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A fundamental electronic component that stores energy in an electric field, commonly used in filtering applications.

2
votes
1answer
Capacitors are often approximated as infinite conducting plates. I find this approximation surprising since the capacitors I've seen in circuits are only a few centimetres big. For all the derivation …
asked Feb 9 '14 by dfg
8
votes
7answers
A parallel plate capacitor consists of two parallel conductors with opposite charges. In the above diagram, the wires are parallel and conductors so do they act as capacitor plates? If they do, if … you have two wires right beside each other, and connect a capacitor to the end, would the capacitor still charge as much? Since the whole thing acts as one big capacitor, the charge wouldn't just …
asked Jan 31 '14 by dfg
1
vote
3answers
Say I have a parallel plate capacitor that has a vacuum between the plates and has electric energy U. If I then add in a dielectric between the plates while the capacitor is charged, the electric …
asked Feb 4 '14 by dfg
2
votes
4answers
Capacitors in series have identical charges. We can explain how the capacitors end up with identical charge by following a chain reaction of events, in which the charging of each capacitor causes … the charging of the next capacitor. We start with capacitor 3 and work upward to capacitor 1. When the battery is first connected to the series of capacitors, it produces charge -q on the bottom plate …
asked Feb 4 '14 by dfg
2
votes
5answers
The reason underdamped LRC circuits oscillate is because the energy keeps flowing between the inductor and capacitor. The energy is being constantly exchanged between the capacitor and inductor … circuits don't oscillate? Why isn't the energy being exchanged back and forth between the capacitor and inductor? …
asked Oct 26 '14 by dfg
2
votes
3answers
My textbook is trying to explain why adding in a dielectric between two conductors causes a change in the field inside. They provide the following image: I don't understand how the second image is …
asked Feb 4 '14 by dfg