# Urgent Circuit Analysis (Req in Parallel and Series)

• Engineering
1. Homework Statement
http://puu.sh/1faG5 [Broken]

2. Homework Equations

3. The Attempt at a Solution
http://puu.sh/1faFD [Broken]

I labelled the nodes ^^.

I redrew the circuit based on the nodes, I ignored the 10 ohm resistor because it short circuits. (Note: I drew the series resistors in reverse order, 80 ohms should be between Node A and Node B, instead, I drew it between B&C. However, the result should be the same.)

http://puu.sh/1faFh [Broken]
Based on this, the resistance is:
20 || 30 || (80+8)

Req = 10.56 ohms.

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gneill
Mentor
In your second drawing you have NODE C directly connected to terminal B. This is not how it is in the original drawing. I think you need to think a little more about how to redraw the circuit so that all the nodes and connections are preserved.

Eliminating the 10k resistor is fine; as you say, it's shorted out. The same short puts the top of the 20k resistor in contact with the bottom of the 30k resistor...

I got 16 kilo-Ohms, I think I understand what mistake I made now. I didn't follow the current from the negative terminal, I was just trying to make them connect. Makes sense now. :) THanks