What actually flows, current electricity or charge?
This is my answer to SE EE question What actually flows, current electricity or charge ? My answer To intuitively understand circuits, it is enough to realize that something like a pump (source) produces something like pressure (voltage) that causes something like fluid (electric current) to flow from where it is a lot (the positive source terminal) to where it is a little (the negative terminal) encountering obstacles (resistance) on its way. Then we need to realize what the connection between these pressure-like, flow-like and impediment-like quantities is (Ohm's law) and to see where currents flow (topology). Finally, it remains to be seen (in a most general way) what the basic circuit idea is.