10V
5kΩ
5µF
1µF
20mA
2kΩ

vc(0-) = -10 V ; ic(0+) = -5 mA
vc(∞) = 40 V ; ic(∞) = 0 mA
τ = 12 ms

vc(t) = 40 - 50e-t/0.012 [V] ; t ≥ 0
time for vc to reach 0V: 2.678ms

ic(t) = -10 - 5e-t/0.012 [V] ; t ≥ 0
time for ic to reach 0A: never, but 60ms is close