Engineering Basic Circuit Analysis, having difficulties

AI Thread Summary
The discussion revolves around a user's struggle with a nodal analysis problem in circuit analysis, specifically finding the voltage E1. The user initially calculated Va as 10/4 but noted that the professor's solution is 42/3. They realized a mistake involving the interpretation of symbols in the problem and attempted to use conductivity instead of resistance. Despite these adjustments, the user continues to receive incorrect results and seeks further assistance. The conversation highlights common challenges in understanding circuit analysis and the importance of careful symbol interpretation.
coachspoon
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Homework Statement



Hi, this is my first time posting so if there is any advice on how to make this post cleaner, please tell me! I've been stuck on a problem and I can't figure out what I'm doing wrong. I have attached the problem and the attempt at solving the problem below. I am supposed to find E1 using nodal analysis.

Homework Equations


In my work that I attached, I replaced the name E1 with node A. I also used a supernode between A and C.

The Attempt at a Solution


Homework Statement


I solved Va = 10/4, however the solution that my professor gave me says its supposed to be 42/3. Any help is appreciated!
 

Attachments

  • EE211#25.jpg
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  • CAM00040.jpg
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Last edited:
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Hi coachspoon! http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif

Those upside-down Ω symbols don't mean Ohms!
 
Last edited by a moderator:
oh my goodness i didn't notice, I'm a bonehead haha! thank you! let me see if i can solve it properly now.
 
I have solved it using conductivity = 1/r. However, I am still getting an incorrect answer. Any help is appreciated!
 

Attachments

  • CAM00041.jpg
    CAM00041.jpg
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coachspoon said:
I have solved it using conductivity = 1/r. However, I am still getting an incorrect answer. Any help is appreciated!

Your new result looks good to me.
 

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