at infinity.
The problem is to determine the resistance between two nodes, A and B, which are a finite distance apart. The method injects 1 amp of current at A and grounds B. -- Raul On Sun, Jan 27, 2013 at 6:27 PM, Keith Park <[email protected]> wrote: > Sorry about any misunderstanding. The method involves injecting a current > into one node with the rest of the grid tied to ground at infinity. So one > ampere flows out at infinity. The resistance from the point of injection > to infinity is infinity so the voltage at the injection point is infinity. > > On Sun, Jan 27, 2013 at 5:09 PM, Raul Miller <[email protected]> wrote: > >> On Sun, Jan 27, 2013 at 4:53 PM, Keith Park <[email protected]> wrote: >> > The method of finding the resistance between the two nodes of an infinite >> > grid of resistances (Don&Kathy Kelly) is erroneous. The method fails >> > because a one ampere current flowing into the grid produces an infinite >> > voltage. >> >> What do you mean by this? >> >> Are you claiming that "if one amp were injected into the grid, the >> resulting voltage would be infinite"? That can only happen if the >> distance is infinite, and is really as much an objection to the >> concept of "infinite" as anything else. For a finite separation >> between the two significant nodes, the voltage must be finite. >> >> Or, are you instead saying that the proposed method yields infinite >> voltages for a finite separation? If so, I must confess that I did >> not observe it doing any such thing, and I'd like some explanation >> about how you get that result. >> >> Or did you really mean something else? >> >> Thanks, >> >> -- >> Raul >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm >> > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
