question_answer 25)

Do the same exercise as above with the replacement of the earlier transformer by a 40,000 —220 V step-down transformer (Neglect, as before, leakage losses though, this may not be a good assumption any longer because of the very high voltage transmission involved). Hence, explain why high voltage transmission is preferred. 

Answer:

In this case on line                                 (a) Line power loss                 (b) Power supplied                 (c) Voltage dropped                 (d) Step up transformer should be                                 Power loss                 Thus, Power losses reduce a lot if is transmitted at high voltage.