A Charge of 5

Multiple Choice

A charge of 5.0 pC is distributed uniformly on a spherical surface (radius = 2.0 cm) , and a second charge of −2.0 pC is distributed uniformly on a concentric spherical surface (radius = 4.0 cm) . Determine the magnitude of the electric field 3.0 cm from the center of the two surfaces.

A) 30 N/C
B) 50 N/C
C) 40 N/C
D) 20 N/C
E) 70 N/C