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!

The Electric Field Due to a Charged Disk

  1. Jan 25, 2009 #1
    1. The problem statement, all variables and given/known data
    A circular plastic disk with radius R = 1.80 cm has a uniformly distributed charge of Q = + 2.15 106 e on one face. A circular ring of width 30 µm is centered on that face, with the center of the ring at radius r = 0.50 cm. What charge is contained within the width of the ring?


    2. Relevant equations
    E=σ/2ε(1-z/√(z^2+R^2 ))


    3. The attempt at a solution

    e=8.85e-12
    o= 2.15e6
    z=.5 cm
    r= 1.8
    Ans=3.15 e10
     
  2. jcsd
  3. Jan 25, 2009 #2

    Delphi51

    User Avatar
    Homework Helper

    I don't see it as an electric field question. The question asks "what charge ...".
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: The Electric Field Due to a Charged Disk
Loading...