Total net voltage applied to lamps

Discussion in 'Homework Help' started by Azure326, Feb 5, 2007.

  1. Azure326

    Thread Starter New Member

    Feb 5, 2007
    1
    0
    Hey guys, I'm doing a HW problem where I'm told to find the total net voltage being applied to 3 identical lamps. Here's my crude drawing:

    [​IMG]

    Okay, I know that +6V is coming in from above to the lamps and -6V is coming in from the bottom to the lamps. So, how do I find out what the "total net voltage applied to the lamps" is? I would guess 6 V, but I'm not sure due to the wording of the problem. I know that it is 6V -> lamp -> 2V -> lamp -> -2V -> lamp -> -6V.

    MUCH thanks in advance!
     
  2. mrmeval

    Distinguished Member

    Jun 30, 2006
    833
    2
    You have a 12v supply running 3 equal loads. :)

    That center tap inbetween the batteries is confusing. It's not the lowest potential point and it's just hanging there.
     
  3. MadTaco

    New Member

    Feb 10, 2007
    1
    0
    Ground can be anywhere... and from what I understand (correct me if I'm wrong), if you're using negative potential you are simply referencing ground from a negative position as opposed to 0V.

    -6V to +6V = 12V

    In this case it just looks like two 6V sources in series, which also gives 12V... which will apply 4V to each lamp.

    Travis
     
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