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RC Circuits and Current

  1. Mar 24, 2010 #1
    1. The problem statement, all variables and given/known data

    Find the current I1 in the 1.2
    resistor
    at the bottom of the circuit between the two
    power supplies.
    Answer in units of A.
    015 (part 2 of 3) 10.0 points
    Determine I2.
    Answer in units of A.
    016 (part 3 of 3) 10.0 points
    Determine I3.
    Answer in units of A.

    2. Relevant equations
    I=Ifinal(e^-t/RC)
    V=IR



    3. The attempt at a solution

    V=IR
    I=V/R
    I=9.5/1.2
    I=7.91667A

    The attachment is a picture of the circuit. I really have no idea how to solve this and could use some helpful explanation. Thanks!

    Kevin
     

    Attached Files:

    Last edited: Mar 24, 2010
  2. jcsd
  3. Mar 24, 2010 #2
    ok i understand i must use the loop rule and the junction rule.

    I made it where there are two loops
    Loop1:
    9.5-1.2I1+2-3-5.4I2-3.1=0

    Loop2:
    3.1-5.4I2-8.4I3=0

    I think this may be right, if it is i am still unsure of how to continue with the problem
     
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