1. Not finding help here? Sign up for a free 30min 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!

Circuits (Power and Complex Power) Help

  1. Sep 13, 2010 #1
    1. The problem statement, all variables and given/known data
    photo-9-1.jpg


    photo-9-2.jpg


    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

    rock.freak667

    User Avatar
    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.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Circuits (Power and Complex Power) Help
  1. Power, circuits. (Replies: 9)

  2. Complex power (Replies: 1)

Loading...