Laboratory Manual for Introductory Circuit Analysis
13th Edition
ISBN: 9780133923780
Author: Robert L. Boylestad, Gabriel Kousourou
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 4, Problem 53P
A stereo system draws 1.8 A at 120 V. The audio output power is 50 W.
- How much power is lost in the form of heat in the system?
- What is the efficiency of the system?
Expert Solution & Answer
Learn your wayIncludes step-by-step video
schedule02:15
Students have asked these similar questions
Q1 .Determine the model of the following system using Mason's rule
A three-phase delta-connected load, each phase of which
has an inductive reactance of 40 Ω and a resistance
of 25 Ω, is fed from the secondary of a three-phase
star-connected transformer which has a phase voltage
of 230 V. Draw the circuit diagram of the system and
calculate: (a) the current in each phase of the load; (b)
the p.d. across each phase of the load; (c) the current
in the transformer secondary windings; (d) the total
active power taken from the supply and its power factor.
ANS= 8.8 A, 416 V, 15.25 A, 5810 W
"I need something clear written by hand
with steps."
Find Laplace transform and the corresponding ROC for
x(t) = e−3sin(2t) u(t)dt
Chapter 4 Solutions
Laboratory Manual for Introductory Circuit Analysis
Ch. 4 - What is the voltage across a 220 resistor if the...Ch. 4 - What is the current through a 2.20 resistor if the...Ch. 4 - How much resistance is required to limit the...Ch. 4 - At starting, what is the current drain on a 12 V...Ch. 4 - If the current through a 100k resistor is 3.6A...Ch. 4 - If a voltmeter has an internal resistance of 50k...Ch. 4 - If a refrigerator draws 2.2 A at 120 V, what is...Ch. 4 - If a clock has an internal resistance of 8k find...Ch. 4 - A washing machine is rated at 4.2 A at 120 V. What...Ch. 4 - A CD player draws 80 mA when 4.5 V is applied....
Ch. 4 - The input current to a transistor is 20A If the...Ch. 4 - Prob. 12PCh. 4 - If an electric heater draws 9.5 A when connected...Ch. 4 - In a TV camera, a current of 5.6 mA passes through...Ch. 4 - Plot the curve of I (vertical axis) versus...Ch. 4 - Plot the I-V curve for a 5 and a 20 resistor on...Ch. 4 - Prob. 17PCh. 4 - Sketch the internal resistance characteristics of...Ch. 4 - Plot the I-V characteristics of a 1k,10k, and a 1M...Ch. 4 - If 540 J of energy are absorbed by a resistor in...Ch. 4 - The power to a device is 40 joules per second...Ch. 4 - How many joules of energy does a 8 W nightlight...Ch. 4 - How long must a steady current of 1.4 A exist in a...Ch. 4 - What is the power delivered by a 12 V battery if...Ch. 4 - The current through a 4k resistor is 7.2 mA. What...Ch. 4 - The power consumed by a 2.2k resistor is 240 mW....Ch. 4 - What is the maximum permissible current in a 82,...Ch. 4 - The voltage drop across a transistor network is 22...Ch. 4 - If the power applied to a system is 10 kW, what is...Ch. 4 - A 1 W resistor has a resistance of 4.7M . What is...Ch. 4 - A 2.2k resistor in a stereo system dissipates 42...Ch. 4 - What are the hot resistance level and current...Ch. 4 - What are the internal resistance and voltage...Ch. 4 - A calculator with an internal 3 V battery draws...Ch. 4 - A 20k resistor has a rating of 100 W. What are the...Ch. 4 - What is the total horsepower rating of a series of...Ch. 4 - A 10 resistor is connected across a 12 V battery....Ch. 4 - How much energy in kilowatthours is required to...Ch. 4 - How long can a 1500 W heater be on before using...Ch. 4 - A 60 W bulb is on for 10 h. a. What is the energy...Ch. 4 - In 10 h an electrical system converts 1200 kWh of...Ch. 4 - At 12/kWh how long can you play a 250 W color...Ch. 4 - The electric bill for a family for a month is...Ch. 4 - How long can you use an Xbox 360 for $1 if it uses...Ch. 4 - The average plasma screen TV draws 339 W of power,...Ch. 4 - The average PC draws 78 W. What is the cost of...Ch. 4 - If a house is supplied with 120 V, 100 A service,...Ch. 4 - What is the total cost of using the following at...Ch. 4 - What is the total cost of using the following at...Ch. 4 - Prob. 50PCh. 4 - The motor of a power saw is rated 72% efficient....Ch. 4 - What is the efficiency of a dryer motor that...Ch. 4 - A stereo system draws 1.8 A at 120 V. The audio...Ch. 4 - Prob. 54PCh. 4 - Prob. 55PCh. 4 - An electric motor used in an elevator system has...Ch. 4 - The motor used on a conveyor belt is 85%...Ch. 4 - Prob. 58PCh. 4 - The overall efficiency of two systems in cascade...Ch. 4 - What is the total efficiency of three systems in...Ch. 4 - If the total input and output power of two systems...Ch. 4 - Using PSpice 0r Multisim, repeat the analysis of...Ch. 4 - Using PSpice or Multisim, repeat the analysis of...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
What is denormalization?
Database Concepts (8th Edition)
What is pseudocode?
Starting Out With Visual Basic (8th Edition)
What is the difference between application software and utility software?
Computer Science: An Overview (13th Edition) (What's New in Computer Science)
For each of the conditions in Problem l, could some form of post-weld processing be used to restore desirable p...
Degarmo's Materials And Processes In Manufacturing
Repeat the previous question, but this time assume that you do not know whether the array a is full. If the arr...
Java: An Introduction to Problem Solving and Programming (8th Edition)
Big data Big data describes datasets with huge volumes that are beyond the ability of typical database manageme...
Management Information Systems: Managing The Digital Firm (16th Edition)
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
- Three similar coils, connected in star, take a total power of 1.5 kW, at a power factor of 0.2, from a three-phase, 400 V, 50 Hz supply. Calculate: (a) the resistance and inductance of each coil; (b) the line currents if one of the coils is short-circuited.arrow_forward(a) Three 20 µF capacitors are star-connected across a 400 V, 50 Hz, three-phase, three-wire supply. Calculate the current in each line. (b) If one of the capacitors is short-circuited, calculate the line cur rents. (c) If one of the capacitors is open-circuited, calculate: the line currents and the p.d. across each of the other two capacitors. ANS: 1.525 A; 2.64 A, 2.64 A, 4.57 A; 1.32 A, 1.32 A, 0; 210 Varrow_forwardExplain the advantages of three-phase supply for distribution purposes. (b) Assuming the relationship between the line and phase values of currents and voltages, show that the active power input to a three-phase balanced load is √3VI cos φ, where V and I are line quantities. (c) Three similar inductors, each of resistance 10 Ω and inductance 0.019 H, are delta-connected to a three-phase, 400 V, 50 Hz sinusoidal supply. Calcu late: the value of the line current; the power factor and the active power input to the circuit. ANS: 59.5 A, 0.858 lag, 35.5 kWarrow_forward
- not use ai pleasearrow_forwardA three-phase, 400 V, star-connected motor has an output of 50 kW, with an efficiency of 90 per cent and a power factor of 0.85. Calculate the line current. Sketch a phasor diagram showing the voltages and currents. If the motor windings were connected in mesh, what would be the correct voltage of a three phase supply suitable for the motor? ANS: 90.8 A, 240 Varrow_forwardDon't use ai to answer I will report you answerarrow_forward
- Show with the aid of a phasor diagram that for both star- and delta-connected balanced loads, the total active power is given by √3VI cos φ, where V and I are the line values of voltage and current respectively and φ is the angle between phase values of voltage and current. A balanced three-phase load consists of three coils, each of resistance 4 Ω and inductance 0.02 H. Determine the total active power when the coils are (a) star-connected, (b) delta-connected to a 400 V, three phase, 50 Hz supply. ANS:11.56 kW, 34.7 kWarrow_forwardThe load connected to a three-phase supply comprises three similar coils connected in star. The line currents are 25 A and the apparent and active power inputs are 20 kVA and 11 kW respectively. Find the line and phase voltages, reactive power input and the resistance and reactance of each coil. If the coils are now con nected in delta to the same three-phase supply, calculate the line currents and the active power taken. ANS : 462 V, 267 V, 16.7 kvar, 5.87 Ω, 8.92 Ω; 75 A, 33 kWarrow_forwardA three-phase delta-connected load, each phase of which has an inductive reactance of 40 Ω and a resistance of 25 Ω, is fed from the secondary of a three-phase star-connected transformer which has a phase voltage of 230 V. Draw the circuit diagram of the system and calculate: (a) the current in each phase of the load; (b) the p.d. across each phase of the load; (c) the current in the transformer secondary windings; the total active power taken from the supply and its power factor.arrow_forward
- Derive the numerical relationship between the line and phase currents for a balanced three-phase delta connected load. Three coils are connected in delta to a three-phase, three-wire, 400 V, 50 Hz supply and take a line current of 5 A 0.8 power factor lagging. Calculate the resistance and inductance of the coils. If the coils are star-connected to the same supply, calculate the line current and the total power. Calculate the line cur rents if one coil becomes open-circuited when the coils are connected in star. Ans: 110.7 Ω, 0.264 H; 1.67 A, 926 W; 1.445 A, 1.445 A, 0arrow_forwardDerive, for both star- and delta-connected systems, an expression for the total power input for a balanced three-phase load in terms of line voltage, line current and power factor. The star-connected secondary of a transformer supplies a delta-connected motor taking a power of 90 kW at a lagging power factor of 0.9. If the volt age between lines is 600 V, calculate the current in the transformer winding and in the motor winding. Draw circuit and phasor diagrams, properly labelled, showing all voltages and currents in the transformer secondary and the motor. ANS: . 96.2 A, 55.6 Aarrow_forwardDeduce the relationship between the phase and the line voltages of a three-phase star-connected generator. If the phase voltage of a three-phase star-connected generator is 200 V, what will be the line voltages: (a) when the phases are correctly connected; (b) when the connections to one of the phases are reversed? ans: 346 V; 346 V, 200 V, 200 Varrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage Learning
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Cengage Learning
What is an electric furnace and how does it work?; Author: Fire & Ice Heating and Air Conditioning Inc;https://www.youtube.com/watch?v=wjAWecPGi0M;License: Standard Youtube License