Which statements about an electrostatically charged conductor are correct? A. Electric field inside the conducting material is zero. B. Electric field at its surface is independent of surface charge density. C. The interior of a conductor has no excess charge in electrostatic equilibrium. D. The electric field just outside its surface is normal to the surface. E. Electric potential inside the conductor is zero everywhere.
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Question

Which statements about an electrostatically charged conductor are correct? A. Electric field inside the conducting material is zero. B. Electric field at its surface is independent of surface charge density. C. The interior of a conductor has no excess charge in electrostatic equilibrium. D. The electric field just outside its surface is normal to the surface. E. Electric potential inside the conductor is zero everywhere.

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G1 Physics · Accepted Answer

Step 1: Electrostatic equilibrium requires E = 0 inside the bulk conducting material; A is true. Step 2: Just outside a conductor, E(normal) = σ/ε₀ (in vacuum), so the field depends on local surface-charge density; B is false. Step 3: Excess charge lies on the external surface in equilibrium, so the interior bulk carries no excess charge; C is true. Step 4: A tangential surface electric field would move free charges, so the external field must be perpendicular to the surface; D is true. Step 5:…