 
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
|
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
98.169.214.23
In Reply to: RE: "How electricity flows in an AC circuit" posted by tomservo on November 05, 2022 at 07:42:21
From paragraph in my original post,"The signal does not travel in the center conductor."
"The signal travels in one direction only, from source to the load."Please comment.
Edits: 11/05/22 11/05/22 11/05/22Follow Ups:
So perhaps we are talking about two different views, a more conceptual one, like the signal travels in one direction from the source through the system, to the speaker.
What i am talking about is how that "signal" is transferred via wires as a current and voltage through two paths or a pair of conductors to the loudspeaker. Where the current that makes the voice coil move and produce sound is traveling equally in both conductors but in opposite directions and if a coax is used, equally on the inner and outer conductors.
To have a complete circuit, where a signal can be transferred electrically, you need both paths, with AC like audio one is positive when the other is negative. "Ground" is often used for one of those paths.
The paragraph I quoted was mixed up to a certain extent. That paragraph was actually referring to the energy contained in e and B fields located outside the conductor. The Poynting vector energy flux points in the direction of free electron motion. Current and voltage are scalar quantities so they do not travel or have any direction. What does travel and have direction are the free electrons, the moving charges. Free electrons are physical entities whereas current and voltage are not. This will become important on discussions of directionality.
Edits: 11/07/22 11/07/22
AC does flow back and forth in a coax cable or it would not be AC.
Current doesn't flow back and forth, technically speaking. Current is a scalar quantity, it has no direction, it has no velocity, it's calculated according to amount of free electron flow, total charge per unit time. Only the free electrons move back and forth in an AC circuit. The picture of how electricity works is further complicated by adding the concept of Poynting vector and energy flux outside the conductor in electric and magnetic fields. Having said that we're stuck with common occurrence of term, "alternating current."
Edits: 01/17/23 01/17/23 01/17/23
| FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
||||||||||||||
This post is made possible by the generous support of people like you and our sponsors:
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
