Initially, a 15uF capacitor is charged by a 100V battery. Once charged, it is disconnected from the battery and connected to two uncharged capacitors(C_2 = 20uF, C_3 = 30uF) in parallel. What is the charge and potential difference on each capacitor. (The two capacitors mentioned above are in series to each other but parallel to the charged capacitor.) So, I found out the Q on C_1 as being 1.5mC when fully charged. Now since they are in parallel the voltage across the two uncharged capacitors is 100V. I find the equivalent capacitor of those two as 12uF and the charge being 1.2mC. Now I am confused about how there is 1.5mC on C_1 but just 1.2mC on the two capacitors in series. Shouldn't the charge across the whole circuit be the same? Or am I mistaken?