Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 9, Problem 10RQ
What electrical quantity does the oscilloscope measure?
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Figure 1 shows a half-wave controlled rectifier which is supplied by a Vin = 120 Vrms voltage
source. Assume that the load resistance is R = 10 2. Determine:
a) The firing angle a of the thyristor to
produce an average output voltage 50Vdc.
Vin=Vmsinoot
b) The average power Po absorbed by the load R.
Figure 1
R = 1092
Q1. What is power dissipation in the Zener diode circuit given for
a) RL=100 Ohm ?
b) RL=∞
The one-line diagram of an unloaded power system is shown below.
Reactances of the two sections of transmission line are shown on the diagram.
The generators and transformers are rated as follows:
20 MVA, 13.8 kV, X = 0.20 p.u
Generator 1:
Generator 2:
Generator 3:
30 MVA, 18 kV, X = 0.20 p.u
Transformer Ti:
Transformer T2:
30 MVA, 20 kV, X = 0.20 p.u
25 MVA, 220Y/13.8A kV, X = 10%
Three single-phase units each rated 10
MVA, 127/18 kV, X = 10%
HT sides connected in wye
Transformer T3:
LT sides connected in delta
35 MVA, 220Y/22Y KV, X = 10%
j80 Q
j100 Q
Line 1
Line 2
T₁
T₂
Draw the impedance diagram with all reactances marked in per unit. Choose
a base of 50 MVA, 13.8 kV in the circuit of generator 1.
Chapter 9 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 9 - To what is the turning force of a dArsonval meter...Ch. 9 - Prob. 2RQCh. 9 - A DC voltmeter has a resistance of 20,000 per...Ch. 9 - 4. What is the purpose of an ammeter shunt?
Ch. 9 - 5. Name two methods used to make a DC multirange...Ch. 9 - 6. How is an ammeter connected into a circuit?
Ch. 9 - 7. How is a voltmeter connected into a circuit?
Ch. 9 - 8. An ammeter shunt has a voltage drop of 50 mV...Ch. 9 - 9. What type of meter contains its own separate...Ch. 9 - 10. What electrical quantity does the oscilloscope...
Ch. 9 - 11. What is measured on the Y axis of an...Ch. 9 - 12. What is measured on the X axis of an...Ch. 9 - 13. A waveform shown on the display of an...Ch. 9 - 14. What is the major difference between a...Ch. 9 - 15. What two factors determine the turning force...Ch. 9 - You are an electrician on the job. You have been...Ch. 9 - 1. A d'Arsonval meter movement has a full-scale...Ch. 9 - 2. The meter movement described in Question 1 is...Ch. 9 - 3. A meter movement has a full-scale value of . A...Ch. 9 - 4. The meter movement in Question 3 is to be used...Ch. 9 - 5. A digital voltmeter indicates a voltage of 2.5...
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