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.
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.
College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter20: Electric Current, Resistance, And Ohm's Law
Section: Chapter Questions
Problem 65PE: Integrated Concepts A light-rail commuter train draws 630 A of 650-V DC electricity when...
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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.
Transcribed Image Text:8. 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. This is shown in Fig. 8.1. Each transmission line has a resistance of 3 0.
a.
22000 V
i.
392
392
Fig. 8.1
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.
ii. State one advantage of delivering electrical energy at high voltage.
b. The power delivered by the generator is 55 kW. Calculate the current in the transmission
lines
Current =
C. Calculate the voltage drop across one of the transmission lines.
Voltage drop =
A
Transcribed Image Text:d. Calculate the rate of loss of energy from one of the 3 transmission lines, giving the units.
Rate of energy loss =
e. Calculate the potential difference V at the receiving end of the transmission lines.
V=
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