A 220−kV power transmission line carrying 500 A is hung from grounded metal towers by ceramic insulators, each having a 1.05×109Ω resistance (a) What is the resistance to ground of 40 of these insulators? (Assume the insulators are connected in parallel.) Ω (b) Calculate the power dissipated by 40 of them. W (c) What fraction of the power carried by the line is this?