1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Circuits - Node analysis of connected and dependent sources

  1. Sep 8, 2014 #1


    User Avatar
    Gold Member

    I have a problem with the theory side of this circuit here:
    1. The problem
    I know that you are supposed to pick the buttom node of the circuit to represent your significant node at which you shouldnt construct a series of equations. But what if I picked another node as my significant node and I would come to this node and have to draw the current leaving the node. It is pretty clear for the whole circuit but the problem I see is that there is that line that connects these two sub-circuits and I don't know how it behaves.

    2. Relevant equations

    3. The attempt
    My thought are that the current can't "come back for refueling" if it would go throught that pass. I have to little knowledge about this situation to say anything.

    Can anyone please help me with this issue?
  2. jcsd
  3. Sep 8, 2014 #2


    User Avatar

    Staff: Mentor

    Your intuition is correct. Current flow requires a circuit (a closed loop). So that wire segment joining the two sub-circuits carries no current. You can remove it if you wish; the two sub-circuits interact via the controlled source parameters.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted