Quote:
Originally Posted by H-Man
A capacitor has a resistance (real word is impedance) to an AC waveform. Impedance of a capacitor goes down as frequency goes up.
Longer: If this was a DC voltage, the capacitor would draw current when connected and the current would decrease. If you flip the capacitor around 120 times a second, the DC voltage would have to charge the capacitor 60 times from fully negatively charged to fully positively back to fully negative.
An AC circuit.
May seem like sorcery, but that just explains why every electrical engineer I've ever seen has a beard. |
A capacitor does not have "resistance" as you say. Impedance is not like resistance in that whatever voltage you charge it, one can discharge it as well. The capacitance of AC transmission lines can be balanced to remove the reactive power losses, so it's false to claim that capacitance is responsible for the power loss -- only on unbalanced lines.