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Homework Help: Gausses Law

  1. Jan 16, 2006 #1
    ^ number 2.

    I dont get this problem. if the plastic sheets are non-conducting, does that mean the electric field cant penetrate the sheets? and how should i do this problem?
    Last edited by a moderator: Apr 21, 2017
  2. jcsd
  3. Jan 20, 2006 #2

    Tom Mattson

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  4. Jan 20, 2006 #3


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    Nonconducting means that the charges stay where they're put.
    Since they don't tell you a dielectric constant (polarization [tex]\kappa[/tex]),
    presume that there is ZERO polarization in the material ...
    the E-field is completely uneffected by the plastic (but NOT the charges!).

    Start by enclosing all 4 charged surfaces
    (but not the negative charge at infinity ...)

    Incidently, the distance of the point from the surfaces is unimportant.
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