Consider a very long, cylindrical insulator in the shape of a pipe. In the gure below. this pipe is shown in cross-section. the length of the pipe extends into and out of the page. Note the pipe has a thick wall (blue region). The pipe's wall has an inner radius of R. : 1 cm and an outer radius of 2R 2 2 cm. The wall or blue region is uniformly charged throughout. its volume with charge density 1.6 [LC/m3. Note that there is no charge in the white region. What is the magnitude of the electric eld inside the insulator at a distance r from the central axis of the pipe. 7' 1.8 cm 1' The permittivity of free space is Eu : 8.8542 X 1012 C2/N - 1112 and the volume of a cylinder with radius r and length E is V = 7r 7'2 E . Answer in units of N/C