Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics.

---

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ Propeller Head Plaza ]

---

[ Alert Moderator ]

---

Your thoughts please.

Posted by jea48 (A) on February 21, 2014 at 08:49:25

Quote.
ELECTRIC CURRENT IS A FLOW OF ENERGY? Wrong.
Electric current is not a flow of energy; it's a flow of charge. Charge and energy are two very different things. To separate them in your mind, see this list of differences.

An electric current is a flowing motion of charged particles, and the particles do not carry energy along with them as they move. A current is defined as a flow of charge by I=Q/T; amperes are coulombs of charge flowing per unit time. The term "Electric Current" means the same thing as "charge flow." Electric current is a very slow flow of charges, while energy flows fast. Also, during AC alternating current the charges move slightly back and forth while the energy moves rapidly forward.

Electric energy is quite different than charge. The energy traveling across an electric current is made up of waves in electromagnetic fields and it moves VERY rapidly. Electric energy moves at a completely different speed than electric current, and obviously they are two different things flowing in wires at the same time. Unless we realize that two different things are flowing, we won't understand how circuits work. Indeed, if we believe in a single flowing "electricity," we will have little grasp of basic electrical science.

In an electric circuit, the path of the electric charges is circular, while the path of the energy is not. A battery can send electric energy to a light bulb, and the bulb changes electrical energy into light. The energy does not flow back to the battery again. At the same time, the electric current is different; it is a very slow circular flow, and the electric charges flow through the light bulb filament and all of them flow back out again. They return to the battery.

Electric energy can even flow in a direction opposite to that of the electric current. In a single wire, electric energy can move continuously forward while the direction of the electric current is slowly backwards. In AC circuits the energy flows continuously forward while the charges are alternating back and forth at high frequency. The charges wiggle, while the energy flows forward; electric current is not energy flow.

http://amasci.com/miscon/eleca.html#cflow

http://amasci.com/miscon/whatis.html

>>>>>>

Quote.
The speed at which energy or signals travel down a cable is actually the speed of the electromagnetic wave, not the movement of electrons. Electromagnetic wave propagation is fast and depends on the dielectric constant of the material. In a vacuum the wave travels at the speed of light and almost that fast in air.

http://en.wikipedia.org/wiki/Speed_of_electricity

>>>>>>>>>

Up until 2010 I thought I had a pretty good understanding of electricity.
And then I read a thread on Audiogon asking about cable directionality.
Things have not been the same since.
I would really appreciate the views of those with degrees in Physics and or an EE degree.

The Audiogon thread.
http://forum.audiogon.com/cgi-bin/fr.pl?fcabl&1274104190&openusid&zz

My first reaction to Herman's posts was what planet is this guy from.
I searched Google for other Physics links to prove Herman wrong. All I found was more of the same....

>>>>

Here is a thread I posted on recently on Audio Circle.
http://www.audiocircle.com/index.php?topic=122264.0

Jim

Edits: 02/21/14 02/21/14

This post is made possible by the generous support of people like you and our sponsors:

Western Glow Tube Service

---

[ Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2024, Audio Asylum, all rights reserved ]

---

[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]

---