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Another Net charge question

  1. Oct 14, 2007 #1
    If the field is zero at all points on a surface, does this mean there is no net charge enclosed by the surface?

    I thought if you had an insulator of some kind wrapping around the charged particle, it could have those properties. but i also feel that electric field will go through insulator..( like a magnet thats still magnetic even if its covered by a layer of wood)..

    any help would be appreciated
     
  2. jcsd
  3. Oct 14, 2007 #2

    Doc Al

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    Yes.

    I don't understand what you're saying here.
     
  4. Oct 14, 2007 #3
    well, if theres a charged sphere, like a mouse ball, but the outside of it is wrapped in rubber, which will insulate it, would there be an electric field on the surface of the rubber?
     
  5. Oct 14, 2007 #4

    Doc Al

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    Sure, why not?
     
  6. Oct 14, 2007 #5

    jtbell

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    Staff: Mentor

    Insulators block electric current, not the electric field.
     
  7. Oct 14, 2007 #6
    thanks DOC Al and jtbell!
    thats exactly what i needed to know but wasnt sure about!
     
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