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Homework Help: E-field for infinitely long cylinder

  1. Feb 27, 2005 #1
    ifthis is an infinitely long cylinder how can i derive an equation for finding the magnitude of the electric field? i have the answer which is E=2*pi*rho*K*r but i dont understand how they got it.
     

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    Last edited: Feb 27, 2005
  2. jcsd
  3. Feb 27, 2005 #2
    did you try using gauss' law?.... it is straight forward.... draw a picture, pick a reasonable gauss' surface, and do the simple math (no need calculus)
     
  4. Feb 27, 2005 #3

    Doc Al

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    Staff: Mentor

    Use Gauss's law and take advantage of symmetry.
     
  5. Feb 27, 2005 #4
    i did but we are getting the wrong answer when we cancel things out.. thats why i was asking here.
     
  6. Feb 27, 2005 #5

    Doc Al

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    Staff: Mentor

    Show your work and we can take a look.
     
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