Circuit with capacitive load
Capacitors which obey the relationship of equation are linear capacitors, since the potential difference among the conductive surfaces is linearly related to the charge on the surfaces. Note that the charges on the right and left plate of the capacitor in are equivalent and opposite. Therefore, if we increase the charge on one plate, the charge on the other plate must reduce by the same amount. This is consistent with our last assumption electrical circuit elements cannot accumulate charge, and current entering single terminal of a capacitor must leave the other terminal of the capacitor.