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Charge inside conductor?

  1. Jun 3, 2014 #1
    As we know there is no charge inside the conductor.(Consider the solid conductor......)

    All the charge will distributed on the outer surface of the conductor.
    There is no charge inside the conductor

    My question is when we applied potential difference across this conductor then current will flow through this conductor. Here current constitute by the charge that will reside on the outer most surface ?
    since there is no charge inside the conductor because all the charge will reside on the outer most surface of the conductor.
    So that no current is flowing inside the conductor.
    This is the property of the conductor.
    If I am wrong explain it.
     
    Last edited: Jun 3, 2014
  2. jcsd
  3. Jun 3, 2014 #2
    No, we don't know this. Do yo think that all the electrons and protons of the atoms of the metal migrate to the surface? :)

    What we actually know is that there is no NET charge inside a conductor in STATIC equilibrium.
    This means the number of positive and negative charges is equal in any "small" volume. So there are many free electrons inside the metal. And an equal number of positive charges that are not so free.

    When we have a current some of the free charges (electrons) have a net drift through the metal.
    For low frequency current the motion happens pretty much in the whole volume.

    There is some net surface charge on the surface too. This produces the electric field that drives the current.
     
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