Which of the following statements is not valid in case of conductors in electrostatic fields?

Which of the following statements is not valid in case of conductors in electrostatic fields? A) The static electric field intensity inside a conductor is zero B) The static electric field intensity at the surface of a conductor is everywhere directed normal to the surface C) The conductor surface is an equivalent potential surface D) None of the above
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Which of the following statements is not valid in case of conductors in electrostatic fields? A) The static electric field intensity inside a conductor is zero B) The static electric field intensity at the surface of a conductor is everywhere directed normal to the surface C) The conductor surface is an equivalent potential surface D) None of the above

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