I need urgent help on this one.I should first simplify the circuit I guess and may be write an equivalent ressistance.First we have the switch off , and then on.Thanks in advance.

 

Hi,

I would solve this circuit via laplace transformation. You need solve a couple systems of equations obtained via nodal and/or current mesh analysis.

So, rewrite the circuit via laplace transform. Changing inductance to Ls, adding source, etc. Then, write equations with those components. Solve, then do inverse transform.

I have done too many of these in the past, so I will let you take a crack at it.

Steve

 

Solved it on another method. Thanks for the help , your method is easier , but I had someone to explain the other one to me in details