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Circuit Analysis: Current flowing from negative to positive?

  1. Jun 21, 2012 #1
    1. The problem statement, all variables and given/known data

    http://images.4chan.org/sci/src/1340320682704.jpg [Broken]

    I am to write KCL equations for this circuit. Why is it that the current flowing AWAY from Node C is written as V2(t). I thought that when a current was flowing AWAY from a node, the current would be -V2(t)??

    2. Relevant equations



    3. The attempt at a solution

    My guess is this.

    Normally a current flows from + to -. If this is true then:
    > Current is negative when flowing away from a node and positive when flowing toward a node.

    Unless the polarity is switched (like it is in the circuit diagram in which case, the sign if the current is switched? But i dont know if this is true or not. can anyone confirm or deny this?
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
    Last edited by a moderator: May 6, 2017
  2. jcsd
  3. Jun 21, 2012 #2

    phinds

    User Avatar
    Gold Member
    2016 Award

    It would be helpful if you would show the circuit you are talking about.

    Just listing an entire web site is not helpful
     
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