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Related to Gauss's law (charge distribution throughout the volume of a cylinder )

  1. Oct 15, 2011 #1
    1. The problem statement, all variables and given/known data
    Charge is distributed uniformly throughout the volume of an infinitely long cylinder of radius R.
    a)Show that at a distance r from the cylinder (r<R): E= (ρ*r)/2ε° where ρ is the volume charge density and (b) write and for E when r>R


    2. Relevant equations



    3. The attempt at a solution
    hey guys...i was able to prove the first part:
    as q= ρv= ρ∏r^2 * L

    EA= Q/ε

    E= (ρ∏r^2L)/ε°2∏rL >> after cancelling i got that expression in the question...

    and about the b part, do we just do the same thing...which r do we substitute? Please help asap
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Oct 15, 2011 #2

    rude man

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    Homework Helper
    Gold Member

    Re: Related to Gauss's law (charge distribution throughout the volume of a cylinder..

    It's the same old Gauss law! EA = q/e0 as you say.
    What are q and A now?
     
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