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 em and an outer radius of 2R : 2 cm. The wall or blue region is uniformly charged throughout its volume with charge density 1.6 uC/mu. 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. 3' : 1.8 cm '3 The permittivity of free space is m = 8.8542 x 10'12 C2/N - 1n2 and the volume of a cylinder with radius r and length f is V=xe Answer in units of N/C