Solving Circuit Analysis with Nodal Analysis - Help Needed!

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Discussion Overview

The discussion revolves around analyzing a circuit using nodal analysis. Participants are examining the equations derived for the voltages at different nodes and seeking assistance with discrepancies in their results.

Discussion Character

  • Homework-related
  • Mathematical reasoning

Main Points Raised

  • One participant presents equations for three nodes but reports incorrect results for the voltages v1, v2, and v3.
  • Another participant suggests that the issue may stem from using conductance instead of resistance in ohms.
  • A third participant questions the completeness of the equation for node 3, proposing the inclusion of a term related to current (3i_0) that may have been overlooked.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the source of the error in the original equations, as there are competing views regarding the use of conductance and the completeness of the equations.

Contextual Notes

There are indications of missing assumptions regarding the definitions of variables and the treatment of current sources in the equations. The discussion does not resolve these issues.

Who May Find This Useful

Students or individuals interested in circuit analysis, particularly those learning about nodal analysis and troubleshooting related equations.

mralam
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Hey guys. I have attached a circuit that i am trying to analyse using nodal analysis.
This is how i am doing it:

at node 2:
(v2-v1)/1 + v2/4 + (v2-v3)/1 = 0

at node 3:

(v3-v2)/1 + v3/2 = 4A

at node 1:

v1/25 = 2A

but i am not getting the right results for v1, v2 and v3.

Can anyone point out what i am doing wrong?

thanks
 

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Physics news on Phys.org
Looks like you are given conductance of the resistors rather the resistance in ohms.
 
i have asked about that and it is suppose to be ohm not s
 
If your node 3 is at v_3, then where 3i_0 is in the equation?For the node 3, I would write the equation like 3i_0+4A=(v_3-v_2/1s)+v_3/2s. I think you may have missed the 3i_0 in your equation.
 

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