Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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Textbook Question
Chapter 24, Problem 49P
Sketch three different ways that two wattmeters can be connected to measure the total power delivered to the load in Problem 17.
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Students have asked these similar questions
1. Why is there a wattmeter reading when the load is purely inductive?
2. Why is there no wattmeter reading when the load is purely capacitive?
In class B chopper, which of the given statement is true
The power flows always from load to source
The value of On time is always less than Off time
The duty cycle is always less one
The load current and voltage are always positive
Ae
Lr Ps Pr
Iyp
In the two-wattmeter method of measuring 3-phase power, the wattmeters indicate equal and opposite readings when load power factor is
O 90 leading
O 30 leading
O 60 lagging
30 lagging
Chapter 24 Solutions
Introductory Circuit Analysis (13th Edition)
Ch. 24 - A balanced V load having a 10 resistance in each...Ch. 24 - Repeat Problem 1 if each phase impedance is...Ch. 24 - Repeat Problem 1 if each phase impedance is...Ch. 24 - The phase sequence for the Y-Y system in Fig....Ch. 24 - Repeat Problem 4 if each phase impedance are...Ch. 24 - Repeat Problem 4 if each phase impedance is...Ch. 24 - For the system in Fig. 24.43, find the magnitude...Ch. 24 - Computer the magnitude of the voltage EAB for the...Ch. 24 - For the Y-Y system in Fig. 24.45: a. Find the...Ch. 24 - For the Y-Y system of Fig. 24.46 the impedance of...
Ch. 24 - A balanced load having a 20 resistance in each...Ch. 24 - Repeat Problem 11 if each phase impedance is...Ch. 24 - Repeat Problem 11 if each phase impedance is...Ch. 24 - The phase sequence for the Y- system in Fig....Ch. 24 - Repeat Problem 14 if each phase impedance is...Ch. 24 - Repeat Problem 14 if each phase impedance are...Ch. 24 - Prob. 17PCh. 24 - For the connected load in Fig. 24.49: a. Find the...Ch. 24 - A balanced V load having a 30 resistance in each...Ch. 24 - Repeat Problem 19 if each phase impedance is...Ch. 24 - Prob. 21PCh. 24 - Prob. 22PCh. 24 - Prob. 23PCh. 24 - Repeat Problem 22 if each phase impedance is...Ch. 24 - Prob. 25PCh. 24 - Prob. 26PCh. 24 - Prob. 27PCh. 24 - The phase sequence for the - system in Fig....Ch. 24 - Repeat Problem 28 if each phase impedance is...Ch. 24 - Repeat Problem 28 if each phase impedance is...Ch. 24 - Prob. 31PCh. 24 - Prob. 32PCh. 24 - Prob. 33PCh. 24 - Find the total watts, volt-amperes reactive,...Ch. 24 - Prob. 35PCh. 24 - Find the total watts, volt-amperes reactive,...Ch. 24 - Find the total watts, volt-amperes reactive,...Ch. 24 - Prob. 38PCh. 24 - Prob. 39PCh. 24 - Find the total watts, volt-amperes reactive,...Ch. 24 - A balanced, three-phase, -connected load has a...Ch. 24 - A balanced, three-phase, Y-connected load has a...Ch. 24 - Find the total watts, volt-amperes reactive,...Ch. 24 - The Y-Y system in Fig. 24.53 has a balanced load...Ch. 24 - Prob. 45PCh. 24 - Prob. 46PCh. 24 - Repeat Problem 46 for the network in Fig. 24.47.Ch. 24 - For the three-wire system in Fig. 24.55, properly...Ch. 24 - Sketch three different ways that two wattmeters...Ch. 24 - For the Y- system in Fig. 24.56: Determine the...Ch. 24 - For the system in Fig. 24.57: Calculate the...Ch. 24 - For the three-phase, three-wire system in Fig....
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- The ratio of the wattmeter readings in the 3- phase inductive system is 5:3 when power is measured by two watt meters. What is the power factor of the load?arrow_forwardVoltage and current of a three – phase load are as follows: Voltage: 3.6 kV, 8 degrees Current: 37 A, 45 degrees What is the power factor of this load?arrow_forwardMatch the following Each load wilI be connected between two phase wires Choose... Power measured by two wattmeter method Choose... Each load will be connected between a Phase wire and Neutral wire only unbalanced Load Both Balanced and Unbalanced Load Current in the neutral wire is zero Star connection Junction Point where one end of all three phase loads joined together Delta Point Delta connection Only Balanced Load Series Connection Neutral pointarrow_forward
- Why is there a wattmeter reading in the purely inductive load as recorded in the experiement. Explain brieflyarrow_forwardIn a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter is zero. The power factor of the load must be a. 0.3 b. Zero c. Unity d. 0.5arrow_forwardTwo 300-VA parallel-connected transformers can supply a maximum load of a. 150 VA b. 300 VA c. 450 VA d. 600 VAarrow_forward
- A three – phase load with 1.8 1.7 MVA and 0.92 0.85 leading power factor is connected to a 13.47 kV grid. What is the magnitude of the current of this load in Ampere?arrow_forward1. Find the average power drawn by each charge. Total average power drawn by the loadFind. 2. Find the total average power of the load using the 2 wattmeter method. You find on 1compare with the result.arrow_forwardIn a balanced three-phase load, each phase has A power consumption equal to (√3VL) IL One-third of total power Two-thirds of total power An equal amount of powerarrow_forward
- 1- Which of the following statement is TRUE ? a. True power is measured in VA b. All the power drawn by a resistive circuit is converted to useful work c. Apparent power and Reactive power are always equal d. True power cannot be measured using wattmeter 2- Which of the following statement is TRUE ? a. Bulb is considered as inductive load b. Loads such as transformers and motors consume reactive power with current waveform lagging the voltage c. Loads such as transformers and motors consume power with current waveform leading the voltage d. Heating element is example of capacitive loadarrow_forwardIn two-wattmeter method, the readings of the wattmeter will be identical when load in one of the two phases is zero power factor is unity neutral is earthed Power factor is 0.5arrow_forwardIn three phase power each voltage current and power is delivered by how many degrees..arrow_forward
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