Discharging a Capacitor: An RC circuit includes a basic switch. In position $"$a$",$ the battery, resistor and capacitor are connected in series, and the capacitor charges. In position $"$b$",$ the battery is replaced with a short, and the capacitor will discharge. Two voltmeters and an ammeter have been added to the circuit.

With the capacitor being charged to some degree, the switch is moved to position $"$b$",$ and the capacitor begins discharging. At any given instant in the process, let II represent the current flowing through the ammeter, and let qq represent the charge that remains on the positively charged capacitor plate. Enter an expression for Kirchhoff's Loop Rule where the sum of the voltage changes totals zero.