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Homework Help: Emergency:quality factor

  1. May 7, 2010 #1
    1. The problem statement, all variables and given/known data
    i have a problem about RCL parallel circuit .
    when we have a RCl circuit with applied sinsusoid currnet ,we make all parameters in circuit as complex number i mean make them phasors.
    i study this formula in my book and i do not know how too proove it.
    why quality factor in this circuit is the ratio of capacitor or indoctor current to applied current?


    2. Relevant equations

    Q=I(c)/I(s)=I(l)/I(s)

    3. The attempt at a solution
    with the help of impedence and I(C)=V/X(c) and I(s)=V/Z
     
  2. jcsd
  3. May 8, 2010 #2

    ehild

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    Homework Helper

    Was it a series or parallel RLC circuit?

    How did you define the quality factor?

    What did exactly your book say about the quality factor being equal to the ratio of currents?



    ehild
     
    Last edited: May 8, 2010
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