# Total resistance in parallel/serial hybrid circuit

Discussion in 'Homework Help' started by Ulfalizer, Jul 10, 2005.

1. ### Ulfalizer Thread Starter New Member

Jun 29, 2005
5
0
How do I calculate the total resistance in the following circuit? I can't find any way to break it up into strictly parallel, serial parts while keeping the resistor terminals that should be electrically common so.

Code ( (Unknown Language)):
1.
2.  |----------------|
3.  |        |
4.  |       /  \
5.  |       /   \
6.  |      r1    r2
7.  |      /     \
8. v1     |-----r3-----|
9.  |      \     /
10.  |      r4    r5
11.  |       \   /
12.  |       \  /
13.  |        |
14.  |----------------|
15.
The r components are resistors and the v component is a voltage source. Make up whatever numbers you wish for the voltage and resistances, I'm only interested in how you solve it.

Any help appreciated,
Ulf

2. ### hgmjr Moderator

Jan 28, 2005
9,030
214
Hi Ulfalizer,

You have come to a great place to pose that question. AAC has a terrific tutorial on this very subject. One way to solve this type of problem is to use the wye-to-delta conversion. This technique is well covered in the tutorial. Just follow the link below to access the material.

Y to delta conversion

hgmjr

3. ### Ulfalizer Thread Starter New Member

Jun 29, 2005
5
0
Thanks! Those equations weren't even that hard to derive from the fact that the resistance between any two terminals should be the same in both forms. Not that I would have thought of it in the first place

Ulf

4. ### abbas_6007 New Member

Sep 7, 2009
5
0
Hello.
i am a new member and i want to give u answer frm my mind.
first multiply all the resistance and then get LCM of it then u will get a parrallel equation, putting all the resistances values in that equation.
reply me if some problem occur.