Practice question

**Conductor in electrostatic equilibrium** has E=0 inside, charges reside on surface, potential constant throughout conductor. Hollow shell with no internal charge has zero field inside cavity, even if external field present, charges on outer surface screen interior, principle used in Faraday cage. When a dielectric is placed in an external field E₀ , it polarizes, creating bound charges that produce an internal field Eiₙducₑd opposing E₀ . The net field inside the dielectric is E = (E₀/K) , where K > 1 is the dielectric constant. For linear dielectrics, K > 1 , so E < E₀ , as the polarization reduces the effective field