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Using Nodal Analysis to determine current in a resistor

  1. Apr 16, 2017 #1
    1. The problem statement, all variables and given/known data
    df7deebdc77d83207d324a5b4bd92cd1.png

    2. Relevant equations
    ##V = IR##
    ##\sum_{k = 0}^{n} I_k = 0##

    3. The attempt at a solution
    37cfedb9d46ed11d8f7bb0b74dbc427b.png

    I set the bottom node as the reference node and worked from there to find the three equations for the loop. When I try to eliminate ##I_4## by using ##I_4 = I_2 - I_3## I run into a problem were both ##I_2## and ##I_3## scale equally are both eliminated from the simultaneous equation. I tried manipulating ##I_1## to solve it but got the wrong answer. Any help would be appreciated as I am new to nodal analysis.
     
  2. jcsd
  3. Apr 16, 2017 #2

    gneill

    User Avatar

    Staff: Mentor

    You're doing loop analysis (KVL) but they want you to use nodal or source transforms.

    Can you write node equations using the given component values? The only variables you should introduce are the node potentials. No current variables!
     
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