Re: Simple electricity, and yet.....!


"Timo A. Nieminen" <timo@xxxxxxxxxxxxxxxxx> wrote in message
news:Pine.WNT.4.64.0611170535280.716@xxxxxxxxxxxx
| On Thu, 16 Nov 2006, xray4abc wrote:
|
| > jimp@xxxxxxxxxxxxxxxxxxxx wrote:
| >> xray4abc <lemhenyil@xxxxxxxx> wrote:
| >>
| >> <snip>
| >>
| >>> That's true.
| >>> Yet, still we did not answered the question.
| >>> If there is no electric field line(s) along the conductor or a
| >>> Lorentz force exerted INSIDE the conductor,
| >>> then how come that the electrons are drifting along the conductor ?
| >>> In order to sharpen the question, I have considered the case of
| >>> a zero resistance conductor.
| >>> In my opinion, it needs a little bit more than a traditional answer!
| >>> LL
| >>
| >> From a circuit analyses viewpoint, the answer is trivial.
| >>
| >> What you are really asking is why and how does current flow in a
conductor.
| >
| > Yes. I have always thought that the electric field created by
| > the power source was "pushing" the electrons.
| > It seems that there is something wrong with this picture of the
| > process.
|
| What makes aircraft fly at a constant velocity? Thrust = drag. What makes
| a spaceship travel at constant velocity? Thrust = drag must still be true,
| but drag = 0, therefore, one can conclude what?
|
| You're specifically considering the case of R=0. Why should any force be
| needed to keep the electrons moving?
|
| From a circuit analysis viewpoint, it really is trivial. From a Maxwell
| viewpoint, it's less trivial. If you want it to be an educational problem,
| figure out how Maxwell gives you the circuit theory picture. Just keep in
| mind that circuit theory general treats wires as R=0, while in Maxwell,
| their conductivity is not infinite.


What limits the beam current in a CRT?
Thust equals drag?
Permittivity?
None of the above?
It really is trivial.



.

Relevant Pages

  • Re: Simple electricity, and yet.....!
    ... Lorentz force exerted INSIDE the conductor, ... From a circuit analyses viewpoint, ... I have always thought that the electric field created by ... the power source was "pushing" the electrons. ...
    (sci.physics)
  • Re: Simple electricity, and yet.....!
    ... Lorentz force exerted INSIDE the conductor, ... I have always thought that the electric field created by ... the power source was "pushing" the electrons. ... from the source to the resistor. ...
    (sci.physics)
  • Re: Does NEC-2 model wires as solid or hollow?
    ... The electrons ... in the conductor are the carriers and move hardly at ... as vibrating in place, absorbing and emitting photons. ... provides a orientation of a vertical that is tipped sand supplies ...
    (rec.radio.amateur.antenna)
  • Re: Simple electricity, and yet.....!
    ... Lorentz force exerted INSIDE the conductor, ... I have always thought that the electric field created by ... the power source was "pushing" the electrons. ... from the source to the resistor. ...
    (sci.physics)
  • Re: Simple electricity, and yet.....!
    ... power source. ... to the conductor outside the conductor and at its surface too. ... the battery: the full voltage across the internal R, ... The battery is both a ready source of electrons and at the other ...
    (sci.physics)