1. Not finding help here? Sign up for a free 30min 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!

Capacitor with a dielectric: studying for an exam

  1. Apr 30, 2012 #1
    Okay so I have a parallel-plate capactior
    k=5.5
    Area= .034m^2
    Plate Separation= 2mm
    If the Electric Field falls short, the capacitor will burn up if exceeding 200kN/C.

    It's asking for the max energy stored by the capacitor.


    My attempt was lame.
    I tried using
    C= (ε0)A/d

    and since it's a dielectric, i replace ε0 with ε0k

    Also I used
    U= .5CV^2
    Replacing V with E/d
     
  2. jcsd
  3. Apr 30, 2012 #2

    gneill

    User Avatar

    Staff: Mentor

    For a capacitor the field magnitude in a dielectric is not the same as the field magnitude in free space. So you might want to think a bit more about how the dielectric will affect things.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Capacitor with a dielectric: studying for an exam
  1. Capacitor and Dielectric (Replies: 11)

Loading...