A 2.5 nC point charge is placed at the center of a conductin…
A 2.5 nC point charge is placed at the center of a conducting spherical shell of inner radius = 2.0 cm and outer radius = 4.0 cm. The shell itself has a net charge of -1.1 nC. Determine the magnitude of the electric field at a point which is 6.0 cm from the point charge. (Express your answer in S.I.)