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Homework Help: RMS Voltage across capacitor

  1. Apr 28, 2009 #1
    1. The problem statement, all variables and given/known data

    The inductance is 0 in the RLC Circuit. the rms voltage across the genreator and the resistor are 45, and 24V. Wats the voltage across the capacitor?

    2. Relevant equations

    Vrms= Vmax/ Sq rt 2
    V c = IX c ,

    3. The attempt at a solution

    V= I/R
    I= V/R 24/45= 8/15A

    C can be calculated since theres no F or L
     
  2. jcsd
  3. May 20, 2010 #2
    Recall the Kirchoff's voltage law. The voltage across all elements in a loop added is zero. Here there are only three elements ( generator, resistor and capacitor). The sum of voltages across them should be zero. You know voltage across two elements. Hence it is easily to calculate the voltage across C directly.
     
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