Answered: Alternating current electricity is…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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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.

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

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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