Which of the following statements are correct? A. Inside a conductor, the electrostatic field is zero. B. Electric field at the surface of a charged conductor does not depend on its surface charge density. C. The interior of a charged conductor can have no excess charge in the static situation. D. At the surface of a charged conductor, the electrostatic field must be normal to the surface at every point. E. The electrostatic potential is zero everywhere inside a charged conductor.

Solution & Explanation

Answer: (c) Solution: Apply the electrostatic properties of conductors: A. True — in the static situation, the field inside a conductor is zero. B. False — the field just outside the surface is E = σ/ε₀, which clearly depends on the surface charge density σ. C. True — any excess charge resides only on the surface; the interior has no net excess charge. D. True — at the surface, the field must be normal at every point (any tangential component would drive surface currents). E. False — the potential is constant throughout the conductor, but this constant value is generally non-zero, not zero. The correct statements are A, C and D → option (c).