A voltage of 120kV, 50 Hz was applied to a two-layer core cable and the second layer was grounded. The diameter of the conductive part of the cable is 2 cm, the radius of the first layer on the cable is 2 cm, and the radius of the second layer is 4.2 cm. The relative dielectric constants of both layers are given as E1 = 3.8. Since the cable length is 6440 meters,
a.] Calculate the equivalent capacity of the system.
b.] Calculate the current flowing to the ground through the first layer potential and capacitances when the cable is below 120 kV.
c.] Calculate the reactive power produced by the capacities by determining at which point the maximum field strength occurs.