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KCL Nodal Analysis & Power to Resistor (Need help)

  1. Sep 20, 2015 #1
    1. The problem statement, all variables and given/known data
    Here is the homework problem I was given:
    SS 2015-09-20 at 3.51.03 PM.png

    3. The attempt at a solution

    Above is the work that I began, however, I have an overwhelming feeling that I am incorrect and also I don't know how to continue to the next part/parts. Would someone please help me?
    Thank you
  2. jcsd
  3. Sep 20, 2015 #2
    I haven't checked each part, but I do see an issue: note that in your second equation, you've got a voltage plus a current. Any time you're adding different units, something has gone wrong.
    Last edited: Sep 20, 2015
  4. Sep 20, 2015 #3
    You're right, I can't do that..
    Is the Voltage at the second node equal to the Voltage source, since there's nothing in between the Voltage source and the node?
  5. Sep 20, 2015 #4


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    Gold Member

    no. there is a resistor AND a voltage source in between the two nodes. If you want to do nodal anlysis you'll need to use a 'supernode'
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