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

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The discussion focuses on solving an RL circuit problem to find the current i(t) for t>0. Participants mention using a Wye-Delta transform to simplify the resistors and applying Kirchhoff's current law to calculate the initial current i(0). One user expresses difficulty in calculating i(0) after completing the Wye-Delta transformation. Others suggest determining a differential equation to solve for the transient current through the inductor. The conversation emphasizes the need for clarity on the method to be used for solving the circuit.
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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!
 
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What have you tried? What's giving you trouble?
 
pukeynut said:
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?
 

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