Charge of Uniform Density (80 NC/m³) Is Distributed Throughout a Hollow

Multiple Choice

Charge of uniform density (80 nC/m³) is distributed throughout a hollow cylindrical region formed by two coaxial cylindrical surfaces of radii 1.0 mm and 3.0 mm. Determine the magnitude of the electric field at a point which is 4.0 mm from the symmetry axis.

A) 7.9 N/C
B) 10 N/C
C) 9.0 N/C
D) 8.9 N/C
E) 17 N/C