Need help with beginner DC Circuits questions

Discussion in 'Homework Help' started by Voz, Sep 4, 2014.

  1. Voz

    Thread Starter New Member

    Sep 4, 2014
    2
    0
    Hello, I have some homework due, and I'm hitting a wall on this problem. Our professor has provided us with the answers, but we must show our work. I've posted a picture of the problem I'm working on right now that's giving me a hard time. Thanks for the help!

    http://imgur.com/NXr3yhB

    Edit: I forgot, where you see [3], there is a 2A going into the negative side of [3]
     
  2. mjakov

    New Member

    Feb 13, 2014
    20
    5
    Hi,

    we can use Kirchoff's Current Law for the circuit node between the elements 1 and 2. The sum of ingoing and outgoing currents has to be zero, thus:
     I_x + 2A - 2I_x = 0
     I_x = 2A
     
  3. Voz

    Thread Starter New Member

    Sep 4, 2014
    2
    0
    Thank you. I was doing multiplication the whole time, and it was coming out to be like
    I_x * 2A = 2I_x
    Which is a big "duh".
    I feel dumb now.
     
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