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Homework Help: Finding various currents around the circuit

  1. Sep 4, 2012 #1
    1. The problem statement, all variables and given/known data
    I have attached the circuit diagram to this thread.
    V=12V, R1=2kΩ, R2=2.7kΩ, R3=1kΩ, R4=5.1kΩ.

    Find I1, I2, I3, I4, I5, I6. Find VA, VB, VC, VD.
    I just don't know how to apply kirchoff's law to find the current and the voltage. I don't expect to have all answered. If someone can explain how to find at least 1 current and 1 voltage across a resistor, i can try to find the rest. Thank you in advance.

    2. Relevant equations

    I6=I1+I2
    I1=I5+I3
    I4=I2+I5
    V=I/R

    3. The attempt at a solution

    I1= v/R1=12/2Ω=0.006A
    I2= v/R2=12/2.7Ω=0.0044A
    I6=I1+I2 = 0.0104A
    VA=12V
     

    Attached Files:

  2. jcsd
  3. Sep 4, 2012 #2

    NascentOxygen

    User Avatar

    Staff: Mentor

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

    Can you replace 2 of the parallel resistors with a single resistor? Simplify the circuit this way so you end up with something to which you can readily apply Ohm's Law.
     
    Last edited by a moderator: May 6, 2017
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