Physics Alternating Current Level: University

Transmission of Current
An ac generator produces 10 A of current at 400 V. The voltager is stepped up to 4500 V by an ideal transformer and transmitted a long distance through a power line of total resistance 30.
(a) How much power is lost in transformer?
(b)If the voltage were not stepped up how much power would be lost in transmission?
(c) From your answer above is it more advantageous to transmit power at high or low voltage? Explain why?
(d) Why would a transformer not work if the current was direct instead of alternating? Explain fully.