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Electrostatics problem

  1. Aug 27, 2008 #1
    1. The problem statement, all variables and given/known data
    The problem is attached as an image.

    2. Relevant equations

    I guess that there is more...

    3. The attempt at a solution

    I got stuck stright on A), for I don't have a clue what to do with such a weird Rho value.
    Afterwords when we want to find E field - can't we just say E=v0/D ?

    Attached Files:

  2. jcsd
  3. Aug 28, 2008 #2
    Choose a starting radius,the angle r(instead of theta) is the angle in the cos term,divide the cylinder into different anglular elements of angle dr,each of these has an area 1/2*a*a*dr and a length D,Each on has a resistance of rho*D/Area where the formula for rho in terms of angle is given,,all such elements are connected in parallel,take the reciprocal and integrate r from 0 to 2pi,then reciprocate the answer to get the restistance.
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