piracyer
Newbie level 2
I am reading an introductory electronics book. At some point there is this power supply and I couldn't quite understand.
I understand that when the switch is open, the capacitor is getting charged until its full. So electrons concentrate on the bottom side of the capacitor (in the case of this diagram) and positive charges resides on the top side.
However, when the switch is closed, the book says, the capacitor is being discharged by the load. I assume the electrons flow from the bottom of the capacitor to the load through the ground and then go to the upper side of the diagram and go through the switch. (Does the current actually flow through the ground?) However, my another question is, if the current flow through the ground, why doesn't the electricity supplied by the transformer go to the load directly? It seems really confusing when the book suggests the capacitor is being charged and discharged while it looks much more convenient for current from the transformer to go to the load directly and the voltage in the capacitor stays unchanged.
Thanks.