Razavi Basic Circuits Lec 23: RC Circuit Example; Intro. to Inductors 

The best tutorials as usual.

Compared to regular C-R circuit: vout(t) =V1 exp(-t/τ) u(t); τ = R1C1

before time zero, shouldn't we set the voltage source to an open circuit? after that if we do kvl the 7 V will be on the open circuit