Response to the following problem:
The switch of Fig. has been open for a long time. It is then closed at t = 0 s.
a. Write the mathematical expression for the current iL and the voltage vL after the switch is closed.
b. Sketch the waveform of iL and vL from initial value to the steady-state level.
![482_The switch.jpg](https://secure.tutorsglobe.com/CMSImages/482_The switch.jpg)