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Homework Help: Circuits (Power and Complex Power) Help

  1. Sep 13, 2010 #1
    1. The problem statement, all variables and given/known data


    2. Relevant equations

    3. The attempt at a solution

    I am just lost on these two problems. What I think on the first one is that I have to convert the voltage but from there I am lost. I am guessing I also have to figure the current.

    For the second problem, I know that S = P + Q. I am just lost on the other ones.

    Thanks for the help.
  2. jcsd
  3. Sep 13, 2010 #2


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    Homework Helper

    Well you should know that Z=R+jX and I=V/Z, so find that and convert that into polar/Cartesian form.
  4. Sep 13, 2010 #3
    For the second part, try drawing out a 'power triangle' and thinking about what each of the three sides represent.
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