1. The problem statement, all variables and given/known data See images In the first image, I made a circuit with the switch closed and then two when the switch is opened. The bottom circuit is the Thev transform. 2. Relevant equations 3. The attempt at a solution Let me first explain my understanding of the circuit. Prior to t = 0, the dc source been suppling a current to capacitor for an lengthy amount of time in which case the cap would reach a 'steady state' of voltage. I decided to find this voltage by using a Thevenin transformation ( 90 V and 6Ω series). vc(0) = 90 V My concern with this is that when I created the new circuit in iCircuit app, the cap voltage only read 30 V..? vc(∞) = 0 V (intuitive understanding of the circuit) In order to find vc(t), I went back to the original circuit and decided to try: Code (Text): v[SUB]c[/SUB](t) = 1/C ∫i dt At this point, I just got lost and wasn't sure how to continue.