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!

Line Charge and Charged Cylindrical Shell

  1. Oct 2, 2012 #1
    1. The problem statement, all variables and given/known data
    An infinite line of charge with linear density λ1 = 8.0 μC/m is positioned along the axis of a thick insulating shell of inner radius a = 2.1 cm and outer radius b = 4.6 cm. The insulating shell is uniformly charged with a volume density of ρ = -614.0 μC/m3.
    What is Ey(P), the value of the y-component of the electric field at point P, located a distance 6.3 cm along the y-axis from the line of charge?
    λ2 for shell = -3.23097 μC/m


    2. Relevant equations
    E.dA = Q/Epsilon nought
    Q=rhow*V in terms of volume charge density
    Q=lambda*L in terms of linear charge density


    3. The attempt at a solution

    I'm guessing you need to use Gauss' law with a cylindrical gaussian surface but I'm not sure how you can determine Q enclosed
     
  2. jcsd
  3. Oct 2, 2012 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Right.
    Take your gaussian cylinder and make it of finite length L. Then you should be able to find the charge enclosed in that volume, using λ and ρ.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook