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Really?

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In Reply to: RE: Really... posted by jea48 on February 21, 2022 at 10:12:39

It depends on what you think the energy is and what you think the signal is. I've been trying to get a straight answer out of you on this for years. Your response is always to quote your hero. You did it again. But no one ever said the signal is carried outside the conductor. Only the energy or energy flux.
What we know is the Poynting vector travels outside the conductor but the Poynting vector is not the signal. The units of Poynting vector are Watts per meter squared. It's the energy flux. Hel-loo! Does that look like a signal to you? Really? Is the signal the electric field? The magnetic field? They are outside the conductor too. What is the signal? That's what I'm asking you.

Edits: 02/22/22 02/22/22

Follow Ups:

RE: Really? - jea48 12:07:23 02/23/22 (3)
The signal is the EM wave. The signal EM wave transfers the energy from the source to the load at near the speed of light, in a vacuum. Though the speed of the EM wave signal is limited by the dielectric insulating material used covering the bare conductor. Do you suppose that might explain why the type of insulation used to cover the bare conductor can have an effect on the sound of ICs and speaker cables?

The signal does flow in a conductor at near the speed of light. The signal energy does not flow in the conductor at near the speed of light.
The signal EM wave travels through the dielectric space between the conductors.

You have yet to explain how the signal travels in the conductor at near the speed of light. It doesn't... The AC signal in the conductor vibrates and hardly moves at all in the wire. You know that...
- RE: Really? - geoffkait 12:57:54 02/23/22 (2)
  For most audio cables there is one conductor per side, + and -. The electrons move in one direction on one conductor while simultaneously moving in the opposite direction on the other wire. Electrons switch direction according to the alternation rate of the audio waveform. It's the alternation of electron flow that ultimately produces sound in speakers, that moves the diaphragm back and forth.
  Even though electrons move very slowly they change directions very rapidly, according to the instantaneous audio waveform, 20-20k Hz. That's why I said somewhere recently electrons travel only about a millionth of an inch at a time. In any case, this is the core of the audio signal in cables, the alternating electron motion on both + and - conductors, which in turn creates moving charges, I.e., current.
  The audio waveform of course originates at the source and is amplified along the way. The electrons do a little dance, the wiggle wiggle dance, to the tune of the audio waveform.
  Alternating current and alternating voltage produce the magnetic fields and the electric fields, . The Poynting vector is simply the cross product of those two fields. The Poynting vector also alternates direction along with the audio waveform. You can forget about speed of light. That is only a red herring. In fact, this discussion is really about low speed physics, not high speed physics since electrons move only about a meter per hour.
  
  Edits: 02/23/22 02/23/22 02/23/22
  - Ralph Morrison would strongly disagree... - jea48 13:34:00 02/23/22 (1)
    You are flat out wrong...
    Click on the Link provided below.
    Download full-text PDF
    Understanding Electricity and Circuits:
    What the Text Books Don't Tell You
    Ian M. Sefton
    School of Physics, The University of Sydney
    You will have to copy and paste the link.
    https://www.researchgate.net/publication/255626544_Understanding_Electricity_and_Circuits_What_the_Text_Books_Don't_Tell_You
    
    Edits: 02/23/22 02/23/22 02/23/22 02/23/22
    - Actually he agrees with me - geoffkait 17:07:24 02/23/22 (0)
      This guy agrees with me. Thanks for sharing! Eventually you'll find someone who agrees with you, like the monkey at a typewriter writing the plays of Shakespeare. Does your new hero talk about audio cables or the audio signal at all in his paper? I assume your answer is no. I suspect you should probably at this point figure out what I mean by the "audio signal" in cables or what is meant by the word "signal" in audio cables before proceeding any further. And figure out the difference between signal and Poynting vector. Otherwise this is going to be a goat rope. I have some trained deprogrammers standing by.
      
      Edits: 02/23/22

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