After completing this chapter, the student should be able to:


 Felicity Foster
 1 years ago
 Views:
Transcription
1 Inductance OBJECTIVES After completing this chapter, the student should be able to: Explain the principles of inductance. Identify the basic units of inductance. Identify different types of inductors. Determine the total inductance in series and parallel circuits. Explain L/R time constants and how they relate to inductance. See accompanying CD for interactive presentations and tutorials relating to Chapter 10. When a current flows through a conductor, a magnetic field builds up around the conductor. This field contains energy and is the foundation for inductance. This chapter examines inductance and its application to DC circuits. Inductance is covered in more detail in Chapter 16. INDUCTANCE Inductance is the characteristic of an electrical conductor that opposes a change in current flow. An inductor is a device that stores energy in a magnetic field. Inductance exhibits the same effect on current in an electric circuit as inertia does on velocity of a mechanical object. It takes more work to no start a load moving than it does to keep it moving because the load possesses the property of inertia. Inertia is the characteristic of mass that opposes a change in velocity. Once current is moving through a conductor, inductance helps to keep it moving. The effects of inductance are sometimes desirable and other times undesirable. As noted in Chapter 9, the basic principle behind inductance states, when a current flows through a conductor, it generates a magnetic field around the conductor As the magnetic flux lines build up, they create an opposition to the flow of current. When the current changes direction or stops, or the magnetic field changes, an electromotive force (emf) is induced back into the conductor through the collapsing of the magnetic field. The opposition to the changes in current flow is iden
2 CHAPTER 10 INDUCTANCE tified as counter electromotive force (counter emf). This effect is summarized by Lenz's lawan induced emf in any circuit is always in a direction to oppose the effect that produced it. The amount of counter emf is in proportion to the rate of change. The faster the rate of change, the greater the counter emf. All conductors have some inductance. The amount of inductance depends on the conductor and the shape of it. Straight wire has small amounts of inductance whereas coils of wire have much more inductance. The unit by which inductance is measured is the henry (H), named for Joseph Henry ( ), an American physicist. A henry is the amount of inductance required to induce an emf of 1 volt when the current in a conductor changes at the rate of 1 ampere per second. The henry is a large unit; the millihenry (mh) and microhenry (ILH) are more commonly used. The symbol for inductance is L. FIGURE 101 Schematic symbol for an inductor ~~ FIGURE 102 Schematic symbol for a variable inductor. ~ FIGURE 103 Several types of inductors used to vary the inductance QUESTIONS 1. Define inductance. 2. What is the unit for measuring inductance? 3. Define a henry. 4. What letter is used to represent inductance? FIXED INDUCTORS ImDINDUCTORS Inductors are devices designed to have a specific inductance. They consist of a conductor coiled around a core and are classifiedby the type of core materialmagnetic or nonmagnetic. Figure 101 shows the symbol used for inductors. Inductors can also be fixed or variable. Figure 102 shows the symbol for a variable inductor. Variable inductors are created with adjustable core material. Figure 103 shows several types of VARIABLE INDUCTORS
3 SECTION I DC CIRCUITS FIGURE 104 An aircore inductor. FIGURE 106 Toroidcore inductor. FIGURE 105 Schematic symbol for an ironcore inductor ~~ inductors used for adjusting the core material. Maximum inductance occurs when the core material is in line with the coil of the wire. Aircore inductors, or inductors without core material, are used for up to 5 millihenries of inductance. They are wrapped on a ceramic or phenolic core (Figure 104). Ferrite and powdered iron cores are used for up to 200 millihenries. The symbol used for an ironcore inductor is shown in Figure Toroid cores are donutshaped and offer a high inductance for a small size (Figure 106). The magnetic field is contained within the core. Shielded inductors have a shield made of magnetic material to protect them from the influence of other magnetic fields (Figure 107). Laminated ironcore inductors are used for all large inductors (Figure 108). These inductors vary from 0.1 to 100 henries, the inductance depending on the amount of current flowing through the inductor. These inductors are sometimes referred to as chokes. They are used in the filtering circuits of power supplies to remove AC FIGURE 107 Shielded inductor. components from the DC output. They will be discussed further later on. Inductors typically have tolerances of ± 10%, but tolerances of less than 1% are available. Inductors, like resistors, can be connected in series, parallel, or seriesparallel combinations. The total inductance of several inductors connected in se
4 CHAPTER 10 INDUCTANCE FIGURE 108 Laminated ironcore inductor. 5. What is the total inductance of a circuit with three inductors, 10 H, 3.5 H, and 6 H, connected in parallel? L/R TIME CONSTANTS A time constant is the time required for current through a conductor to increase to 63.2% or decrease to 36.8% of the maximum current. An RL circuit is shown in Figure LlR is the symbol used for the time constant of an RL circuit. This can be expressed as: L t = R ries (separated to prevent their magnetic fields from interacting) is equal to the sum of the individual inductances. I,. = L1 + L2 + L Ln If two or more inductors are connected in parallel (with no interaction of their magnetic fields) the total inductance is found by using the formula: where: t = time in seconds L = inductance in henries R = resistance in ohms Figure charts the growth and decay (or increase and decrease) of a magnetic field, in terms of time constants. It takes five time constants to fully transfer all the energy into the magnetic field, or to build up the maximum magnetic field. It takes five fulltime constants to completely collapse the magnetic field QUESTIONS 1. What are inductors? 2. Draw the symbols used to represent fixed and variable inductors. 3. What is another name for a laminated iron core inductor? 4. What are the formulas for determining total inductance in: a. Series circuits? b. Parallel circuits? FIGURE 109 Circuit used to determine UR time constant. GROWTH DECAY
5 114 SECTION I DC CIRCUITS FIGURE Time constants required to build up or collapse the magnetic field in an inductor. I 100 z w a: 80 o ::2! ~ 60 X «::2! 40 u... o ן m 20 o a: w ~... IGROWTH ~~I... / ~ \9.301< 98.2% 95% / 86.5% \ J " 63.2% \ 1\:% I i "~ CL o 1 2 TIMECONSTANTS I DECAY j ~1 5.0% 1.8% ~ % 103 QUESTIONS 1. What is a time constant for an inductor? 2. How is a time constant determined? 3. How many time constants are required to fully build up a magnetic field for an inductor? 4. How many time constants are required to fully collapse a magnetic field for an inductor? 5. How long does it take to fully build up a magnetic field for a O.Ihenry inductor in series with a IOO,OOOohmresistor? SUMMARY Inductance is the ability to store energy in a magnetic field. The unit for measuring inductance is the henry (H). The letter L represents inductance. Inductors are devices designed to have specific inductances. The symbol for fixed inductance is: ~~~ The symbol for a variable inductor is: Types of inductors include: air core, ferrite or powdered iron core, toroid core, shielded, and laminated iron core. The total inductance for inductors connected in series is calculated by the formula: LT = L J + L2 + L Ln The total inductance for inductors connected in parallel is: 1 1 III = L J L2 L3 r., A time constant is the time required for current to increase to 63.2% or decrease to 36.8% of the maximum current.
6 CHAPTER 10 INDUCTANCE A time constant can be determined by the formula: L t = R It takes five time constants to fully build up or collapse the magnetic field of an inductor. CHAPTER 10 SELFTESr \ ".' 1. How can the magnetic field be increased for a particular inductance? 2. What is the total inductance for the circuit shown? 3. A 500mH inductor and a 10kilohm resistor are connected in series to a 2Svolt source. What will be the voltage across the inductor 100 microseconds after energizing the circuit?.' c. ~= 800 /1H L4 = 125 /1H
Inductors are electronic components that oppose a change in current. Air Core Inductor Symbol
BASIC ELECTRICAL OBJECTIVES Discuss the construction of a Inductor Describe the way react differently in AC and DC circuits Define the calculations for connecting in Series and parallel INTRODUCTION are
More informationChapter 11. Inductors. Objectives
Chapter 11 Inductors Objectives Describe the basic structure and characteristics of an inductor Discuss various types of inductors Analyze series inductors Analyze parallel inductors Analyze inductive
More informationInductors. AC Theory. Module 3
Module 3 AC Theory What you ll learn in Module 3. Section 3.1 Electromagnetic Induction. Magnetic Fields around Conductors. The Solenoid. Section 3.2 Inductance & Back e.m.f. The Unit of Inductance. Factors
More informationChapter 11. Inductors ISU EE. C.Y. Lee
Chapter 11 Inductors Objectives Describe the basic structure and characteristics of an inductor Discuss various types of inductors Analyze series inductors Analyze parallel inductors Analyze inductive
More informationInductors & Inductance. Electronic Components
Electronic Components Induction In 1824, Oersted discovered that current passing though a coil created a magnetic field capable of shifting a compass needle. Seven years later, Faraday and Henry discovered
More informationInduction. d. is biggest when the motor turns fastest.
