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Homework Help: Electric field due to a line charge, surface area

  1. Sep 6, 2008 #1
    1. The problem statement, all variables and given/known data
    A charge distributed uniformly over 1 face of the circular disk, find the surface charge density ?

    well i know density for surface charge is S= charge/area, the area for face of 1 circular disk is what ? 2pir ?
  2. jcsd
  3. Sep 7, 2008 #2
    area of a circle is pi*r^2
    what u have is the circumference
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