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Dielectric material problem

  1. Oct 26, 2008 #1
    1. The problem statement, all variables and given/known data
    A fully charged parallel plat capacitor remains connected to a battery while a dielectric is slid between. Does the electric field increase, decrease, or remain the same?


    3. The attempt at a solution

    Don't know this one or how to show it. I know that potential difference is constant and the capacitance and charge will increase, but I can't figure out the E. field.
     
  2. jcsd
  3. Oct 26, 2008 #2

    Hootenanny

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    Re: Capacitance

    What happens to a dielectric material when it is placed in an external electric field?
     
  4. Oct 26, 2008 #3
    Re: Capacitance

    I am not sure
     
  5. Oct 26, 2008 #4

    Hootenanny

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    Re: Capacitance

    Well, what is a dielectric?
     
  6. Oct 26, 2008 #5
    Re: Capacitance

    a nonconducting material.
     
  7. Oct 26, 2008 #6

    Hootenanny

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    Re: Capacitance

    Erm... yes, but I meant on the atomic scale. In electromagnetism it is useful to think of dielectrics in a magnetic field as to be composed of dipoles. So, when you have a dipole in an electric field how does it tend to align itself with respect to the electric field?
     
  8. Oct 26, 2008 #7
    Re: Capacitance

    Not quite that far along yet. Is there a more simple solution? We haven't talked about dipoles or magnetic fields.
     
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