Induction 1. A uniform 4.5T magnetic field passes perpendicularly through the plane of a wire loop 0.10 m 2 in area. What flux passes through the loop? a. 5.0 T m 2 c. 0.25 T m 2 b. 0.45 T m 2 d. 0.135
More informationPhysics 1214 Chapter 21: Electromagnetic Induction 02/15
Physics 1214 Chapter 21: Electromagnetic Induction 02/15 1 Induction Experiments emf or electromotive force: (from Chapter 19) the influence that moves charge from lower to higher potential. induced current:
More informationIntroduction to Electricity & Magnetism. Dr Lisa JardineWright Cavendish Laboratory
Introduction to Electricity & Magnetism Dr Lisa JardineWright Cavendish Laboratory Examples of uses of electricity Christmas lights Cars Electronic devices Human body Electricity? Electricity is the presence
More informationApril 1. Physics 272. Spring 2014 http://www.phys.hawaii.edu/~philipvd/pvd_14_spring_272_uhm.html. Prof. Philip von Doetinchem philipvd@hawaii.
Physics 272 April 1 Spring 2014 http://www.phys.hawaii.edu/~philipvd/pvd_14_spring_272_uhm.html Prof. Philip von Doetinchem philipvd@hawaii.edu Phys272  Spring 14  von Doetinchem  164 Summary Gauss's
More informationBasic Electrical Theory
Basic Electrical Theory Impedance PJM State & Member Training Dept. PJM 2014 10/24/2013 Objectives Identify the components of Impedance in AC Circuits Calculate the total Impedance in AC Circuits Identify
More informationInduced voltages and Inductance Faraday s Law
Induced voltages and Inductance Faraday s Law concept #1, 4, 5, 8, 13 Problem # 1, 3, 4, 5, 6, 9, 10, 13, 15, 24, 23, 25, 31, 32a, 34, 37, 41, 43, 51, 61 Last chapter we saw that a current produces a magnetic
More informationAC Generators. Basic Generator
AC Generators Basic Generator A basic generator consists of a magnetic field, an armature, slip rings, brushes and a resistive load. The magnetic field is usually an electromagnet. An armature is any number
More information* Selfinductance * Mutual inductance * Transformers. PPT No. 32
* Selfinductance * Mutual inductance * Transformers PPT No. 32 Inductance According to Faraday s Electromagnetic Induction law, induction of an electromotive force occurs in a circuit by varying the magnetic
More informationSlide 1 / 26. Inductance. 2011 by Bryan Pflueger
Slide 1 / 26 Inductance 2011 by Bryan Pflueger Slide 2 / 26 Mutual Inductance If two coils of wire are placed near each other and have a current passing through them, they will each induce an emf on one
More informationCh.20 Induced voltages and Inductance Faraday s Law
Ch.20 Induced voltages and Inductance Faraday s Law Last chapter we saw that a current produces a magnetic field. In 1831 experiments by Michael Faraday and Joseph Henry showed that a changing magnetic
More informationCircuits with inductors and alternating currents. Chapter 20 #45, 46, 47, 49
Circuits with inductors and alternating currents Chapter 20 #45, 46, 47, 49 RL circuits Ch. 20 (last section) Symbol for inductor looks like a spring. An inductor is a circuit element that has a large
More informationObjectives. Capacitors 262 CHAPTER 5 ENERGY
Objectives Describe a capacitor. Explain how a capacitor stores energy. Define capacitance. Calculate the electrical energy stored in a capacitor. Describe an inductor. Explain how an inductor stores energy.
More informationInduction and Inductance
Induction and Inductance How we generate E by B, and the passive component inductor in a circuit. 1. A review of emf and the magnetic flux. 2. Faraday s Law of Induction 3. Lentz Law 4. Inductance and
More informationLast time : energy storage elements capacitor.
Last time : energy storage elements capacitor. Charge on plates Energy stored in the form of electric field Passive sign convention Vlt Voltage drop across real capacitor can not change abruptly because
More informationEDEXCEL NATIONAL CERTIFICATE/DIPLOMA UNIT 5  ELECTRICAL AND ELECTRONIC PRINCIPLES NQF LEVEL 3. OUTCOME 3  MAGNETISM and INDUCTION
EDEXCEL NATIONAL CERTIFICATE/DIPLOMA UNIT 5  ELECTRICAL AND ELECTRONIC PRINCIPLES NQF LEVEL 3 OUTCOME 3  MAGNETISM and INDUCTION 3 Understand the principles and properties of magnetism Magnetic field:
More informationEðlisfræði 2, vor 2007
[ Assignment View ] [ Print ] Eðlisfræði 2, vor 2007 30. Inductance Assignment is due at 2:00am on Wednesday, March 14, 2007 Credit for problems submitted late will decrease to 0% after the deadline has
More informationTRANSFORMERS INTRODUCTION
Tyco Electronics Corporation Crompton Instruments 1610 Cobb International Parkway, Unit #4 Kennesaw, GA 30152 Tel. 7704258903 Fax. 7704237194 TRANSFORMERS INTRODUCTION A transformer is a device that
More informationDiodes have an arrow showing the direction of the flow.
The Big Idea Modern circuitry depends on much more than just resistors and capacitors. The circuits in your computer, cell phone, Ipod depend on circuit elements called diodes, inductors, transistors,
More informationChapter 21 Electromagnetic Induction and Faraday s Law
Lecture PowerPoint Chapter 21 Physics: Principles with Applications, 6 th edition Giancoli Chapter 21 Electromagnetic Induction and Faraday s Law 2005 Pearson Prentice Hall This work is protected by United
More informationEnergy in Electrical Systems. Overview
Energy in Electrical Systems Overview How can Potential Energy be stored in electrical systems? Battery Stored as chemical energy then transformed to electrical energy on usage Water behind a dam Water
More informationALTERNATING CURRENTS
ALTERNATING CURRENTS VERY SHORT ANSWER QUESTIONS Q1. What is the SI unit of? Q2. What is the average value of alternating emf over one cycle? Q3. Does capacitor allow ac to pass through it? Q4. What
More informationElectrical Circuits (2)
Electrical Circuits (2) Lecture 5 Magnetically Coupled Circuits Dr.Eng. Basem ElHalawany Magnetically Coupled Circuits The circuits we have considered so far may be regarded as conductively coupled, because
More informationNZQA registered unit standard 20431 version 2 Page 1 of 7. Demonstrate and apply fundamental knowledge of a.c. principles for electronics technicians
NZQA registered unit standard 0431 version Page 1 of 7 Title Demonstrate and apply fundamental knowledge of a.c. principles for electronics technicians Level 3 Credits 7 Purpose This unit standard covers
More informationLine Reactors and AC Drives
Line Reactors and AC Drives Rockwell Automation Mequon Wisconsin Quite often, line and load reactors are installed on AC drives without a solid understanding of why or what the positive and negative consequences
More informationTransformers. What is a transformer?
Transformers What is a transformer? A transformer is a device that transfers electrical energy from one circuit to another through inductively coupled conductors the transformer's coils. A physical and
More informationChapter 20. Magnetic Induction Changing Magnetic Fields yield Changing Electric Fields
Chapter 20 Magnetic Induction Changing Magnetic Fields yield Changing Electric Fields Introduction The motion of a magnet can induce current in practical ways. If a credit card has a magnet strip on its
More informationSCS 139 II.3 Induction and Inductance
SCS 139 II.3 Induction and Inductance Dr. Prapun Suksompong prapun@siit.tu.ac.th L d dt di L dt B 1 Office Hours: Library (Rangsit) Mon 16:2016:50 BKD 36017 Wed 9:2011:20 Review + New Fact Review Force
More informationInductor and Magnetic Product Terminology
INTRODUCTION IFC LPT ILB IHSM IM IMC LPE TJ LPC IRF IHB The scope of this application note is to define the terminology associated with inductors and their applications. Some of these terms are listed
More informationObjectives for the standardized exam
III. ELECTRICITY AND MAGNETISM A. Electrostatics 1. Charge and Coulomb s Law a) Students should understand the concept of electric charge, so they can: (1) Describe the types of charge and the attraction
More informationAP Physics Electricity and Magnetism #4 Electrical Circuits, Kirchoff s Rules
Name Period AP Physics Electricity and Magnetism #4 Electrical Circuits, Kirchoff s Rules Dr. Campbell 1. Four 240 Ω light bulbs are connected in series. What is the total resistance of the circuit? What
More informationEdmund Li. Where is defined as the mutual inductance between and and has the SI units of Henries (H).
INDUCTANCE MUTUAL INDUCTANCE If we consider two neighbouring closed loops and with bounding surfaces respectively then a current through will create a magnetic field which will link with as the flux passes
More informationSeries,"Parallel," and"series." Parallel"Circuits"
chapter 25 Series,"Parallel," and"series." Parallel"Circuits" FIGURE 25.1 A series circuit with three bulbs. All current flows through all resistances (bulbs). The total resistance of the circuit is the
More informationAC 1 Fundamentals. Ê>{X4èRÆ3lË. Student Workbook Edition 4
AC 1 Fundamentals Student Workbook 9156200 Edition 4 Ê>{X4èRÆ3lË 3091562000503 FOURTH EDITION Second Printing, March 2005 Copyright March, 2003 LabVolt Systems, Inc. All rights reserved. No part of
More informationExtra Questions  1. 1. What current will flow in a 20Ω resistor when it is connected to a 50V supply? a) 0.4A b) 1.6A c) 2.5A
Extra Questions  1 1. What current will flow in a 20Ω resistor when it is connected to a 50V supply? a) 0.4A b) 1.6A c) 2.5A 2. A current of 500mA flows in a resistance of 12Ω. What power is dissipated
More informationBasic AC Reactive Components IMPEDANCE
Basic AC Reactive Components Whenever inductive and capacitive components are used in an AC circuit, the calculation of their effects on the flow of current is important. EO 1.9 EO 1.10 EO 1.11 EO 1.12
More informationName: Lab Partner: Section: The purpose of this lab is to study induction. Faraday s law of induction and Lenz s law will be explored.
Chapter 8 Induction  Faraday s Law Name: Lab Partner: Section: 8.1 Purpose The purpose of this lab is to study induction. Faraday s law of induction and Lenz s law will be explored. 8.2 Introduction It
More informationWhen we do not get specific resistor values we have to either use variable resistors such as
RESISTOR COMBINATIONS When we do not get specific resistor values we have to either use variable resistors such as potentiometers or presets to obtain such precise values. Pots are too expensive to use
More informationFaraday s Law of Induction
Faraday s Law of Induction Potential drop along the closed contour is minus the rate of change of magnetic flu. We can change the magnetic flu in several ways including changing the magnitude of the magnetic
More informationChapt ha e pt r e r 12 RL Circuits
Chapter 12 RL Circuits Sinusoidal Response of RL Circuits The inductor voltage leads the source voltage Inductance causes a phase shift between voltage and current that depends on the relative values of
More informationInductance. Motors. Generators
Inductance Motors Generators Selfinductance Selfinductance occurs when the changing flux through a circuit arises from the circuit itself. As the current increases, the magnetic flux through a loop due
More informationVoltage, Current, Resistance, Capacitance and Inductance
Voltage, Current, Resistance, Capacitance and Inductance Really basic electrical engineering. 1 Electricity and conductors Electricity is the movement of electrons. Electrons move easily through a conductor
More informationSaturday Xtra XSheet: 19. Electric circuits
Saturday Xtra XSheet: 9 Key Concepts Electric circuits This lesson focuses on the following: Potential Difference Current The resistance of a conductor Ohm s Law and circuit calculations Terminology
More informationEE301 Lesson 14 Reading: 10.110.4, 10.1110.12, 11.111.4 and 11.1111.13
CAPACITORS AND INDUCTORS Learning Objectives EE301 Lesson 14 a. Define capacitance and state its symbol and unit of measurement. b. Predict the capacitance of a parallel plate capacitor. c. Analyze how
More informationReading Quiz. 1. Currents circulate in a piece of metal that is pulled through a magnetic field. What are these currents called?
Reading Quiz 1. Currents circulate in a piece of metal that is pulled through a magnetic field. What are these currents called? A. Induced currents B. Displacement currents C. Faraday s currents D. Eddy
More informationApplication Note. So You Need to Measure Some Inductors?
So You Need to Measure Some nductors? Take a look at the 1910 nductance Analyzer. Although specifically designed for production testing of inductors and coils, in addition to measuring inductance (L),
More informationAP Physics C Chapter 23 Notes Yockers Faraday s Law, Inductance, and Maxwell s Equations
AP Physics C Chapter 3 Notes Yockers Faraday s aw, Inductance, and Maxwell s Equations Faraday s aw of Induction  induced current a metal wire moved in a uniform magnetic field  the charges (electrons)
More informationResistors and Ohms Law
Resistors and Ohms Law A wire is an ideal conductor with no resistance (at least for our discussion). n contrast, a resistor is a component that purposefully impedes or opposes the flow of electrons. As
More informationINTRODUCTION SELF INDUCTANCE. Introduction. Self inductance. Mutual inductance. Transformer. RLC circuits. AC circuits
Chapter 13 INDUCTANCE Introduction Self inductance Mutual inductance Transformer RLC circuits AC circuits Magnetic energy Summary INTRODUCTION Faraday s important contribution was his discovery that achangingmagneticflux
More informationChapter 20.1 Induced EMF and magnetic flux
Chapter 20.1 nduced EMF and magnetic flux Electric current gives rise to magnetic fields Can a magnetic field give rise to a current? Michael Faraday 17911867 The answer is yes as discovered by Michael
More informationLecture 10 Induction and Inductance Ch. 30
Lecture 10 Induction and Inductance Ch. 30 Cartoon  Faraday Induction Opening Demo  Thrust bar magnet through coil and measure the current Warmup problem Topics Faraday s Law Lenz s Law Motional Emf
More informationRUPHYS ( MPCIZEWSKI15079 ) My Courses Course Settings University Physics with Modern Physics, 13e Young/Freedman
Signed in as Jolie Cizewski, Instructor Help Sign Out RUPHYS2272014 ( MPCIZEWSKI15079 ) My Courses Course Settings University Physics with Modern Physics, 13e Young/Freedman Course Home Assignments Roster
More informationInductors. Resources and methods for learning about these subjects (list a few here, in preparation for your research):
Inductors This worksheet and all related files are licensed under the Creative Commons Attribution License, version 1.0. To view a copy of this license, visit http://creativecommons.org/licenses/by/1.0/,
More informationFall 12 PHY 122 Homework Solutions #10
Fall 12 PHY 122 Homework Solutions #10 HW10: Ch.30 Q5, 8, 15,17, 19 P 1, 3, 9, 18, 34, 36, 42, 51, 66 Chapter 30 Question 5 If you are given a fixed length of wire, how would you shape it to obtain the
More informationAircraft Electrical System
Chapter 9 Aircraft Electrical System Introduction The satisfactory performance of any modern aircraft depends to a very great degree on the continuing reliability of electrical systems and subsystems.
More informationElectric Circuits. Concepts and Principles. Electric Circuits as Applied Physics. The Resistor
. Electric ircuits oncepts and Principles Electric ircuits as Applied Physics Electric circuits are one of the most practical applications of our understanding of electric and magnetic fields. In general,
More informationNavy Electricity and Electronics Training Series
NONRESIDENT TRAINING COURSE SEPTEMBER 1998 Navy Electricity and Electronics Training Series Module 2 Introduction to Alternating Current and Transformers NAVEDTRA 14174 DISTRIBUTION STATEMENT A: Approved
More informationPS6.2 Explain the factors that determine potential and kinetic energy and the transformation of one to the other.
PS6.1 Explain how the law of conservation of energy applies to the transformation of various forms of energy (including mechanical energy, electrical energy, chemical energy, light energy, sound energy,
More informationEinstein Classes, Unit No. 102, 103, Vardhman Ring Road Plaza, Vikas Puri Extn., Outer Ring Road, New Delhi , Ph. : ,
1 EMI & AC 1. Derive an expression for the impendance of a coil in AC ciruit. A current of 1.1 A flows through a coil when connected to a 110 V DC. When 110 V AC of 50 Hz is applied to the same coil, only
More informationChapter 14. Transformers ISU EE. C.Y. Lee
Chapter 14 Transformers Objectives Explain mutual inductance Describe how a transformer is constructed and how it works Explain how a stepup and down transformer works Discuss the effect of a resistive
More informationW03 Analysis of DC Circuits. Yrd. Doç. Dr. Aytaç Gören
W03 Analysis of DC Circuits Yrd. Doç. Dr. Aytaç Gören ELK 2018  Contents W01 Basic Concepts in Electronics W02 AC to DC Conversion W03 Analysis of DC Circuits (self and condenser) W04 Transistors and
More informationLab 5: Basic DirectCurrent Circuits Edited 11/20/14 by Joe Skitka, Stephen Albright, WL, JCH & DGH
Lab 5: Basic DirectCurrent Circuits Edited 11/20/14 by Joe Skitka, Stephen Albright, WL, JCH & DGH Objective This set of miniexperiments aims to verify rules governing the addition of resistors and capacitors
More information1. Title Electrical fundamentals II (Mechanics Repair and Maintenance)
1. Title Electrical fundamentals II (Mechanics Repair and Maintenance) 2. Code EMAMBG429A 3. Range The knowledge is needed for a wide range of aircraft repair and maintenance works,e.g. applicable to aircrafts,
More informationRESISTANCE, REACTANCE AND IMPEDANCE A Primer. Douglas Brooks, PhD UltraCAD Design, Inc. PART 2, REACTANCE
RESISTANCE, REACTANCE AND IMPEDANCE A Primer Douglas Brooks, PhD UltraCAD Design, Inc. PART 2, REACTANCE This is part 2 of a 3part series on resistance, reactance and impedance. Most of us are familiar
More informationChap 21. Electromagnetic Induction
Chap 21. Electromagnetic Induction Sec. 1  Magnetic field Magnetic fields are produced by electric currents: They can be macroscopic currents in wires. They can be microscopic currents ex: with electrons
More informationRevision Calcs. 1. The flux produced by a magnet is 10mWb. Determine the flux density if the area of the pole is 250 mm 2
EMA Revision Calcs Miller College Revision Calcs Revision Calcs 1. The flux produced by a magnet is 10mWb. Determine the flux density if the area of the pole is 250 mm 2 2. For the magnet in the previous
More information12. The current in an inductor is changing at the rate of 100 A/s, and the inductor emf is 40 V. What is its selfinductance?
12. The current in an inductor is changing at the rate of 100 A/s, and the inductor emf is 40 V. What is its selfinductance? From Equation 325, L = E=(dI =dt) = 40 V=(100 A/s) = 0.4 H. 15. A cardboard
More informationQuestions. Question 1
Question 1 Questions Explain why transformers are used extensively in longdistance power distribution systems. What advantage do they lend to a power system? file 02213 Question 2 Are the transformers
More information2. A conductor of length 2m moves at 4m/s at 30 to a uniform magnetic field of 0.1T. Which one of the following gives the e.m.f. generated?
Extra Questions  2 1. A straight length of wire moves through a uniform magnetic field. The e.m.f. produced across the ends of the wire will be maximum if it moves: a) along the lines of magnetic flux
More informationThe W5JCK Guide to the Mathematic Equations Required for the Amateur Extra Class Exam
The W5JCK Guide to the Mathematic Equations Required for the Amateur Extra Class Exam This document contains every question from the Extra Class (Element 4) Question Pool* that requires one or more mathematical
More informationEE 1202 Experiment #4 Capacitors, Inductors, and Transient Circuits
EE 1202 Experiment #4 Capacitors, Inductors, and Transient Circuits 1. Introduction and Goal: Exploring transient behavior due to inductors and capacitors in DC circuits; gaining experience with lab instruments.
More informationBASIC ELECTRONICS AC CIRCUIT ANALYSIS. December 2011
AM 5202 BASIC ELECTRONICS AC CIRCUIT ANALYSIS December 2011 DISTRIBUTION RESTRICTION: Approved for Pubic Release. Distribution is unlimited. DEPARTMENT OF THE ARMY MILITARY AUXILIARY RADIO SYSTEM FORT
More informationChapter 34 Faraday s Law & Electromagnetic Induction
Chapter 34 Faraday s Law & Electromagnetic Induction Faraday s Discovery (~ 1831) Faraday found that a changing magnetic field creates a current in a wire. This is an informal statement of Faraday s law.
More informationDirection of Induced Current
Direction of Induced Current Bar magnet moves through coil Current induced in coil A S N v Reverse pole Induced current changes sign B N S v v Coil moves past fixed bar magnet Current induced in coil as
More informationCoil Testing in a Manufacturing Environment
Coil Testing in a Manufacturing Environment by Anthony Pretto, International ElectroMagnetics, Inc. Quality control is an integral part of any manufacturing process. As a part of that process, it is important
More informationMAGNETISM MAGNETISM. Principles of Imaging Science II (120)
Principles of Imaging Science II (120) Magnetism & Electromagnetism MAGNETISM Magnetism is a property in nature that is present when charged particles are in motion. Any charged particle in motion creates
More informationFirst Year (Electrical & Electronics Engineering)
Z PRACTICAL WORK BOOK For The Course EE113 Basic Electrical Engineering For First Year (Electrical & Electronics Engineering) Name of Student: Class: Batch : Discipline: Class Roll No.: Examination Seat
More information1) 10. V 2) 20. V 3) 110 V 4) 220 V
1. The diagram below represents an electric circuit consisting of a 12volt battery, a 3.0ohm resistor, R 1, and a variable resistor, R 2. 3. What is the total resistance of the circuit 1) 6.6 Ω 2) 10
More informationFaraday s Law and Inductance
Historical Overview Faraday s Law and Inductance So far studied electric fields due to stationary charges and magentic fields due to moving charges. Now study electric field due to a changing magnetic
More informationWOUND COMPONENTS. Measurement needs, problems and solutions David Sheath Application Engineer
WOUND COMPONENTS Measurement needs, problems and solutions David Sheath Application Engineer Wound components appear to be simple devices  easy to design, manufacture and test. In reality they are complex
More informationInductance. Resources and methods for learning about these subjects (list a few here, in preparation for your research):
Inductance This worksheet and all related files are licensed under the Creative Commons Attribution License, version 1.0. To view a copy of this license, visit http://creativecommons.org/licenses/by/1.0/,
More informationELECTROMAGNETIC INDUCTION (Y&F Chapters 30, 31; Ohanian Chapter 32) The Electric and magnetic fields are interrelated
EMF Handout 9: Electromagnetic Induction 1 ELECTROMAGNETIC INDUCTION (Y&F Chapters 30, 31; Ohanian Chapter 32) This handout covers: Motional emf and the electric generator Electromagnetic Induction and
More informationCh. 20 Electric Circuits
Ch. 0 Electric Circuits 0. Electromotive Force Every electronic device depends on circuits. Electrical energy is transferred from a power source, such as a battery, to a device, say a light bulb. Conducting
More informationElectromagnetic Induction
Electromagnetic Induction PHY232 Remco Zegers zegers@nscl.msu.edu Room W109 cyclotron building http://www.nscl.msu.edu/~zegers/phy232.html previously: electric currents generate magnetic field. If a current
More informationLevel 2 Physics: Demonstrate understanding of electricity and electromagnetism
Level 2 Physics: Demonstrate understanding of electricity and electromagnetism Static Electricity: Uniform electric field, electric field strength, force on a charge in an electric field, electric potential
More informationExperiment IV: Magnetic Fields and Inductance
Experiment IV: Magnetic Fields and Inductance I. References Tipler and Mosca, Physics for Scientists and Engineers, 5th Ed., Chapter 7 Purcell, Electricity and Magnetism, Chapter 6 II. Equipment Digital
More informationTransformer Calculations
Transformer Calculations Transformers Transformers are one of the most basic yet practical devices used today. No matter where you are there is always a transformer nearby. They are used throughout alternatingcurrent
More informationphysics 112N electromagnetic induction
physics 112N electromagnetic induction experimental basis of induction! seems we can induce a current in a loop with a changing magnetic field physics 112N 2 magnetic flux! useful to define a quantity
More informationInductive and Capacitive Reactance
Inductive and Capacitive Reactance Course No: E04005 Credit: 4 PDH A. Bhatia Continuing Education and Development, Inc. 9 Greyridge Farm Court Stony Point, NY 10980 P: (877) 3225800 F: (877) 3224774
More informationChapter 30 Inductance
Chapter 30 Inductance In this chapter we investigate the properties of an inductor in a circuit. There are two kinds of inductance mutual inductance and selfinductance. An inductor is formed by taken
More informationUETTDRIS32A Solve electrical problems in remote community network apparatus
UETTDRIS32A Solve electrical problems in remote community network apparatus Release: 1 UETTDRIS32A Solve electrical problems in remote community network apparatus Modification History Not applicable. Unit
More informationNZQA registered unit standard version 2 Page 1 of 7. Demonstrate and apply fundamental knowledge of d.c. principles for electronics technicians
Page 1 of 7 Title Demonstrate and apply fundamental knowledge of d.c. principles for electronics technicians Level 3 Credits 7 Purpose This unit standard covers an introduction to direct current principles
More informationTHE TRANSFORMER. REFERENCES: PASCO Transformer Notes Physics for Scientists and Engineers, Tipler, 4 th Ed., Vol. 2 INTRODUCTION.
THE TRANSFORMER LAB ELEC 7 REFERENCES: PASCO Transformer Notes Physics for Scientists and Engineers, Tipler, 4 th Ed., Vol. 2 NTRODUCTON Nearly all of today s electrical energy is produced as alternating
More informationExperiment 1 The DC Machine
Experiment 1 The DC Machine ECEN 4517 R. W. Erickson and D. Maksimovic The purpose of this experiment is to become familiar with operating principles, equivalent circuit models, and basic characteristics
More informationChapter 12. RL Circuits. Objectives
Chapter 12 RL Circuits Objectives Describe the relationship between current and voltage in an RL circuit Determine impedance and phase angle in a series RL circuit Analyze a series RL circuit Determine
More informationElectrical Fundamentals  Reactance and Impedance
PDHonline Course E239 (4 PDH) Electrical Fundamentals  Reactance and Impedance Instructor: A. Bhatia, B.E. 2012 PDH Online PDH Center 5272 Meadow Estates Drive Fairfax, VA 220306658 Phone & Fax: 7039880088
More information