A coaxial cable has the following specifications: a = 1.0mm, b = 3.2mm, spacer er = 2.1 The outer conductor is earthed and has thickness 0.2mm. The inner conductor is raised to a potential of 1kV, and balanced opposing charges allowed to accumulate on the conductor surfaces. (i) Show that the charge per unit length deposited on each conductor is approximately 100nC m (ii) Calculate the magnitude of the electric field IE| at radial positions 0.5mm, 1.0mm, 2mm, 3.2mm and 5mm from the midpoint. (ii) Sketch plots of |E](r) and $(r) with increasing radial distance from the cable axis.

A coaxial cable has the following specifications: a = 1.0mm, b = 3.2mm, spacer er = 2.1 The outer conductor is earthed and has thickness 0.2mm. The inner conductor is raised to a potential of 1kV, and balanced opposing charges allowed to accumulate on the conductor surfaces. (i) Show that the charge per unit length deposited on each conductor is approximately 100nC m (ii) Calculate the magnitude of the electric field IE| at radial positions 0.5mm, 1.0mm, 2mm, 3.2mm and 5mm from the midpoint. (ii) Sketch plots of |E](r) and $(r) with increasing radial distance from the cable axis.