LarryS
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- Do the electrons come from that part of the conducting wires that is very CLOSE to the capacitor?
Given a DC circuit consisting of a battery, a switch and a parallel plate capacitor and no resistor. The wires are relatively thick copper. Also, the copper wire leads into the capacitor are each, say, about one meter long. Now when the capacitor is fully charged, the negative plate will contain extra electrons. I’m trying to visualize WHERE those extra electrons actually come from. I’m thinking that they must come from that part of the copper leads that is VERY CLOSE to the capacitor. The charging time of the capacitor is very fast because of the low resistance. Therefore they cannot come from the battery or the leads that are close to the battery because the drift velocity of the electrons is very slow and the length of the copper leads is long (one meter).
Am I right? Is the capacitor supplied electrons from that part of the copper leads that are very close to it?
Am I right? Is the capacitor supplied electrons from that part of the copper leads that are very close to it?