Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Hel again

  1. Jul 17, 2006 #1
    http://www.pa.msu.edu/courses/1997spring/PHY232/lectures/kirchoff/examples.html" [Broken]

    how can you solve my circuit (that i attached) using that procedure... in that site.. i saw it last week... thats the shortest way i seen... can you help me.. thankss

    Attached Files:

    • KCL.JPG
      File size:
      12.4 KB
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Jul 17, 2006 #2


    User Avatar
    Homework Helper

    Did you learned Kirchoff's laws ? Show your work.
  4. Jul 19, 2006 #3
    yah i learned it.... but it is the longest solution.... i hate that.... i want the shortest method.... that i found in that site.. can you solve it using that method?

    i put the answer @ my attachment

    here is the solution i've learned

    @node B
    i1 + 12 - i3 = 0
    i3 = i1 + i2 that is for eq. 1

    @loop abefa
    E1 + E2 -15i1 +26i2
    40v + 50v -15i1 +26i2
    90 + 26i2 / 15i1 eq. 2

    @loop bcdeb
    -E2 -E3 -26i2 -37i3
    -50 -60 -26i2 -37i3
    -110 -37i3 / 26i2 eq. 3

    that is the my sample solution ive learnd.... but it is not finish.. like i said; that is the longest solution.... hoping that you understand it.....

    (sorry bad grammar)
  5. Jul 19, 2006 #4


    User Avatar

    Staff: Mentor

    You need to set the second two things equal to zero to make them equations. That gives you 3 equations and 3 unknowns -- just solve away. There's not really a quicker way to solve it that I know of, unless you mean using determinants to solve the simultaneous equations. In this circuit, the equations are simple enough that solving with determinants won't save you any time.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook