Problem with nod voltage analysis se the picture

AI Thread Summary
The discussion revolves around a problem with nod voltage analysis, specifically calculating the Thevenin voltage, which the original poster believes should be 45V. Participants agree that the method used to derive the equation for V2 is correct, but the poster likely made a simple algebraic error in their calculations. One contributor suggests that the correct value for V2 is not 54V or 45V, indicating that careful re-evaluation of the math is necessary. The poster expresses frustration over the lack of assistance and reiterates their need for clarification on the Thevenin voltage. The conversation highlights the importance of accurate calculations in electrical engineering problems.
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 teh 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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