KCL Nodal Analysis & Power to Resistor (Need help)

  • #1
63
1

Homework Statement


Here is the homework problem I was given:
SS 2015-09-20 at 3.51.03 PM.png


The Attempt at a Solution


IMG_5338.JPG


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
H
 

Answers and Replies

  • #2
941
394
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:
  • #3
63
1
I haven't checked each part, but I do see an issue: note that in your second equation, you' a got a voltage plus a current. Any time you're adding different units, something has gone wrong.
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?
 
  • #4
donpacino
Gold Member
1,439
282
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?
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'
 
Top