need short answers for this

Question 15 (14 marks) The emergency power supply of a hospital is shown below. Four diesel generators are connected in parallel which produces a combined voltage of 415 V and current of 80.0 A. The generators are attached to a step-up transformer which has a 1:60 turns ratio. The transformer transmits the electrical power through a 316 m transmission line to a second transformer, which steps down the voltage for use in the hospital. The transmission line has a resistance of 0.500 Q mrs. A schematic of the power distribution system is given below. Gen 1 1:60 415 V 0.500 0 m Gen 2 80.0 A Hospital Gen 3 Gen 4 Transformer Transformer (a) Explain the advantage of using a step-up transformer before transmitting electrical power over any significant distance. (3 marks) (b) Calculate the output voltage of the step-up transformer. (2 marks) Voltage: SEE NEXT PAGE Physics Units 3 & 4 13 (c) Assume the transformers are 95.0% efficient and the only significant losses come from the transformers and the transmission line. Calculate the power output from the step up transformer. (2 marks) Power: W The step down transformer receives 2.47x10* V. Calculate the power loss of the transmission line. (4 marks) Power. W (d) State one feature of a transformer that is designed to maximise the efficiency of the transformer and describe how the feature achieves the increase of efficiency