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Help me! somebody explain this to me!(Gauss's Law)

  1. Jul 12, 2005 #1
    i have a couple of questions and evryone can answer and explain it to me..

    1. what are the practical consequences of the observation that the electric field inside a hollow conductor is zero regardless of how much electric charge is placed on its outer surface? what does this imply regarding the safety of a person inside an automobile in a thunderstorm?

    2. is the electric field inside an empty cavity in a conductor zero? Why or why not?
  2. jcsd
  3. Jul 12, 2005 #2
    1) Shielding.. look into this.

    2) Yes, of course. Since there is no net charge inside the cavity, Gauss' law says there cannot be an electric field.
  4. Jul 12, 2005 #3
    1) This phenomenon is known as " Electrostatic Shielding' as per which the charge(s) inside a conductor are shielded from outside electric influences.The consequences include:

    i)Electric Field Vector on the surface of the conductor is always prependicular to the surface

    ii) The net field inside a conductor is zero.

    iii) Because the charges on a conductor rest on the surface, there are no charges in the cavity inside the conductor and hence no electric field as per Gauss Law.

  5. Jul 12, 2005 #4


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    Please do not multiple post!

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