question_answer 35)

  Electrical energy is transmitted over large distances at high alternating voltages. Which of the following statements is (are) correct? (a) For a given power level, there is a lower current (b) Lower current implies less power loss (c) Transmission lines can be made thinner (d) It is easy to reduce the voltage at the receiving end using step-down transformers

Answer:

  (a,b,c,d)Electrical energy is transmitted over large distances at high alternating voltages. As  therefore, for a given power level, current  is lower. Power loss = becomes low, even if transmission lines are thinner and R is a little high. At the receiving end, high voltages can be easily reduced using step down transformers. Choices (a), (b), (c), (d), all are correct.