1. The problem statement, all variables and given/known data Conceptually, why is the equivalent charge of a circuit with capacitors in series equal to the charge on one capacitor? For example, the lecture says Q_eq = Q1 = Q2 = Q3 =.... for multiple capacitors in series. Why isn't the equivalent charge the sum of all the charges on the capacitors i.e. Q_eq = Q1+Q2+Q3+...?