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Averag power of an RLC circuit

  1. May 2, 2010 #1
    1. The problem statement, all variables and given/known data

    4.) Determine the average power in an RLC circuit. Derive an expression for the resonance frequency in terms of L and C. Is the average power a maximum or a minimum at the resonance frequency?

    2. Relevant equations



    3. The attempt at a solution
    I have circled in red the part that is giving me trouble, all the rest of the solution i can do, is that part some identity or rule i am missing?
    EM6Q4-1.jpg
     
  2. jcsd
  3. May 2, 2010 #2
    this picture is probably a bit easier to see...

    EM6Q4-3.jpg
     
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