Superposition Theorem

Discussion in 'Homework Help' started by Agonche, Sep 4, 2011.

  1. Agonche

    Thread Starter Member

    Aug 26, 2011
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    0
    Find the current through resistor R using superposition.

    [​IMG]

    E1=20V; E2=10V; R=10ohm; R1=2ohm; R2=5ohm

    here's my try:
    I'=1.25A
    I''=0.25A

    I get stuck when I try to find the current that comes from the current generator (Ig)
    and R3 is not given

    Does Ig participate on the current through R.

    if not then I=I'-I''=1A

    Thanks in advance
     
  2. Jony130

    AAC Fanatic!

    Feb 17, 2009
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  3. Agonche

    Thread Starter Member

    Aug 26, 2011
    30
    0
    R3 value is not given
    The current source is in series with R3
    I can't apply the current divider rule if I don't know R3

    (The current source and resistance are in series.Is that allowed ?...)
     
  4. Jony130

    AAC Fanatic!

    Feb 17, 2009
    3,957
    1,097
    You don't need to know R3 to find current flowing through 10R resistor.
    R3 is in series with constant current source so R3 will have no effect on the current.
    Only the constant current source determines the value of a current flowing in this branch.
     
    Last edited: Sep 4, 2011
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