Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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Textbook Question
Chapter 20, Problem 11P
For the network of Fig. 20.58:
a. Find the average power delivered to each element.
b. Find the reactive power for each element.
c. Find the apparent power for each element.
d. Find the total number of watts, volt-amperes reactive, volt-amperes, and power factor Fp of the network.
Fig. 20.58
e. Sketch the power triangle.
f. Find the energy dissipated by the resistor over one full cycle of the input voltage.
g. Find the energy stored or returned by the capacitor and the inductor over one half-cycle of the power curve for each.
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AVERAGE POWER( NEED NEAT HANDWRITTEN SOLUTION ONLY OTHERWISE DOWNVOTE).
1. An electro-magnet draws 3 kW of active power and 4 kvar of reactive power.
a. Calculate the apparent power.
b. Calculate the power factor.
2. A capacitor drawing 4 kvar is placed in parallel with the electro-magnet of Question
1.
a. Calculate the new value of apparent power
b. What is the new value of reactive power?
c. What is the value of active power?
d. What is the new power factor?
Problem 4
An electric saw, a wood shaper, and a motor load of a workshop establish a 18 kVA power demand at 0.5
power factor lagging on a 208 V, 60 Hz supply.
a) Establish the power triangle for the load.
b) Determine the power-factor capacitor that must be place in parallel with the load to raise the power
factor to 0.9 lagging.
c) Determine the change in supply current from the uncompensated to the compensated system.
d) Determine the power-factor capacitor that must be placed in parallel with the load to raise the power
factor to unity.
Chapter 20 Solutions
Introductory Circuit Analysis (13th Edition)
Ch. 20 - For the battery of bulbs (purely resistive)...Ch. 20 - For the network of Fig. 20.49 : a. Find the...Ch. 20 - For the network of Fig. 20.50 : a. Determine the...Ch. 20 - For the system of Fig. 20.51 : a. Find the total...Ch. 20 - For the system of Fig. 20.52 : a. Find PT, QT. and...Ch. 20 - 6. For the system of Fig. 20.53 : a. Find PT, QT....Ch. 20 - For the network of Fig. 20.54 : a. Find the type...Ch. 20 - For the circuit of Fig. 20.55: a. Find the...Ch. 20 - For the network of Fig. 20.56 : a. Find Is. b....Ch. 20 - Repeat Problem 9 for the network of Fig. 20.57.
Ch. 20 - For the network of Fig. 20.58: a. Find the average...Ch. 20 - An electrical system is rated 10 kVA, 200 V at a...Ch. 20 - An electrical system is rated 5 kVA, 120 V, at a...Ch. 20 - For the system of Fig. 20.59: a. Find the total...Ch. 20 - Repeat Problem 14 for the system of Fig. 20.60.Ch. 20 - For the circuit of Fig. 20.61: Find the total...Ch. 20 - For the circuit of Fig. 20.62: Find the total...Ch. 20 - Prob. 18PCh. 20 - The load on a 120 V, 60 Hz supply is 5 kW...Ch. 20 - The loading of a factory on a 1000 V, 60 Hz system...Ch. 20 - a. A wattmeter is connected with its current coil...Ch. 20 - The voltage source in Fig. 20.64 delivers 660 VA...Ch. 20 - a. An air-core coil is connected to a 200 V, 60 Hz...Ch. 20 - a. The inductance of an air-core coil is 0.08 H....Ch. 20 - Using PSpice or Multisim, obtain a plot of...
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