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Me solving 2 electrical network problems

  1. May 13, 2013 #1
    plz help me solving 2 electrical network problems

    file:///C:/Documents%20and%20Settings/user/My%20Documents/My%20Pictures/From%20RSPC_Pashya/Camera%20roll/WP_000127.jpg

    In first problem I have to find current through 5Ω resistor using Thevinins eq.

    So, in first step i removed 5Ω resistor with open ckt. hence Ix=0 hence the dependent source becomes zero. 4A+1A that is 5A going up. then kcl at above node yields me node voltage 14.28v

    so my vth comes 14.28v

    now, as Ix becoming zero and dependent source becoming zero we can calculate Rth=1.1428Ω
    so to find current thru 5Ω

    I will be 14.28/6.1428..... hence i got answer as 2.34A.

    But answer given to me is 4A.

    plz help.

    In second problem also we need to find current through 24Ω using Thevinins eq.

    I applied kvl at input side & kcl at output side got two equations
    8Ix-Vx=16
    130Ix+Vx=0

    solving i got Vx=15v == Vth

    then solved for Isc which i got 0.48A
    Current throgh 24 ohm i got 0.271A

    am i correct?

    plz help
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. May 13, 2013 #2

    tiny-tim

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    welcome to pf!

    hi pforpashya! welcome to pf! :smile:
    erm :redface:

    i can't see the picture …

    it's still on your computer! :wink:
     
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