Hello again,
I just want to make sure im getting the same results as you are. There's lots of units named after someone so that doesnt help yet
Thanks.
I didn't say it. Ampere did. Gotta go guys.
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Current does have an instantaneous value, a RMS value, and an average value, as does voltage.
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More backpedalling. Now you are requiring that "current" includes a time component as this is the only way to try to maintain your point.
Current is an instantaneous value, like voltage. Neither requires a time component and the standard unit Amps does not include a time component although Amphours does. This is the most basic electronics, maybe you missed that class.
Now CURRENT flows equally through all parts of a series circuit, inlcuding the battery. More basic electronics. For CURRENT to flow through all parts of a series circuit is is not required for any particular ELECTRON to make it all the way around the entire circuit.
But CURRENT must flow all the way around, THROUGH every component, from battery+ to battery-. And THROUGH the battery too for that matter. Any particular electron may make it completely around the circuit or may not. CURRENT does not care.
If you are being electrocuted; any particular electron that goes in your body may or may not make it out the other side. You don't know. But the CURRENT flows THROUGH your body, no argument.
Current is one of the 2 most important concepts in electronics, and its most defining characteristic is that it goes THROUGH things. Theoretical current as we electronic people rely on goes THROUGH things. No electron movement is required. Just the concept.
I know you are not from an electronics background or you would have easily grasped this most fundamental concept that CURRENT goes THROUGH all components in a series circuit and can be measured with a single ammeter either real or theoretical.
You can focus on physics concepts as to what may happen to individual electrons in a capacitor and its plates but it is irrelevant to my original statement that you tried to correct. CURRENT goes THROUGH the capacitor, and the wire, and the battery.
When I called you out on it you backpedalled once by trying to change to the word "charge" instead of current, and the second time you backpedalled by trying to include definitions of current that also include time.
The fact is that CURRENT flows THROUGH the capacitor, end of story. Whether or not an individual electron does, you can argue out with others because my argument with you has concluded. If you are man enough, feel free to admit you were wrong without any juvenile "yeah.. BUT" disclaimers.
Did you get to read my previous post?
MrAl,
Yes, I did. I was trying to get the ε*µ*dE/dt term to come out to something, but I could not make it happen. When you said "current density", didn't you mean just current? Anyway, as an attachment, I am enclosing the capacitor problem and solution from my book on electromagnetics. Notice the surface integral of the electric flux density has to be calculated to get the displacement current. Hope this helps.
Ratch
BTW, do you have the scan of the equation we have been talking about and if they go about a solution perhaps?
Do they give answers to odd numbered problems tooWould be nice really
MrAl,
In spite of showing how to calculate the displacement current, the book never says that displacement current is real or has a physical meaning.
Ratch
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