Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 20, Problem 5PP
Three capacitors having capacitance values of
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Delmar's Standard Textbook Of Electricity
Ch. 20 - Can current flow through a capacitor?Ch. 20 - What two factors determine the capacitive...Ch. 20 - How many degrees are the current and voltage out...Ch. 20 - Does the current in a pure capacitive circuit lead...Ch. 20 - 5. A 30- capacitor is connected into a 240-V,...Ch. 20 - 6. A capacitor is connected into a 1250-V, 1000-Hz...Ch. 20 - 7. A capacitor is to be connected into a 480-V,...Ch. 20 - On the average, by what factor is the life...Ch. 20 - A capacitor is connected into a 277-V, 400-Hz...Ch. 20 - A capacitor has a voltage rating of 350 VAC. Can...
Ch. 20 - A utility company plans to connect a total of 20 F...Ch. 20 - What is the minimum AC voltage rating of each...Ch. 20 - What is the total current flow through the circuit...Ch. 20 - What is the minimum KVAR rating of each capacitor...Ch. 20 - You are working as an electrician in an industrial...Ch. 20 - You are working in an industrial plant. You have...Ch. 20 - Capacitive Circuits Fill in all the missing...Ch. 20 - A 4.7-F capacitor is connected to a 60-Hz power...Ch. 20 - A capacitor is connected to a 208-volt, 60-Hz...Ch. 20 - A 0.47-F capacitor is connected to a 240-volt...Ch. 20 - Three capacitors having capacitance values of...Ch. 20 - A capacitor has a capacitive reactance of 300 ...Ch. 20 - A pure capacitive circuit is connected to a...
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- You find that a 25-F capacitor connected to 480 VAC is defective. The storeroom has no capacitors with a 480-VAC rating. However, you find two capacitors rated at 50 F and 370 VAC. Can these two 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 damaging the capacitor.arrow_forwardA pure capacitive circuit is connected to a 480-volt, 60-Hz power source. An ammeter indicates a current flow of 24 amperes. The circuit current must be reduced to 16 amperes by connecting a second capacitor in series with the first. What is the value of the existing capacitor? What value capacitor should be connected in series with the original capacitor to limit the circuit current to 16 amperes?arrow_forwardA postage stamp mica capacitor has the following color marks starting at the upper left dot: yellow, violet, brown, green, no color, and blue. What are the capacitance value, tolerance, and voltage rating of this capacitor?arrow_forward
- You are working in an industrial plant. You have been instructed to double the capacitance connected to a machine. The markings on the capacitor, however, are not visible. The capacitor is connected to 560 volts and an ammeter indicates a current of 6 amperes flowing to the capacitor. What size capacitor should be connected in parallel with the existing capacitor? What is the minimum AC voltage rating of the new capacitor? What is the minimum DC voltage rating of the new capacitor? What is the minimum KVAR size that can be used in this installation?arrow_forwardIncandescent lighting of 500 W is connected in parallel with an inductive load. A clamp-on ammeter reveals a total circuit current of 7 A. What is the inductance of the load connected in parallel with the incandescent lights? Assume a voltage of 120 V and a frequency of 60 Hz.arrow_forwardWhat is the minimum AC voltage rating of each capacitor in Question 11?arrow_forward
- In a pure capacitive circuit, does the current lead or lag the voltage?arrow_forwardList the five capacitor replacement rules.arrow_forwardYou 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.arrow_forward
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