Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
9th Edition
ISBN: 9781259989452
Author: Hayt
Publisher: Mcgraw Hill Publishers
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Textbook Question
Chapter 11.5, Problem 9P
For the circuit of Fig. 11.16, determine the power factor of the combined loads if ZL = 10 Ω.
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Students have asked these similar questions
The load on a 120-V, 60 Hz supply is 5KW (resistive), 8 KVAR (inductive), and 2 KVAR (capacitive).
Find the following:
a) total kilovolt-amperes,
b)power factor of the combined loads,
c) current drawn from the supply,
d) capacitance needed to establish unity power factor,
e) capacitive reactance needed to establish unity power factor,
f) the current drawn from the supply at unity p.f.
HW15
11.16 For the circuit of Fig. 11.47, find the maximum
power delivered to the load Zr.
0.5 vo
ww
ww
160 cos 41 V
1 H
ll
HW25
11.74 A 120-V ms 60-Hz source supplies two loads
connected in parallel, as shown in Fig. 11.89.
(a) Find the power factor of the parallel combination.
(b) Calculate the value of the capacitance connected
in parallel that will raise the power factor to unity.
Load 1
Load 2
24 kW
40 kW
pf = 0.8
lagging
pf = 0.95
lagging
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- A 230 V, 50 Hz power source is connected to the some loads, where: • Load-1: R = 4.5 Q and in series connection with L = 8 mH. • Load-2: 10 kVA of power factor 0.6 lagging. • Load-3: 5 KVAR of power factor 0.5 lagging. (i) Determine the active power and reactive power of the Load-1. (ii) Determine the total current delivers by the supply and the total power factor. (iii) Calculate the required capacitor in order to increase the power factor to unity.arrow_forwardFor the circuit in Fig. 11.47, find the value of ZL that will receive the maximum power from the circuit. Then calculate the power delivered to the load ZL.arrow_forwardProblem #4: A company needs to improve its power factor to 0.95 lagging by connecting a 3-phase capacitor bank at a 3-phase motor drawing 50 kVA at 0.85 power factor lagging from a 230-V source. Find the required KVAR rating of the capacitor bank, the line current before and after the capacitors are added.arrow_forward
- A single-phase, 60-Hz supply is connected to a load consisting of a 100 Ω resistor in parallel with a 50-µF capacitor. Find the source power factor. (Make sure to indicate leading or lagging PF)arrow_forwardHW16 11.18 Find the value of Z, in the circuit of Fig. 11.49 for maximum power transfer. 40 Ω 60/0° V -j10 2 40 Ω 80 2 ww j20 Ω 5/0° Aarrow_forward11.15 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 ZLarrow_forward
- Two single-phase alternators operating in parallel supply a load with an impedance of (3 + j4) Ω. The excitation of the machines is such that the induced emfs are 110 V and 100 V respectively. The synchronous reactance of each machine is 1 Ω. Calculate the power supplied by each machine.arrow_forwardPractice Problem 11.5 For the circuit shown in Fig. 11.10, find the load impedance Z, that absorbs the maximum average power. Calculate that maximum aver- -j4 2 j102 age power. ell Answer: 3.415 - j0.7317 N, 51.47 Ww. 82 12 A 50 Figure 11.10 For Practice Prob. 11.5.arrow_forwardQ2) A three phase load (motor) draws 30 kW when connected to 440 V rms, 50 Hz line if the power factor is 0.85 lagging, Determine: a) The line current drawn by the motor. b) The KVAR rating of the three capacitors - connected in parallel with the motor that will raise the power factor to 0.95 lagging, and c) The capacitance of each capacitor.arrow_forward
- A load in a factory consists of the following i. 9kW of lighting at unity power factor ii. A 12kVa motor at 0.75 p.f. lagging iii. A number of small motors taking 15kW at 0.6 p.f. lagging. The loads are balanced over the three phases of a 414V supply system. Determine A. The total kW B. The total kVar C. The overall kVa D. The overall power factor E. The line current. F. Draw the final power triangle of the combined loadarrow_forwardASAparrow_forward1. A motor load consists of a resistance of 6 Ohms in series with an inductance of 12 mH. Assume 120Vac, 60 Hz supply. a. What is the complex impedance of the load? b. What is the ac current through this load? c. What is theta, the angle between voltage and current through this load? d. What is the power factor? e. What capacitance should be added in parallel with this load to correct the power factor to 1? f. What is the current from the supply when the power factor is corrected?arrow_forward
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