Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 19, Problem 2PA
You are an electrician working in an industrial plant. You discover that the problem with a certain machine is a defective capacitor. The capacitor is connected to a 240-volt AC circuit. The information on the capacitor reveals that it has a capacitance value of 10 mF and a voltage rating of 240 VAC. The only 10-mF AC capacitor in the storeroom is marked with a voltage rating of 350 WVDC. Can this capacitor be used to replace the defective capacitor? Explain your answer.
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Basic Electrical Engineering: Inductance and Capacitance
You are an electrician working in an industrial plant. You discover the problem with a certain machine is a defective capacitor. The capacitor is connected to a 240-V AC circuit. The information on the capacitor reveals that it has a capacitance value of 10 µF and a voltage rating of 240 V AC. The only 10-µF capacitor in the storeroom is marked with a voltage rating 350 VDC. Can this capacitor be used to replace the defective capacitor? Explain your answer.
Basic Electrical Engineering: Inductance and Capacitance
You find that a 25-µF capacitor connected to a 480 V AC is defective. The storeroom has no capacitors with a 480 V AC rating. However, you find two capacitors rated at 50 µF and 370 V AC. Can these capacitors be connected in such a manner that they can replace the defective capacitor? If yes, explain how they are connected and why the capacitors will not be damaged by the lower voltage rating. If no, explain why they cannot be used without damage to the capacitor.
A 1.5-F capacitor in a television set is charged by a 22,000-V potential difference. To prevent
harm to the television repair technician, a large “bleeder” resistor is connected across the
capacitor’s ends. When the television set is turned off, the capacitor discharges through the bleeder
resistor rather than through the technician, who might accidentally touch its ends. (a) Calculate the
time needed to discharge 95 percent of the charge on the capacitor through a 1.0 MΩ resistor. (b)
What is the total charge that must be discharged?
Chapter 19 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 19 - 1. What is the dielectric?
Ch. 19 - List three factors that determine the capacitance...Ch. 19 - A capacitor uses air as a dielectric and has a...Ch. 19 - 4. In what form is the energy of a capacitor...Ch. 19 - Four capacitors having values of 20 F, 50 F, 40 F,...Ch. 19 - f the four capacitors in Question 5 were to be...Ch. 19 - A 22-F capacitor is connected in series with a...Ch. 19 - 8. A 450-pF capacitor has a total charge time of...Ch. 19 - Can a nonpolarized capacitor be connected to a DC...Ch. 19 - Explain how an AC electrolytic capacitor is...
Ch. 19 - What type of electrolytic capacitor will be...Ch. 19 - A 500-nF capacitor is connected to a 300-k...Ch. 19 - A film-type capacitor is marked 253 H. What are...Ch. 19 - A postage stamp mica capacitor has the following...Ch. 19 - A postage stamp capacitor has the following color...Ch. 19 - You are changing the starting relay on a central...Ch. 19 - You are an electrician working in an industrial...Ch. 19 - You find that a 25-F capacitor connected to 480...Ch. 19 - Fill in all the missing values. Refer to the...Ch. 19 - Two capacitors having values of 80 F and 60 F are...Ch. 19 - Three capacitors having values of 120 F, 20 F, and...Ch. 19 - Three capacitors having values of 2.2 F, 280 F,...Ch. 19 - A 470-F capacitor is connected in series with a...
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