a) Sketch the electric field in the interior and the exterior of a spherical metal shell 6 cm in radius if the shell has a net charge of +10-8 Coulombs on its surface.
b) What is the electric field at r=0?
c) Find the surface charge density on the shell.
d) What is the electric field strength at the surface r = 6 cm?
e) What is the voltage at the surface of the sphere? Assume the potential goes to zero at infinity.
f) What is the voltage at the origin, r=0? How does it compare to the voltage at the surface r=6 cm? Justify your answer.