20mA
5kΩ
5µH
1µH
1V
2kΩ

ic(0-) = -20 mA ; vc(0+) = -40 V
ic(∞) = 0.5 mA ; vc(∞) = 0 V

vc(t) = 0 - 40e-t [V] ; t ≥ 0
time for vc to reach 0V: never, but 2.083ms is close

ic(t) = -40 - 20.5e-t [V] ; t ≥ 0
time for ic to reach 0A: 1.547ms