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Homework Help: Basic Circuit Analysis, having difficulties!

  1. Mar 7, 2014 #1
    1. The problem statement, all variables and given/known data

    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.

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

    3. The attempt at a solution
    1. The problem statement, all variables and given/known data
    I solved Va = 10/4, however the solution that my professor gave me says its supposed to be 42/3. Any help is appreciated!

    Attached Files:

    Last edited: Mar 7, 2014
  2. jcsd
  3. Mar 7, 2014 #2


    User Avatar

    Staff: Mentor

    Hi coachspoon! http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif [Broken]

    Those upside-down Ω symbols don't mean Ohms!!!
    Last edited by a moderator: May 6, 2017
  4. Mar 7, 2014 #3
    oh my goodness i didn't notice, i'm a bonehead haha! thank you!! let me see if i can solve it properly now.
  5. Mar 7, 2014 #4
    I have solved it using conductivity = 1/r. However, I am still getting an incorrect answer. Any help is appreciated!

    Attached Files:

  6. Mar 7, 2014 #5


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    Staff: Mentor

    Your new result looks good to me.
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