Charge of Uniform Density 90 NC/m³ Is Distributed Throughout the Inside

Multiple Choice

Charge of uniform density 90 nC/m³ is distributed throughout the inside of a long nonconducting cylindrical rod (radius = 2.0 cm) . Determine the magnitude of the potential difference of point A (2.0 cm from the axis of the rod) and point B (4.0 cm from the axis) .

A) 1.9 V
B) 1.4 V
C) 2.2 V
D) 2.8 V
E) 4.0 V