I am quite puzzled about charging a capacitor. Given a resistor, in series with a capacitor and a battery, when the switch is closed 1. Why there is a current immediately The capacitor is separated by insulator, hence this is not a closed circuit. The appearance of current seems to be a bit confusing. I thought through this, and conclude that this current is caused by the electronics flow which is for sure due to potential difference. However, when I further think of potential difference, I cannot form a logic explanation to this. The two plates have no potential difference since at the very start it is not charged. How can the electrons flow from a plate to another? I know something has to do with the battery. Could you help me explain more about this? If there is a circuit with battery, switch, resistor, and the wire split at one place, will something happen like what happens in RC circuit Wire has its cross area also, and when they are separated apart, can I imagine it as a capacitor? If so, will it also be the case of charging a capacitor? Thank you for answering all my doubts!!