Problem with nod voltage analysis se the picture

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Homework Help Overview

The discussion revolves around a nodal voltage analysis problem, specifically focusing on the calculation of Thevenin's voltage in an electrical circuit depicted in an image shared by the original poster.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the correctness of the equations derived for V2, with some suggesting that there may be a mathematical error in the calculations. Questions arise regarding the value of Thevenin's voltage and the relationship between V2 and the expected results.

Discussion Status

There is ongoing debate about the accuracy of the calculations, with some participants expressing confusion over the values being discussed. While some guidance has been offered regarding potential errors in algebra, there is no clear consensus on the correct value of Thevenin's voltage.

Contextual Notes

Participants are working with a specific image that contains the circuit details, and there are references to expected answers from a teacher, indicating that there may be constraints based on homework guidelines or expectations.

TheNaturalStep
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Please watch the picture
http://img161.imageshack.us/img161/8170/problem1yf5.jpg

I am very thankfull toward any help given :)
 
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I think it's just a math error. I agree with your equation for V2, but get a different result when I multiply it all out.
 
berkeman said:
I think it's just a math error. I agree with your equation for V2, but get a different result when I multiply it all out.

It should be 45 V; it is the thevenins voltage i am seeking ...
 
Anyone? :(
 
TheNaturalStep said:
It should be 45 V; it is the thevenins voltage i am seeking ...

I have no idea what that means. In your figure, you say that you want to solve for V2. You then use the node voltage (KCL) method correctly to derive an equation for V2. The only problem is that you made a simple algebra/math error in solving for the value of V2. It is not 54V and it is not 45V. Just do the math at the end more carefully, and you'll get a correct value for V2.
 
berkeman said:
I have no idea what that means. In your figure, you say that you want to solve for V2. You then use the node voltage (KCL) method correctly to derive an equation for V2. The only problem is that you made a simple algebra/math error in solving for the value of V2. It is not 54V and it is not 45V. Just do the math at the end more carefully, and you'll get a correct value for V2.

I know it is V2 67,2 but i am seeking the thevenins voltage, and shouldn't that be 67,2?

:confused:
 
You are my life line guys, but if you don't know it is ok i guess :( ...

I just so need that peace of informationAbout 45V that is the teacher answer ...
 
Bump bump bump
 

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