The Student Room Group

Capacitance

Hi
I was having some trouble understanding why the two plates of a capacitor are charged, as even if there is an electron deficit in a plate due to electrons being knocked off it, there are also electrons knocked off from the other plate (as current is flowing through both the plates) which enter the former plate. Could someone please help me with this?
Reply 1
The current that appears to flow through a capacitor is just electrons flowing onto one plate and off the other plate.

You only see current appearing to flow through a capacitor when the pd across the capacitor plates is changing over time e.g. during charging from a DC source or if connected to AC.
There is no elctrical connection between the plates.
Reply 2
Original post by Joinedup
The current that appears to flow through a capacitor is just electrons flowing onto one plate and off the other plate.

You only see current appearing to flow through a capacitor when the pd across the capacitor plates is changing over time e.g. during charging from a DC source or if connected to AC.
There is no elctrical connection between the plates.

Ok, that makes sense. Thanks!

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