An interesting circuit once appeared under this thread:
http://forum.allaboutcircuits.com/showthread.php?t=43005
and I thought I would show how I solved it.
Using just 3 node voltage method equations.
The original problem said: "Find the resistance between points A and B if R=81 Ω.
This is the original circuit, posted by the OP:
All resistors are 81 Ω
Now this is what I did:
1. I re-drew the circuit to make it look neater.
2. I converted the three last resistors into 1.
3. I labeled E1,E2,E3 nodes.
4. I applied Node Voltage method.
And since the voltages E1, E3, are 3.5V, 2.8V, respectively, it follows that:
(3.5V/81) + (2.8V/81) = 77.77mA
Which means that the total circuit resistance is: 90 Ω
----
Thanks to Tony Kuphaltd for his great book.
Thanks to Qucs software for Linux to draw the schematics.
And thank you guys for letting me post this on the forum!
http://forum.allaboutcircuits.com/showthread.php?t=43005
and I thought I would show how I solved it.
Using just 3 node voltage method equations.
The original problem said: "Find the resistance between points A and B if R=81 Ω.
This is the original circuit, posted by the OP:
All resistors are 81 Ω
Now this is what I did:
1. I re-drew the circuit to make it look neater.
2. I converted the three last resistors into 1.
3. I labeled E1,E2,E3 nodes.
4. I applied Node Voltage method.
And since the voltages E1, E3, are 3.5V, 2.8V, respectively, it follows that:
(3.5V/81) + (2.8V/81) = 77.77mA
Which means that the total circuit resistance is: 90 Ω
----
Thanks to Tony Kuphaltd for his great book.
Thanks to Qucs software for Linux to draw the schematics.
And thank you guys for letting me post this on the forum!
