Question

A long, nonconducting, solid cylinder of radius 4.0 cm has a nonuniform volume charge density that is a function of radial distance r from the cylinder axis and is equal to Ar2. For A=2.5μC/m5, what is the magnitude of the electric field in N/C field at a radial distance 0.064. m (bear in mind that the cylinder is very long!)

Answer 1