A parallel plate capacitor is constructed from two square conducting plates of length L = 0.10 m on a side. There is air between the plates, which are separated by a distance d = 89μm. The capacitor is connected to a 10.0-V battery.
(a) After the capacitor is fully charged, what is the charge on the upper plate?
(b) The battery is disconnected from the plates and the capacitor is discharged through a resistor R = 0.100 MΩ. Sketch the current through the resistor as a function of time t (t = 0 corresponds to the time when R is connected to the capacitor).
(c) How much energy is dissipated in R over the whole discharging process?

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10.0 V