Capacitors C1 and C2 are connected in series and a potential difference is applied to the combination. If the capacitor that is equivalent to the combination has the same potential difference, then the charge on the equivalent capacitor is the same as: the difference of the charges on C1 and C2 the product of the charges on C1 and C2 the charge on C1 none of the above the sum of the charges on C1 and C2