Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
9th Edition
ISBN: 9781259989452
Author: Hayt
Publisher: Mcgraw Hill Publishers
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Question
Chapter 11, Problem 41E
(a)
To determine
Find the power factor of the load for the circuit in Figure 11.44 in the textbook when the load is purely resistive.
(b)
To determine
Find the power factor of the load in the given circuit when the load is
(c)
To determine
Find the power factor of the load in the given circuit when the load is
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Section 11.8
Power Factor Correction
11.69 Refer to the circuit shown in Fig. 11.88.
(a) What is the power factor?
(b) What is the average power dissipated?
(c) What is the value of the capacitance that will give
a unity power factor when connected to the load?
120 V rms
Z 10 +j122
60 Hz
11.75 Consider the power system shown in Fig. 11.90. Calculate:
(a) the total complex power
(b) the power factor
(c) the parallel capacitance necessary to establish a unity power factor
O-
+
240 V rms, 50 Hz
-
Figure 11.90
For Prob. 11.75.
80-j50 92
120 + j70 Ω
60+j0 22
11.33 For the following voltage and current phasors,
calculate the complex power, apparent power, real
power, and reactive power. Specify whether the pf is
leading or lagging.
(a) V = 220/30° V mms, I = 0.5/60° A rms
(b) V=250/-10° V rms,
1= 6.2/-25° Arms
(c) V = 120/0° V rms, I = 2.4/-15° Arms
(d) V = 160/45° V rms, I = 8.5/90° Arms
Chapter 11 Solutions
Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
Ch. 11.1 - A current source of 12 cos 2000t A, a 200 ....Ch. 11.2 - Given the phasor voltage across an impedance ,...Ch. 11.2 - Prob. 3PCh. 11.2 - Prob. 4PCh. 11.2 - A voltage source vs is connected across a 4...Ch. 11.3 - If the 30 mH inductor of Example 11.7 is replaced...Ch. 11.4 - Calculate the effective value of each of the...Ch. 11.5 - For the circuit of Fig. 11.16, determine the power...Ch. 11.6 - Prob. 10PCh. 11 - Prob. 1E
Ch. 11 - Determine the power absorbed at t = 1.5 ms by each...Ch. 11 - Calculate the power absorbed at t = 0, t = 0+, and...Ch. 11 - Three elements are connected in parallel: a 1 k...Ch. 11 - Let is = 4u(t) A in the circuit of Fig. 11.28. (a)...Ch. 11 - Prob. 6ECh. 11 - Assuming no transients are present, calculate the...Ch. 11 - Prob. 8ECh. 11 - Prob. 9ECh. 11 - Prob. 10ECh. 11 - The phasor current I=915mA (corresponding to a...Ch. 11 - A phasor voltage V=10045V (the sinusoid operates...Ch. 11 - Prob. 13ECh. 11 - Prob. 14ECh. 11 - Find the average power for each element in the...Ch. 11 - (a) Calculate the average power absorbed by each...Ch. 11 - Prob. 17ECh. 11 - Prob. 18ECh. 11 - Prob. 19ECh. 11 - The circuit in Fig. 11.36 has a series resistance...Ch. 11 - Prob. 21ECh. 11 - Prob. 22ECh. 11 - Prob. 23ECh. 11 - Prob. 24ECh. 11 - Prob. 25ECh. 11 - Prob. 26ECh. 11 - Prob. 27ECh. 11 - Prob. 28ECh. 11 - Prob. 29ECh. 11 - Prob. 30ECh. 11 - Prob. 31ECh. 11 - Prob. 32ECh. 11 - Prob. 33ECh. 11 - (a) Calculate both the average and rms values of...Ch. 11 - Prob. 35ECh. 11 - FIGURE 11.43 Calculate the power factor of the...Ch. 11 - Prob. 37ECh. 11 - Prob. 38ECh. 11 - Prob. 40ECh. 11 - Prob. 41ECh. 11 - Prob. 42ECh. 11 - Prob. 43ECh. 11 - Compute the complex power S (in polar form) drawn...Ch. 11 - Calculate the apparent power, power factor, and...Ch. 11 - Prob. 46ECh. 11 - Prob. 48ECh. 11 - Prob. 49ECh. 11 - Prob. 50ECh. 11 - Prob. 51ECh. 11 - Prob. 52ECh. 11 - FIGURE 11.49 Instead of including a capacitor as...Ch. 11 - Prob. 54ECh. 11 - A load is drawing 10 A rms when connected to a...Ch. 11 - For the circuit of Fig. 11.50, assume the source...Ch. 11 - Prob. 57ECh. 11 - A source 45 sin 32t V is connected in series with...Ch. 11 - Prob. 60ECh. 11 - FIGURE 11.51 The circuit in Fig. 11.51 uses a Pi...Ch. 11 - Prob. 62ECh. 11 - Prob. 63ECh. 11 - You would like to maximize power transfer to a 50 ...
