 In a parallel plate capacitor, capacitance is very nearly proportional to the surface area of the conductor plates and inversely proportional to the separation distance between the plates.If the charges on the plates are +"q" and −"q", and "V" gives the voltage between the plates, then the capacitance "C" is given by

which gives the voltage/current relationship

The energy stored in a capacitor is found by integrating the work "W"