On 10/5/2003 1:07:51 AM, abk511 wrote: >I understand how to find >equivalent resistance, but I'm >having so much trouble with >this problem; I couldn't get >the right answer even though I >spend hours to do this >problem, please help me. > >The picture to the problem is >the attachment > >Find the equivalent resistance >of the circuit shown in the >attachment. > >Thanks, >abk511
The two pairs of resistors
4 ohm + 2 ohm and 6 ohm + 3 ohm should be combined into 6 ohm and 9 ohm respectively. This gives you two "delta" networks.
You'll need to convert one of the deltas into a "wye" configuration. This can be done by considering the equivalent resistance across each pair of connections in the delta with the 3rd connection disconnected and equating that with the equivalent two resistance in the wye network. It's fairly straight-forward. If you run into difficultly, this link shows the correct answer: