1. The problem statement, all variables and given/known data Three capacitors, of capacitances C , 2C and 3C respectively are connected in this order in series to a voltage U battery. After they are charged, the middle capacitor (2C) is disconnected and then connected back again with reversed polarity. Find the charges on each of the capacitors after this process. 2. Relevant equations 3. The attempt at a solution The equivalent Capacitance [itex]1/C_a = 1/C + 1/2C + 1/3C[/itex] [itex]C_a = 6C/11[/itex] and the charge on every capacitor is [itex]q_a=UC_a=6CU/11[/itex] now i'm stuck, i don't know what happens after the disconnection.