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Capacitors:Basic Questions

  1. May 6, 2015 #1
    When voltage supply is removed from a parallel plate capacitor, why does the charge remain as before?
  2. jcsd
  3. May 6, 2015 #2


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    Staff: Mentor

    Because the charge has nowhere to go. It can't get through the dielectric, and there's no other path to the other plate.
  4. May 6, 2015 #3


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    Science Advisor
    Gold Member
    2017 Award

    to be a little more specific
    The charge on a capacitor never changes, that is, the net charge always = 0

    You should get used to using the more correct term of the capacitor being energised
    when an external voltage source is applied across the capacitor terminals

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