Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Capacitor and ac?

  1. Nov 6, 2008 #1
    How come an AC flows through a capacitor when there is no continuity inbetween its plates??how come the resistance offered by a capacitor changes with frequency??
    Last edited: Nov 6, 2008
  2. jcsd
  3. Nov 6, 2008 #2
    In 2 words: "displacement current". That should get you started.

  4. Nov 6, 2008 #3


    User Avatar

    Staff: Mentor

    This should help as an introduction: http://en.wikipedia.org/wiki/Capacitor

    And as I mentioned in your nearby Inductor thread, it's the "impedance" that changes with frequency, not its "resistance".
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook