(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

http://img12.imageshack.us/img12/6886/nodalanalysisproblem.jpg [Broken]

3. The attempt at a solution

I put in the currents for KCL in the diagram, though I'm not sure if I've done it right.

So essentially I get the equation as i1 + 3 = i2 + i3

Current in = current out.

i1 = v1/10

i2 = v1/5

i3 = v2/4

So we get v1/10 + 3 = v1/5 + v2/4

Simplifying, this becomes: 2v1 + 60 = 4v1 + 5v2 =>2v1 + 5v2 = 60

I wasn't quite sure what to make of the current source, I first thought maybe I should convert the 6A current source and the 2 ohm resistor in parallel to a voltage and resistor in series which makes it a 12 V source and then apply KVL to the loop to get -v1 + 12 +v2 = 0; however going down this path and solving for the voltages does not get me the correct answer.

The correct answer is v1 = 0 and v2 = 12V - where have I gone wrong?

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Nodal Analysis Question - Find the Node Voltages

**Physics Forums | Science Articles, Homework Help, Discussion**