Circuits II, can someone check my equations ? Phasor Mesh Analysis

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Discussion Overview

The discussion revolves around the correctness of equations derived from nodal analysis in a circuit problem. Participants are seeking validation of their equations and exploring discrepancies between their results and those presented in a textbook.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant initially confuses nodal analysis with mesh analysis but clarifies their intent.
  • Another participant confirms that the equations appear correct and suggests that the textbook may contain an error.
  • A third participant agrees with the assessment of the equations and mentions using Mathematica to find component values that align with the textbook's solution, indicating potential discrepancies in the book.
  • Participants express frustration over the uncertainty of whether the error lies with their calculations or the textbook.

Areas of Agreement / Disagreement

There is a general agreement among participants regarding the correctness of the equations presented. However, there remains disagreement about the accuracy of the textbook's solution, with multiple views on the source of the discrepancy.

Contextual Notes

The discussion highlights the potential for errors in textbooks and the challenges of verifying solutions in circuit analysis, particularly when using computational tools to cross-check results.

thecake
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EDIT I mean nodal, not mesh analysis xD

http://img205.imageshack.us/img205/5931/omgt.jpg

http://img694.imageshack.us/img694/2570/omg2p.jpg

Are my are my equations correct?

Here is the solution according to wolfram!
http://www.wolframalpha.com/input/?...v2/(i*2*2)+(v2-v1)/(1/(2*i*0.2))+(v2-3v1)/4=0

or

http://www.wolframalpha.com/input/?...++b*0.25+++b*0.15*i++-+a+*0.75+-+a*0.4*i++=+0

but it still doesn't match the book's answer, I am not sure what's wrong :(

help please
 
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Nodal analysis not mesh analysis :),

Anyone?
 
Your equations look correct, and I get the same solution you did. This is apparently one of those cases where the book has a wrong solution.

I allowed Mathematica to search for component values that would give the solution from the book. Setting the inductor to 3H and the capacitor to .3F came close.
 
The Electrician said:
Your equations look correct, and I get the same solution you did. This is apparently one of those cases where the book has a wrong solution.

I allowed Mathematica to search for component values that would give the solution from the book. Setting the inductor to 3H and the capacitor to .3F came close.

Thanks, you have confirmed what I have suspected :D, I have literally spent hours trying to figure out who's wrong, me or the book.
 

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