Question

What happens to the charge when two capacitors charged in different potentials are connected in series?

Answer 1

For capacitors connected in parallel, Eq. (114) generalizes to . Here, we have made use of the fact that the charge is common to all three capacitors. Hence, the rule is: The reciprocal of the equivalent capacitance of two capacitors connected in series is the sum of the reciprocals of the individual capacitances.