Solve RL Circuits Problem: Find i(t) for t>0

[pukeynut]

Homework Statement

For the circuit shown, find i(t) for t>0
http://img440.imageshack.us/img440/5158/cicuit.jpg

Homework Equations

To simplify the resistors we use a Wye-Delta transform so:
R1 = RbRc/(Ra+Rb+Rc)
R2 = RcRa/(Ra+Rb+Rc)
R3 = RaRb/(Ra+Rb+Rc)

Then the Kirchoff current law on the nodes to calculate i(o).

The Attempt at a Solution

I can do the Wye-Delta transform no problem, but am having serious trouble in calculating i(o). After that it's a fairly straightforward problem.

Any help would be massively appreciated!

 

[gneill]

What have you tried? What's giving you trouble?

 

[NascentOxygen]

For the circuit shown, find i(t) for t>0.

Will you be determining a differential equation, then solving it, to find the transient current through the inductor? Or what method will you be using?