V8meathead Posted August 23, 2006 Report Share Posted August 23, 2006 What's the correct way to use Thevenin's theorem to find the current going through Rs? I keep getting 5mA and it should be 3.33mA. I can't figure out where my problem is. Quote Link to comment Share on other sites More sharing options...
indulis Posted August 23, 2006 Report Share Posted August 23, 2006 Does it have to be with Thevenin's? Try it with a "delta-Y" transformation.......... Quote Link to comment Share on other sites More sharing options...
V8meathead Posted August 30, 2006 Author Report Share Posted August 30, 2006 V8meathead, I know what you're doing wrong:When using Thevenin to determine the current through Rs, you need to find an equivalent thevenin source for the rest of the circuit (the red block), this consists of Vth & Rth. For that you need to figure out the open circuit voltage & short circuit current at the terminals of Rs. 5mA is the SC current; it's not your final answer! Find the thevenin parameters as above & replace the red block with the thevenin equivalent source, then calculate the current through Rs, it is 3.3mA.Ref: Nilsson & Riedel, Electric Circuits 6th edition 2001Ah ha! Thanks, I appreciate it. :D Quote Link to comment Share on other sites More sharing options...
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