1. Limited time only! Sign up for a free 30min personal 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!

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.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook