Fundamentals of Electric Circuits
6th Edition
ISBN: 9780078028229
Author: Charles K Alexander, Matthew Sadiku
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 12, Problem 60P
Use PSpice or MultiSim to determine Io in the single-phase, three-wire circuit of Fig. 12.66. Let Z1 = 15 – j10 Ω, Z2 = 30 + j20 Ω, and Z3 = 12 + j5 Ω.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Three coils connected in series across a 100 V, 50 Hz supply have the followingparameters:R1 = 18 Ω, L1 = 0.012 H; R2 = 12 Ω, L2 = 0.036 H; R3 = 3.6 Ω, L3 = 0.072 HDetermine the potential drop and phase angle for each coil.
USE SERIES AC CIRCUITS METHOD NOT KIRCHOFF LAWS.
PLS SHOW COMPLETE SOLUTION AND ROUND OFF TO FOUR DECIMAL PLACES , WRITE LEGIBLY
PLS INLUDE ALSO THE CIRCUIT DIAGRAM:
17. For the network of Fig. 12.74:
a. Determine the mathematical expressions for the cur-
rent iz and the voltage V when the switch is closed.
b. Repeat part (a) if the switch is opened after a period
of five time constants has passed.
c. Sketch the waveforms of parts (a) and (b) on the same
set of axes.
R1
10 k2
20 V
R10 kn
10 mH VL
FIG. 12.74
ll
II.
Problem Solving
A 400 resistor is connected in parallel to a coil having a
resistance of 10 and an inductance of 3H. If a single-
phase AC voltage source having an instantaneous value of
v(t) = 35 sin(50t) V is connected across the parallel
connection, look for the following:
c. The total impedance of the connection
d. The phasor diagram showing the phase difference of the
source voltage and the total current
Chapter 12 Solutions
Fundamentals of Electric Circuits
Ch. 12.2 - Given that Vbn=22030V, find Van and Vcn, assuming...Ch. 12.3 - A Y-connected balanced three-phase generator with...Ch. 12.4 - One line voltage of a balanced Y-connected source...Ch. 12.5 - A positive-sequence, balanced -connected source...Ch. 12.6 - In a balanced -Y circuit, Vab=44015 and ZY = (12 +...Ch. 12.7 - For the Y-Y circuit in Practice Prob. 12.2,...Ch. 12.7 - Calculate the line current required for a 30-kW...Ch. 12.7 - Assume that the two balanced loads in Fig....Ch. 12.8 - The unbalanced -load of Fig. 12.24 is supplied by...Ch. 12.8 - Find the line currents in the unbalanced...
Ch. 12.9 - Prob. 11PPCh. 12.9 - For the unbalanced circuit in Fig. 12.32, use...Ch. 12.10 - Repeat Example 12.13 for the network in Fig. 12.24...Ch. 12.10 - Let the line voltage VL = 208 V and the wattmeter...Ch. 12.10 - If the load in Fig. 12.35 is delta-connected with...Ch. 12 - What is the phase sequence of a three-phase motor...Ch. 12 - If in an acb phase sequence, , then Vcn is:Ch. 12 - Which of these is not a required condition for a...Ch. 12 - Prob. 4RQCh. 12 - Prob. 5RQCh. 12 - In a Y-Y system, a line voltage of 220 V produces...Ch. 12 - In a - system, a phase voltage of 100 V produces a...Ch. 12 - When a Y-connected load is supplied by voltages in...Ch. 12 - Prob. 9RQCh. 12 - Prob. 10RQCh. 12 - If Vab = 400 V in a balanced Y-connected...Ch. 12 - What is the phase sequence of a balanced...Ch. 12 - Given a balanced Y-connected three-phase generator...Ch. 12 - A three-phase system with abc sequence and VL =...Ch. 12 - For a Y-connected load, the time-domain...Ch. 12 - Using Fig. 12.41, design a problem to help other...Ch. 12 - Obtain the line currents in the three-phase...Ch. 12 - In a balanced three-phase Y-Y system, the source...Ch. 12 - A balanced Y-Y four-wire system has phase voltages...Ch. 12 - For the circuit in Fig. 12.43, determine the...Ch. 12 - In the Y- system shown in Fig. 12.44, the source...Ch. 12 - Using Fig. 12.45, design a problem to help other...Ch. 12 - In the balanced three-phase Y- system in Fig....Ch. 12 - Obtain the line currents in the three-phase...Ch. 12 - The circuit in Fig. 12.48 is excited by a balanced...Ch. 12 - A balanced delta-connected load has a phase...Ch. 12 - A positive sequence wye-connected source where ,...Ch. 12 - If Van = 22060 V in the network of Fig. 12.49,...Ch. 12 - For the - circuit of Fig. 12.50, calculate the...Ch. 12 - Prob. 20PCh. 12 - Three 440-V generators form a delta-connected...Ch. 12 - Find the line currents IaA, IbB, and IcC in the...Ch. 12 - A balanced delta connected source is connected to...Ch. 12 - A balanced delta-connected source has phase...Ch. 12 - In the circuit of Fig. 12.54, if , , , find the...Ch. 12 - Using Fig. 12.55, design a problem to help other...Ch. 12 - A -connected source supplies power to a...Ch. 12 - The line-to-line voltages in a Y-load have a...Ch. 12 - A balanced three-phase Y- system has V rms and Z =...Ch. 12 - In Fig. 12.56, the rms value of the line voltage...Ch. 12 - A balanced delta-connected load is supplied by a...Ch. 12 - Design a problem to help other students better...Ch. 12 - A three-phase source delivers 4.8 kVA to a...Ch. 12 - A balanced wye-connected load with a phase...Ch. 12 - Three equal impedances, 60 + j30 each, are...Ch. 12 - A 4200-V, three-phase transmission line has an...Ch. 12 - The total power measured in a three-phase system...Ch. 12 - Given the circuit in Fig. 12.57 below, find the...Ch. 12 - Find the real power absorbed by the load in Fig....Ch. 12 - For the three-phase circuit in Fig. 12.59, find...Ch. 12 - A balanced delta-connected load draws 5 kW at a...Ch. 12 - A balanced three-phase generator delivers 7.2 kW...Ch. 12 - Refer to Fig. 12.48. Obtain the complex power...Ch. 12 - A three-phase line has an impedance of 1 + j3 per...Ch. 12 - A balanced wye-connected load is connected to the...Ch. 12 - A three-phase load consists of three 100-...Ch. 12 - The following three parallel-connected three-phase...Ch. 12 - A balanced, positive-sequence wye-connected source...Ch. 12 - Each phase load consists of a 20- resistor and a...Ch. 12 - A balanced three-phase source with VL = 240 V rms...Ch. 12 - Consider the wye-delta system shown in Fig. 12.60....Ch. 12 - A four-wire wye-wye circuit has...Ch. 12 - Using Fig. 12.61, design a problem that will help...Ch. 12 - A balanced three-phase Y-source with VP = 880 V...Ch. 12 - A three-phase supply, with the line-to-line...Ch. 12 - Using Fig. 12.63, design a problem to help other...Ch. 12 - Determine the line currents for the three-phase...Ch. 12 - Solve Prob. 12.10 using PSpice or MultiSim. For...Ch. 12 - The source in Fig. 12.65 is balanced and exhibits...Ch. 12 - Use PSpice or MultiSim to determine Io in the...Ch. 12 - Given the circuit in Fig. 12.67, use PSpice or...Ch. 12 - Using Fig. 12.68, design a problem to help other...Ch. 12 - Use PSpice or MultiSim to find currents IaA and...Ch. 12 - For the circuit in Fig. 12.58, use PSpice or...Ch. 12 - A balanced three-phase circuit is shown in Fig....Ch. 12 - A three-phase, four-wire system operating with a...Ch. 12 - As shown in Fig. 12.72, a three-phase four-wire...Ch. 12 - Meter readings for a three-phase wye-connected...Ch. 12 - A certain store contains three balanced...Ch. 12 - The two-wattmeter method gives P1=1200W and...Ch. 12 - In Fig. 12.73, two wattmeters are properly...Ch. 12 - If wattmeters W1 and W2 are properly connected...Ch. 12 - For the circuit displayed in Fig. 12.74, find the...Ch. 12 - Predict the wattmeter readings for the circuit in...Ch. 12 - Prob. 75PCh. 12 - Show that the I2R losses will be higher for a...Ch. 12 - A three-phase generator supplied 10 kVA at a power...Ch. 12 - Prob. 78CPCh. 12 - A balanced three-phase generator has an abc phase...Ch. 12 - A balanced three-phase source furnishes power to...Ch. 12 - A professional center is supplied by a balanced...Ch. 12 - A balanced three-phase system has a distribution...Ch. 12 - A commercially available three-phase inductive...Ch. 12 - Figure 12.76 displays a three-phase...Ch. 12 - Design a three-phase heater with suitable...Ch. 12 - For the single-phase three-wire system in Fig....Ch. 12 - Consider the single-phase three-wire system shown...
Knowledge Booster
Learn more about
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
- In the given circuit, the amplitude of the input voltage is 13 volts and its phase is 0 degrees.The values of the circuit elements are given below.What is the maximum average power that can be transferred to the ZL load?R = 3 ohmL = 5j ohmC = -6j ohmarrow_forwardAcross what direct emf must an impedance coil having a resistance of 20 ohms and an inductance of 0.05h be connected in order that it may take the same power that it takes from a 220V 60HZ mains? Α. 120V C. 150V B. 160V D. 140Varrow_forwardIn matlab, To obtain voltage and current waveforms from transmission line which tool can be used O a. voltage measurement O b. Three-phase VI measurment c. Series RLC branch O d. Parallel RLC loadarrow_forward
- An impedance coil is connected in parallel with a capacitance C of 12.5 μF. The input voltage to the circuit is 100 V at 31.8 Hz. The phase angle between the two branch currents (I1 and I2) is 120° and the current in the first branch is I1 = 0.5A. Determine the following:a) the current I2 and total currentb) the value of R and XLc) the value of inductor (L in mH)d) the total impedancee) the power factorf) the value of conductance (G in mƱ) and susceptance (B in Ʊ)g) total admittancearrow_forwardIn a R-C parallel circuit, total current is out of phase with the applied voltage." True False In a R-C parallel circuit, total current is out of phase with the applied voltage." True False In parallel-connected ac circuit, the value of the equivalent admittance of the circuit is equal to the phasor sum of the reciprocal of the individual admittances. " True Falsearrow_forwardA Star 3Phase source with phase voltage of 400V at 50HZ is connected to a delta connected 3Phase AC Motor. The transmisson line resistance from source to load terminal is 1 Ohm. The internal resistance of each winding of motor is 9 Ohm and the inductance of each coil is 38.2 mH. What is the true power delivered to load? O A) 15999 B) 14999 C) 13999 O D) Nonearrow_forward
- An AC system with the frequency of 60hz is composed of 2 relays with 20 ohms resistance and 0.16 henry inductance that are connected in series. What is the equivalent impedance?arrow_forwardA 60Hz, single-phase source with V=27730 volts is applied to a circuit element. (a) Determine the instantaneous source voltage. Also determine the phasor and instantaneous currents entering the positive terminal if the circuit element is (b) a 20 resistor. (C) a 10mH inductor, and (d) a capacitor with 25 reactance.arrow_forward13. A circuit is composed of a resistance of 22 ohms, an inductance of 0.11 henry and a capacitance of 12 microfarad, all connected in parallel to a 115-volt 60-Hz supply. Calculate the power factor of the circuit 0.877 lagging 0.918 lagging 0.918 leading 0.877 leadingarrow_forward
- The phase angle difference between the voltage and current in an AC circuit is 0. Which of the following is true? A The current lags the voltage by 0. B The angle between resistance and reactance is e. The angle between resistance and impedance is e. The current leads the voltage by 0.arrow_forwardan ac circuit has a frequency of 400 hz. a 16- ohms resistor, a 0.0119-h inductor, and a 16.6- uf capacitor are connected in series. If the voltage connected to the circuit is 440v. How many degrees are the voltage and current out of phase with each other?arrow_forwardA three-phase 400 V, 60 Hz delta connected load has three equal impedances each of (10+j50) Q2. What is the value of inductance?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Power System Analysis and Design (MindTap Course ...Electrical EngineeringISBN:9781305632134Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. SarmaPublisher:Cengage Learning
Power System Analysis and Design (MindTap Course ...
Electrical Engineering
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:Cengage Learning
Current Divider Rule; Author: Neso Academy;https://www.youtube.com/watch?v=hRU1mKWUehY;License: Standard YouTube License, CC-BY