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I Dielectric charges

  1. Mar 13, 2017 #1
    can someone in detail explain to me why can't a dielectric attract charges?
  2. jcsd
  3. Mar 13, 2017 #2
    Typically a dielectric is a neutrally charged polarizable material. When you apply an electric field, such as in a capacitor, the electric field will polarize it, inducing a smaller electric field in the opposite direction.

    But yeah, the quick answer is that it doesn't have a net positive or negative charge.
  4. Mar 14, 2017 #3


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    The induced polarisation in a dielectric can cause attraction. Dust particles are attracted to a charged rod even when they have no net charge.
    So the OP is not strictly accurate except in a uniform field.
  5. Mar 14, 2017 #4
    This is also true. Any induced charge will create it's own electric field as I said, which can interact with charges the way any other electric field would.
  6. Mar 14, 2017 #5
    I know that they can attract but just wanted to know in an instance where charges wouldn't attract. Thanks for the replys
    Last edited by a moderator: Mar 29, 2017
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