A generating station is producing 1.2 x 106 W of power that is sent to a small town located 7.0 km away. Each of the two wires that comprise the transmission line has a resistance per kilometre of length of 5.0 x 10-2 Ω/km.

Find the resistance in 7.0 km of transmission line.
Find the current passing through 7.0 km of wire if the power is transmitted at 1200 V.
Find the power lost in heating the wires if the power is transmitted at 1200 V.
A 100:1 step-up transformer is used to raise the voltage before the power is transmitted. At what voltage is the power transmitted now?
Find the power lost in heating the wires at this new higher voltage.