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[Quick] At what capacitance will the current in the resistor be a maximum?

  1. Apr 10, 2012 #1
    1. The problem statement, all variables and given/known data

    A series RLC circuit is connected across a 6.70 kHz source. The 1.50 H inductor and the 1.35×103 kohm resistor are fixed whereas the capacitor is variable. At what capacitance will the current in the resistor be a maximum?

    2. Relevant equations

    No idea..

    3. The attempt at a solution

    I can't find any equations that will let me solve for capacitance in this situation. I know that current is maximum (resistance minimum) at resonance when Xl=Xc, and phi=0.

    edit: nevermind, didn't think to just use Xl=Xc to solve for C...
     
    Last edited: Apr 10, 2012
  2. jcsd
  3. Apr 11, 2012 #2
    The current will be maximum at resonance. Do you know the relationship between Xl and Xc at resonance?
     
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