Nodal Analysis - No Resistor

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p75213

Joined May 24, 2011
70
I am having problems with this circuit. The circuit has 3 nodes - v1,v2 and v3. Solve for the voltage across the 3 ohm resistor using nodal analysis. the 3 equations I get are as follows:
1) (v1-v3)/6-2+(v1-v2)/4+v1/0=0
2) (v2-v1)/4+v2/0+(v2-v3)/2=0
3) (v3-v1)/6+2+(v3-v2)/2+v3/3=0
This is obviously wrong. The 1st equation has v1/0 and the second equation has v2/0. How do I get rid of them?
Can somebody help with this please?
 

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t_n_k

Joined Mar 6, 2009
5,447
Just to clarify your schematic. Is the earth [0V] connected to both the bottom "rung" and the center of the first "rung"?
 

t_n_k

Joined Mar 6, 2009
5,447
It would be useful for you to re-draw the schematic taking account of which elements are connected to the common [0V] rail. You'll find that apart from the common node there is only one other node.
 
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