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Permittivity (background reading from Wikipedia)

  1. Jul 16, 2009 #1
    Background reading from Wikipedia
    I read the following from Wikipedia,

    Question
    How does a dielectric's dipole becoming polarized
     
  2. jcsd
  3. Jul 16, 2009 #2

    berkeman

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    Staff: Mentor

    Look at the electric field between the separated parts of the dipole... doesn't it go the opposite way of the overall field?
     
  4. Jul 16, 2009 #3
    I am not sure, could you elaborate more. All I know as of now is that dipoles are not necessarily aligned, and when the electric field is applied (I think?), then the dipoles align.

    Thanks,


    JL
     
  5. Jul 16, 2009 #4

    negitron

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    Science Advisor

    Right. In what direction do they align, in terms of polarity, with respect to the applied external E field?
     
  6. Jul 16, 2009 #5
    The negative end of the dipole matches with (in the direction) of positive charges (capacitor or other dipoles)? And between a capacitor, could there be many dipoles spanning the distance between the two plates ?
     
  7. Jul 16, 2009 #6

    negitron

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    Science Advisor

    Okay, and when you have one electric field oriented in one direction and another in the opposite one the net field is...?
     
  8. Jul 16, 2009 #7
    Got it, zero (if they are equal-which they are in this situation).

    Thanks,


    Jeff
     
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