College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 70

The dome of a Van de Graaffgenerator receives a charge of 2.0 × 10 4 C. Find the strength of the electric field (a) inside the dome, (b) at the surface of the dome, assuming it has a radius of 1.0 m, and (c) 4.0 m from the center of the dome. Hint: See Section 15.6 to review properties of conductors in electrostatic equilibrium. Also, note that the points on the surface are outside a spherically symmetric charge distribution; the total charge may be considered to be located at the center of the sphere.