I've always wondered why is it possible for charge to flow in an open circuit, e.g., when a terminal is connected to a grounded pole, a large metal chassis, or say a water pipe. I've assumed that it's because there is a positive potential difference between where the charge is and the large conductive body, and so its potential energy is dissipated in moving towards the conductive body which thus creates current. The circuit can remain open, with no return path, since there is no charge buildup as there would be on say a parallel plate capacitor. Are these thoughts correct? Any further insight into the matter? I noticed that it seems that this is how Leyden Jars were originally charged, the outer foil on the jar had no return path. Please let me know if I'm wrong regarding this as well.