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Super Node next to a Ground?

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  1. Nov 4, 2014 #1
    If a voltage source is connected between a ground and a node of unknown potential will it be a super node.
    For example would the 5V source be part of a supernode?
    eFdoNaP.png
     
  2. jcsd
  3. Nov 4, 2014 #2

    phinds

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    Yes, the 5V source is a supernode construct. In this case it has one referenced node (E) and one unreferenced node (G). Supernodes usually refer to voltage sources that have both sides off of ground and thus have two unreferenced nodes. Personally, I find the whole concept of supernodes to be a useless verbal addition to nodal analysis.
     
  4. Nov 5, 2014 #3
    So VE would still be zero right or 5V?
     
  5. Nov 5, 2014 #4

    phinds

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    Ve is AT the ground symbol, so how could it possibly be anything but ground?
     
  6. Nov 5, 2014 #5
    I was just wondering if a wire was connected between ground and node E would in this case VE still be 0V. I was wondering maybe the source to the right could also affect it. Sorry if dumb question but I can't get my head around it.
     
  7. Nov 5, 2014 #6

    phinds

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    The fact that the positive side of the voltage source is tied to ground is irrelevant. Ground is ground. In terms of the circuit, node G is at -5V

    As for "A wire connected between ground and node E", node E IS ground.
     
  8. Nov 5, 2014 #7
    Cool thanks.
     
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