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Similar questions
- Asaparrow_forwardExample 11.8. An alternating current is given by; i = 10 sin 942 t Determine the time taken from t = 0 for the current to reach a value of + 6 A for a first and second time.arrow_forwardPRACTICE PROBLEM 11.4 Calculate the average power absorbed by each of the five elements in the circuit of Fig. 11.6. 40/0° V Figure 11.6 8 Ω www j4 92 m -j2 92 For Practice Prob. 11.4. 20/90° V Answer: 40-V Voltage source: -100 W; resistor: 100 W; others: 0 W.arrow_forward
- 11.18 Find the value of Zy in the circuit of Fig. 11.49 for maximum power transfer. 40 Ω j40 Ω ell Figure 11.49 For Prob. 11.18. 40 Ω Μ + #)60/0° V 80 Ω 4)5/0° A : -j10 Ω ZLarrow_forward11.85 A regular household system of a single-phase three- wire circuit allows the operation of both 120-V and 240-V, 60-Hz appliances. The household circuit is modeled as shown in Fig. 11.96. Calculate: (a) the currents I₁, I₂, and I, (b) the total complex power supplied (c) the overall power factor of the circuit 120/0° V 120/0° V In 1₂ 10 22 10 Ω 15 mH wwww wwwm Lamp 30 92 Refrigerator www Kitchen ramparrow_forwardFind the rms value of the current waveform of Fig. 11.15. If the current flows through a 9- resistor, calculate the average power absorbed by the resistor. Answer: 4.318 A, 192 W. Practice Problem 11.7 i(1) A M. 4 5 6 0 1 2 3 Figure 11.15 For Practice Prob. 11.7.arrow_forward
- 11.52 In the circuit of Fig. 11.71, device A receives 2 kW at 0.8 pf lagging, device B receives 3 kVA at 0.4 pf leading, while device C is inductive and consumes 1 kW and receives 500 VAR. (a) Determine the power factor of the entire system. (b) Find I given that V₁ = 240/45° V rms. Figure 11.71 For Prob. 11.52. Vs I B A Uarrow_forwardRefer to the circuit shown in Fig. 11.88. (a) What is the power factor? (b) What is the average power dissipated? (c) What is the value of the capacitance that will give a unity power factor when connected to the load? 120 V rms 60 Hz Ζ = 10 + j 12 Ωarrow_forward4. Three transformers each rated 100KVA, supplies it rated value to a load having a pf of 0.8 lagging. If an induction motor rated 10HP, 0.8 lagging and 90% efficient is added to the initial load, determine the kvar value of capacitor bank necessary to prevent the overloading of transformers.arrow_forward
- 11.19 The variable resistor R in the circuit of Fig. 11.50 is adjusted until it absorbs the maximum average power. Find R and the maximum average power absorbed. j1Ω 3 Figure 11.50 For Prob. 11.19. 392 www 4/0° A wwww -j2Q2 692 Rarrow_forward7. For the circuit shown below: a) Calculate the real and reactive power associated with each circuit element. b) Is the average power generated equals the average power absorbed? c) Is the magnetizing vars generated equal the magnetizing vars absorbed? Is-10 5 Ω Vo≤80 15/0° A 2.51arrow_forwardHW22 Obtain the complex power delivered to the 10-kN resistor in Fig. 11.77 below. 500 2 I, -j3 k2 jika ll ww 0.6/0° V ms 201, 4 k2 10 k2 Figure 11.77 For Prob. 11.58. ww wwarrow_forward
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