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Print ViewCalculating Flux for Hemispheres of Different Radii

  1. Feb 14, 2007 #1
    Calculating Flux for Hemispheres of Different Radii

    1. The problem statement, all variables and given/known data
    Calculating Flux for Hemispheres of Different Radii.
    There are two hemispheres and I have to find the flux through the annular ring of surface 1, 2, and 3 in terms of C (a constant proportional to a charge) and two radii r_1 and r_2.
    Here is a diagram of this http://img233.imageshack.us/img233/5523/hemsp1tw8.gif [Broken]

    2. Relevant equations
    flux = |E||dA|cos(theta)
    E(r)=C/r^2 r_hat
    These are the equations that are given in the problem.

    3. The attempt at a solution
    I really have know idea where to go with this problem. I know it just has to be the equation, but I don't know how to set it. If anyone has any strategies to solving this problem that would be great.
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Feb 24, 2007 #2
    I am probably too late but

    You have E = C/r^2
    You have flux = E*A

    Once you find your area, you can cancel the radius out
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