1. The problem statement, all variables and given/known data Inductor, resistor and a capacitor is connected to a DC source in series. DC source is 220 V Capacitance is 10F Inductance 5H Resistor 22 ohm Vc(0) = 50V Question is asking for the charge time of the capacitor, when it gets charged fully and then it starts to act like open circuit (If I'm not mistaken it must be act like short until gets fully charged and then acts like open circuit) 2. Relevant equations 3. The attempt at a solution I wrote down the KVL and equation. And then replaced the VL with L.dI/dt and I=C.dVc/dt Finally I ended up with a dif. equation on Vc. However, I couldn't proceed any further.