1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Quick question Superposition method

  1. Oct 18, 2012 #1
    Ok, can anyone tell me if my steps are correct. Find volts in the 30ohms

    1. eliminate current source
    2. transform battery to current source
    3. applied mesh method to find current at 30ohms

    1. eliminate battery source
    2. applied mesh method to find current at 30ohms

    1. to find the current at 30ohms I substracted the current that I got from doing part 1 and doing part 2 to get the actual current at the 30ohms
    2. Finally used ohms law to find voltage

    Is this correct? I know there are easier ways but I did it this way

    Attached Files:

    Last edited: Oct 18, 2012
  2. jcsd
  3. Oct 18, 2012 #2


    User Avatar

    Staff: Mentor

    Your loop equations all look okay, but something seems to have gone wrong with your determination of I4 in the first part (where you suppressed the current source and converted the voltage source).

    Why not consider combining the parallel 20, 40, and 60 ohm resistors to begin with; it'd make your analysis simpler.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook