AMEN! Just look what you got us into, Neville! <g>
On Mon, 2008-09-15 at 13:27 -0500, Dan Nave wrote: > You approach this from physics perspective, which will give a complete > (but complex) understanding. > > For the most part, simple electrical circuits may be more easily > understood without referring to the "speed" of electrons. > After all, where is the variable for electron speed in Ohm's law? > > Of course, when we get into actual electrolysis in the CS cell, we have > to ask you about it... ;-)) > > Dan > > > -----Original Message----- > > From: Marshall Dudley [mailto:[email protected]] > > Sent: Monday, September 15, 2008 10:18 AM > > To: [email protected] > > Subject: Re: CS>Thinking about current flow: for Neville > > > > Malcolm wrote: > > > Ummm, > > > > > > On Fri, 2008-09-12 at 15:36 -0005, M. G. Devour wrote: > > > > > >> Dear Neville, > > > > > > The number of electrons inside a wire is constant, and > > independent of any voltage on the wire, it will be equal to > > the number of protons in the nucleus, always. Now if you put > > high voltage on a wire, the number of electrons on the > > surface will vary due to the capacitance effects on the > > surface, but this is trivial compared to the number of > > electrons inside the wire. If what you were saying were > > true, then applying a positive voltage to a wire that is > > grounded would result in a reduction of current as the > > voltage is increased, since that would result in fewer > > electrons in the wire. Ohms law is correct whether the wire > > has a positive voltage or negative voltage on it since the > > voltage on a wire has no effect on the number of carriers > > inside the wire. It only affects their average velocity. > > Think in terms of a pipe with water. > > Adding pressure does not change the amount of water in the > > pipe, except by any little amount the pipe stretches, but > > adding pressure drop from one end of the pipe to the other > > changes the velocity of the water in the pipe, thus the flow > > increases. Voltage equals pressure, current equals flow. > > > > It is actually pretty simply to do the math. An electron > > experiences a pull when in an electric field. This pull is > > the vector product of the voltage gradient and the charge on > > the electron. The electron experiences an acceleration which > > is mathematically equal to this force divided by the mass of > > the electron. However before it has gone far, it bumps into > > an atom, and loses it's velocity, and the kinetic energy is > > converted to heat. This is what give wire resistance. Now if > > you can couple the electrons together into pairs, they can > > actually flow without bumping into the atoms, and that is how > > a superconductor, which has no resistance, works. > > > > Marshall > > > > Marshall > > > -- > The Silver List is a moderated forum for discussing Colloidal Silver. > > Instructions for unsubscribing are posted at: http://silverlist.org > > To post, address your message to: [email protected] > > Address Off-Topic messages to: [email protected] > > The Silver List and Off Topic List archives are currently down... > > List maintainer: Mike Devour <[email protected]> > >
