A 40-PC Point Charge Is Placed at the Center of a a Hollow

Multiple Choice

A 4.0-pC point charge is placed at the center of a hollow (inner radius = 2.0 cm, outer radius = 4.0 cm) conducting sphere which has a net charge of 4.0 pC. Determine the magnitude of the electric field at a point which is 6.0 cm from the point charge.

A) 35 N/C
B) 25 N/C
C) 30 N/C
D) 20 N/C
E) 10 N/C