College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 48

A high-voltage transmission line with a resistance of 0.31 /km carries a current of 1 000 A. The line is at a potential of 700 kV at the power station and carries the current to a city located 160 km from the station. (a) What is the power loss due to resistance in the line (b) What fraction of the transmitted power does this loss represent