A thin rod L = 9.0 cm long is uniformly charged and has a total charge of 4.4 nC. Find the magnitude of the electric field at a point P located at a distance R = 13.5 cm from the center of the rod when:
(a) The point P lies along the axis of the rod
Electric field =___kN/C
(b) The point P lies perpendicularly to the axis of the rod
Electric field =___kN/C