- #1

mitchapalooza

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**Having trouble with some review circuits using nodal analysis :(**

## Homework Statement

I'm trying to find node voltages for v1, v2, and v3.

I = 3.1A

## Homework Equations

V=IR

## The Attempt at a Solution

My method of going about and solving this was fairly straight forward I thought. The way the question is set up, I believe nodal analysis is already ready to go. So I started with

KCL(v1): 2 + 3.1 + (v1-v2)/3Ω = 0

KCL(v2): (v2-v1)/3 + v2/2 + (v2-v3)/4 = 0

KCL(v3): (v3-v2)/4 + v3/3 - 3.1 = 0

Now it's been a while since I've done this (nodal analysis), but I now have 3 eqns and 3 unknown variables. The answer I have is -21.2V -5.87V and 2.8V respectively.

It's one of those, "I've tried all my guesses, need some reassurance before I commit to my last chance" scenarios.

Any helpful on this would be great! Thanks :D

Note that I haven't tried the brute force method of just solving for everything, or the mesh current method.