100 kW (105 W) of power is delivered to the other side of a city by a pair of power lines between which the voltage is 12,000 V.
a. How much current is carried in the lines?
b. Each of the two lines has a resistance of 10 Ω. What is the voltage difference between the two ends of each line? (Think carefully. This voltage is not that between the two lines.)
c. What power is wasted as heat in both lines together (distinct from power delivered to customers)? How does this compare with the power being delivered?