20V
2kΩ
10µH
5mA
2kΩ

ic(0-) = -10 mA ; vc(0+) = -20 V
ic(∞) = 5 mA ; vc(∞) = 0 V

vc(t) = 0 - 20e-t [V] ; t ≥ 0
time for vc to reach 0V: never, but 25ms is close

ic(t) = -20 - 15e-t [V] ; t ≥ 0
time for ic to reach 0A: 5.493ms