Alternating current electricity is delivered at 22 000 V to a pair of transmission lines. The transmission lines carry the electricity to the customer at the receiving end, where the potential difference is V. Each transmission line has a resistance of 3 Ohm. a. The a.c. generator actually generates at a much lower voltage than 22 000 V. Suggest how the voltage is increased to 22 000 V. b. Suggest one advantage of delivering electrical energy at high voltage. c. The power delivered by the generator is 55kW. Calculate the current in the transmission lines. d. Calculate the voltage drop across one of the transmission lines. e. Calculate the rate of loss of energy from one of the 3 Ohm transmission lines, giving the units. f. Calculate the potential difference V at the receiving end of the transmission lines.

Question

Alternating current electricity is delivered at 22 000 V to a pair of transmission lines. The transmission lines carry the electricity to the customer at the receiving end, where the potential difference is V. Each transmission line has a resistance of 3 Ohm.

a. The a.c. generator actually generates at a much lower voltage than 22 000 V. Suggest how the voltage is increased to 22 000 V.

b. Suggest one advantage of delivering electrical energy at high voltage.

c. The power delivered by the generator is 55kW. Calculate the current in the transmission lines.

d. Calculate the voltage drop across one of the transmission lines.

e. Calculate the rate of loss of energy from one of the 3 Ohm transmission lines, giving the units.

f. Calculate the potential difference V at the receiving end of the transmission lines.