A coaxial cable has conductor dimensions of a = 1.0 mm and b = 2.7 mm. The inner conductor is supported by dielectric spacers (∈_r = 5) in the form of washers with a hole radius of 1 mm and an outer radius of 2.7 mm, and with a thickness of 3.0 mm. The spacers are located every 2 cm down the cable.

(a) By what factor do the spacers increase the capacitance per unit length?

(b) If 100 V is maintained across the cable, find E at all points.