Apparent is a confusion between electrostatics and electricity. This confusion should not exist on an EE newsgroup discussion where EM fields is a required course. Major difference between charged particles (or plasma) moving through air verses the flow of electrons. Major difference between an EM field verses electric current flow. Sometimes both exist simultaneously. But two charged spheres exchanging charged particles is not electricity. Electricity requires a complete circuit for current to flow.
Even a capacitor demonstrates the principle. A complete circuit is required; else no current flow through capacitor. Therefore even the capacitor, like all current carrying devices, has two ports. An incoming and an outgoing wire both required so that current can pass through the capacitor. Without both, then no current passes through the capacitor. Quite simple concept. Without an incoming and outgoing path, then no electricity flow - as taught even in elementary school science.
Antenna does same thing. Antenna in a circuit only creates current flow when the antenna connects to a complete circuit. How large is that current? One must first provide numbers such as frequency of EM field, size and orientation of antenna, etc.
Same applies to the car. Without both an > Electrostatics:
You claim a capacitor has two ports. Obviously you mean, two leads (it is a one-port device, as you know from your electrical engineering education). I also am aware that they have two leads. I maintain that the leads end on plates (or similar, effectively) inside the capacitor and that the plates are separated by a dielectric. I therefore say there is no complete circuit through a capacitor.
You have stated "Electricity requires a complete circuit for current to flow."
Do you agree that a person can apply electricity to a capacitor, and see current flowing?
If so, I would like for you to tell me where the complete circuit is in a capacitor.
Please answer my questions 1 and 2. Just answer them briefly. #1 you could answer with a yes or a no, I'm just asking whether you agree with the statement.
Maybe you could explain to other engineers that no current flows through a capacitor. I am sure they would be quite surprised. Capacitors have two wires for good reason - electric current flow - an incoming and outgoing path. Other two wire devices are resistors and inductors. Those too conduct electricity only when both the incoming and outgoing paths are in a circuit.
To me, the capacitor discussi> You claim a capacitor has two ports. Obviously you mean, two leads
I could explain it to you, if you ask. I don't know that I need to explain it to any engineers. They probably know how it actually works, and, if they like, they'll use a concept of displacement current in their capacitor-type reckonings if there is any need and it is appropriate and suitable.
I'm not so sure as you are.
Capacitors have two wires for good reason -
It was a relevant distraction, for the purpose of showing you your concepts fail in certain cases. Since you were hanging onto them, and using them as basis to counter stuff I put forth, it was unfortunately a necessary distraction.
If you have a problem with
There are ramifications of these assertions. They seem to be based on an assumption that it is impossible for charge to accumulate anywhere in the universe at any time, and seem to imply that capacitors do not work, nor antennas, for starters.
I was going to show you that your concept "need a complete circuit for current flow" fails in certain situations. It's an assumption we make when appropriate, but set aside when not appropriate. You believe in it too strongly, and, in fact, I see you have attempted to redefine 'electricity' and 'current' and gone to other lengths to avoid having to consider that possibility. You could have learned something here, and come out ahead OR by presenting valid counter arguments to me you could have helped me to learn while sharpening up your own processes. If I recall correctly, you had strong opinions about lightning and its effects and side effects.Someone was askng about a laptop, and, I believe, there was discussion of the type of material a table was made of. I don't recall well, but I thought at the time you had made some valid point(s). How do you figure all that charge builds up in clouds, if there must be charge flowing back out, as soon as any charge flows into a cloud region? We have to be careful when rhuminating on the topic of eletrical goings-on, because our hidden and implicit assumptions sometimes do not hold.
As an example, are you familiar with the problem of feeding motors with high frequeny PWM speed drives, via longish conductor runs? All the usual circuit analysis does not reveal any problem with the setup, yet too many motors fail. When one looks at it from travelling and reflected waves (whose root is the solution of time domain distributed parameter systems), one can explain how a problem occurs. One can, in fact explain the noisy jangly mess which can by recorded by oscilloscopes. But one doesn't get these results by just applying Ohm and Kirchhoff, the normal duo, with the normal methods.
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