9) When a capacitor is connected to an a.c. supply the current (a) leads the voltage by 180° (b) is in phase with the voltage (d) lags the voltage by 90° (c) leads the voltage by n/2 rad 10) In an R-L-C series a.c. circuit a current of 5 A flows when the supply voltage is 100 V. The phase angle between current and voltage is 60° lagging. Which of the following statements is false? (a) The circuit is effectively inductive (b) The apparent power is 500 VA (d) The true power is 250 W (c) The equivalent circuit reactance is 25 2

9) When a capacitor is connected to an a.c. supply the current (a) leads the voltage by 180° (b) is in phase with the voltage (d) lags the voltage by 90° (c) leads the voltage by n/2 rad 10) In an R-L-C series a.c. circuit a current of 5 A flows when the supply voltage is 100 V. The phase angle between current and voltage is 60° lagging. Which of the following statements is false? (a) The circuit is effectively inductive (b) The apparent power is 500 VA (d) The true power is 250 W (c) The equivalent circuit reactance is 25 2

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter23: Resistive-inductive-capacitive Series Circuits

Section: Chapter Questions

Problem 3PP: The circuit is connected to a 60-Hz line. The apparent power in the circuit is 29.985 VA, and the...

See similar textbooks

Similar questions

A 15-F AC capacitor is connected in series with a 50 resistor. The capacitor has a voltage rating of 600 WVDC. The capacitor and resistor are connected to a 480-V, 60-Hz circuit. Is the voltage rating of the capacitor sufficient for this connection?
List the five capacitor replacement rules.
A 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?
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.
Three capacitors having capacitance values of 20F,40F, and 50F are connected in parallel to a 60 - Hz power line. An ammeter indicates a circuit current of 8.6 amperes. How much current is flowing through the 40F capacitor?
What frequency must be applied to a 33-mH inductor to produce an inductive reactance of 99.526 ?
The circuit is connected to a 60-Hz line. The apparent power in the circuit is 29.985 VA, and the power factor is 62.5%. The resistor has a voltage drop of 14.993 V, the inductor has an inductive reactance of 60 , and the capacitor has a capacitive reactance of 45 . ETITZVA29.985PF62.5%ER14.993VIRRPELILXL60VARsLLECICXC45VARsCC
Which of the following is the capacitance of two 20-microfarad running capacitors connected in parallel? 10 microfarad 20 microfarad 30 microfarad 40 microfarad
An RC series circuit is connected to a 120-V, 60-Hz power source. The resistor is 25 and has a voltage drop of 65 volts. What is the capacitance of the capacitor?
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.
Two capacitors having values of 80 F and 60 F are connected in series. What is the total capacitance?
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?