Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
9th Edition
ISBN: 9781259989452
Author: Hayt
Publisher: Mcgraw Hill Publishers
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Chapter 11, Problem 17E
To determine
Find the average power supplied by the dependent source in the circuit.
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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
11.15 In the circuit of Fig. 11.46, find the value of Z, that
will absorb the maximum power and the value of the
maximum power.
120/0° V
192
wwwww
--/12
V./19
V₂
2V₂
ZL
11.21 Assuming that the load impedance is to be purely
resistive, what load should be connected to terminals
a-b of the circuits in Fig. 11.52 so that the maximum
power is transferred to the load?
100 Ω
-j10 Q2
a
120/60° V
Figure 11.52
For Prob. 11.21.
40 Ω
j3092
50 92
2/90° A
b
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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- 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° Armsarrow_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_forward11.75 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 22arrow_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_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_forwardIn Fig. 11.12, the resistor R, is adjusted until it absorbs the maximum average power. Calculate R, and the maximum average power absorbed by it. 80 42 j60 2 120/60° V -/30 2 Figure 11.12 For Practice Prob. 11.6. Answer: 300, 6.863 W. 90 £2 Practice Problem 11.6arrow_forward
- Find 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_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_forwardA resistor of 6 ohms and an unknown impedance coil in series draws 12 A from a 120 V, 60 Hz line. If the real power taken from the line is 1152 Watts, what is the coil inductance?arrow_forward
- (installed). 51. Calculate the complex power delivered to each passive component of the circuit shown in Fig. 11.49, and determine the power factor of the source. j30 92 50/-17° V rms FIGURE 11.49 ww +j25 Ω HE 1022 www at 15 22arrow_forwardCalculate the power factor of the entire circuit of Fig. 11.19 as seen by Practice Problem 11.10 the source. What is the average power supplied by the source? 10 2 82 Ar 165/0° V rms j42 Figure 11.19 For Practice Prob. 11.10.arrow_forwardAnswer 11.30arrow_forward
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