A 10-nC point charge is located at the center of a thin spherical shell of radius 8.0 cm carrying -20 nC distributed uniformly over its surface.
Part A What is the magnitude of the electric field 2.0 cm from the point charge?
Part B What is the direction of the electric field in part (A)?
Part C What is the magnitude of the electric field 6.0 cm from the point charge?
Part D What is the direction of the electric field in part (C)?