1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Symmetrical electric objects

  1. Sep 18, 2010 #1
    1. The problem statement, all variables and given/known data

    I need a strategy to resolve electrostatic problems such as the infinite cylindrical shell of radius r1 and r2 of non conducting material. I'm confused in applying a gaussian surface in this and others cases. Is there a recipe for it?

    2. Relevant equations

    Gauss's law.

    3. The attempt at a solution
  2. jcsd
  3. Sep 18, 2010 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    Usually, the faces of a Gaussian surface are either perpendicular or parallel to the electric field. The faces that are parallel contribute nothing to the sum (or integral) of E·A (or E·dA). Also, the field is usually of equal magnitude over the faces where it is perpendicular, so those have a contribution of simply E·A.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook