Chapter 11. Inductors ISU EE. C.Y. Lee


 Daniella O’Neal’
 9 months ago
 Views:
Transcription
1 Chapter 11 Inductors
2 Objectives Describe the basic structure and characteristics of an inductor Discuss various types of inductors Analyze series inductors Analyze parallel inductors Analyze inductive dc switching circuits Analyze inductive ac circuits 2
3 The Basic Inductor When a length of wire is formed onto a coil, it becomes a basic inductor When there is current through the coil, a threedimensional electromagnetic field is created, surrounding the coil in all directions 3
4 Basics of a Inductance The unit of inductance is the henry (H), defined as the inductance when one ampere per second through the coil, induces one volt across the coil di( t ) v ( t ) = L dt In many practical applications, mh (103 H) or μh (106 H) are the more common units. 4
5 Basics of a Inductance Inductance is a measure of a coil s ability to establish an induced voltage as a result of a change in its current, and that induced voltage is in a direction to oppose that change in current An inductor stores energy in the magnetic field created by the current: 5 U = 1 LI 2 2 (J)
6 Physical Characteristics Inductance is directly proportional to the permeability of the core material Inductance is directly proportional to the crosssectional area of the core Inductance is directly proportional to the square of the number of turns of wire Inductance is inversely proportional to the length of the core material L N μ l 2 A = (H) 6
7 Physical Characteristics Example: Determine the inductance of the coil μ = H/m A = πr 2 = π( ) 2 = m 2 L = μn 2 A/l = ( )(350) 2 ( )/(0.015) = 40 mh 7
8 Winding Resistance When many turns of wire are used to construct a coil, the total resistance may be significant The inherent resistance is called the dc resistance or the winding resistance (R W ) 8
9 Winding Capacitance When two conductors are placed sidebyside, there is always some capacitance between them When many turns of wire are placed close together in a coil, there is a winding capacitance (C W ) C W becomes significant at high frequencies 9
10 Faraday s Laws Faraday s law: The amount of voltage induced in a coil is directly proportional to the rate of change of the magnetic field with respect to the coil 10
11 Lenz s Laws Example of Lenz s law: 11
12 Lenz s Laws Example of Lenz s law: 12
13 Typical Inductors 13
14 Series Inductors When inductors are connected in series, the total inductance increases L T = L 1 + L 2 + L L n 14
15 Parallel Inductors When inductors are connected in parallel, the total inductance is less than the smallest inductance 1/L T = 1/L 1 + 1/L 2 + 1/L /L n 15
16 Inductors in DC Circuits When there is constant current in an inductor, there is no induced voltage There is a voltage drop in the circuit due to the winding resistance of the coil Inductance itself appears as a short to dc V=0 + I I 16
17 Inductors in DC Circuits Illustration of the exponential buildup of current in an inductor 17
18 Inductors in DC Circuits Illustration of the exponential decrease of current in an inductor 18
19 RL Time Constant Because the inductor s basic action opposes a change in its current, it follows that current cannot change instantaneously in an inductor The rate, a certain time is required for the current to make a change from one value to another, is determined by the RL time constant (τ = L/R) i + + i 19
20 Energizing Current in an Inductor In a series RL circuit, the current will increase to approximately 63% of its full value in one timeconstant (τ) interval after the switch is closed The current reaches its final value in approximately 5τ i = ( tr / L 1 ) I F e 20
21 Deenergizing Current in an Inductor In a series RL circuit, the current will decrease to approximately 63% of its fully charged value one timeconstant (τ) interval after the switch is closed The current reaches 1% of its initial value in approximately 5τ; considered to be equal to 0 i = I i e tr / L 21
22 RL Time Constant Example: Determine the inductor current 30 μs after the switch is closed τ = L/R = 100mH/2.2kΩ = 45.5 μs I F = V s /R = 12V/2.2kΩ = 5.45 ma i L = I F (1 e Rt/L ) = (5.45)(1 e 0.66 ) = 2.63 ma 22
23 RL Time Constant Example: Determine the inductor current 2 ms after the switch(1) is opened and switch(2) is closed τ = L/R = 200mH/56Ω = 3.57 ms I i = V s /R = 5V/56Ω = 89.3 ma i L = I i (e Rt/L ) = (89.3)(e 0.56 ) = 51.0 ma 23
24 Analysis of Inductive AC Circuit The current lags the voltage by 90 in a purely inductive ac circuit v ( t ) = L di( t dt ) 24
25 Ohm s Law in Inductive AC Circuits The reactance (X L ) of a inductor is analogous to the resistance (R) of a resistor V = IZ L = I(jωL) = I(jX L ) Magnitude V = IX L V = IR 25
26 Inductive Reactance, X L The relationship between inductive reactance, inductance and frequency is: X L = 2π f L (Ω) Example: Determine the inductive reactance 1 khz X L = 2π f L = 2π( )( ) = 31.4 kω 26
27 Inductive Reactance, X L I = V X L = V 2πfL 27
28 Inductive Reactance, X L I = V X L = V 2πfL 28
29 Inductive Reactance, X L Example: Determine the rms current in below circuit X L = 2π( )( ) = 6283 Ω V rms = I rms X L I rms = V rms /X L = (5V)/(6283Ω) = 796 μa 29
30 Power in a Inductor Instantaneous power (p) is the product of v and i True power (P true ) is zero, since no net energy is lost due to conversion to heat in the inductor 30
31 Power in a Inductor The rate at which an inductor stores or returns energy is called reactive power (P r ); units: (VAR) P = P r r P r = = I rms V X I 2 rms L 2 rms V X rms L These equations are of the same form as those introduced in Chapter 3 for true power in a resistor 31
32 Quality Factor (Q) of a Coil The quality factor (Q) is the ratio of the reactive power in the inductor to the true power in the winding resistance of the coil or the resistance in series with the coil Q = (reactive power) / (true power) Q = X L /R W 32
33 Inductor Applications An inductor can be used in the filter to smooth out the ripple voltage 33
34 Summary Selfinductance is a measure of a coil s ability to establish an induced voltage as a result of a change in its current Inductance is directly proportional to the square of the number of turns, the permeability, and the cross sectional area of the core. It is inversely proportional to the length of the core An inductor opposes a change in its own current 34
35 Summary Faraday s law states that relative motion between a magnetic field and a coil induces voltage across the coil Lenz s law states that the polarity of induced voltage is such that the resulting induced current is in a direction that opposes the change in the magnetic field that produced it 35
36 Summary The permeability of a core material is an indication of the ability of the material to establish a magnetic field The time constant for a series RL circuit is the inductance divided by the resistance In an RL circuit, the voltage and current in an energizing or deenergizing inductor make a 63% change during each timeconstant interval 36
37 Summary Inductors add in series Total parallel inductance is less than that of the smallest inductor in parallel Current lags voltage by 90 in an inductor Inductive reactance (X L ) is directly proportional to frequency and inductance An inductor blocks highfrequency ac 37
Chapter 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 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 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 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 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 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 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 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 informationApril 8. Physics 272. Spring Prof. Philip von Doetinchem
Physics 272 April 8 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  218 LC in parallel
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 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 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 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 informationHomework #11 20311721 Physics 2 for Students of Mechanical Engineering
Homework #11 20311721 Physics 2 for Students of Mechanical Engineering 2. A circular coil has a 10.3 cm radius and consists of 34 closely wound turns of wire. An externally produced magnetic field of
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 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 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 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 informationPhysics 2102 Lecture 19. Physics 2102
Physics 2102 Jonathan Dowling Physics 2102 Lecture 19 Ch 30: Inductors and RL Circuits Nikolai Tesla What are we going to learn? A road map Electric charge Electric force on other electric charges Electric
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 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 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 informationDirect versus Alternating Current Things We Can Measure
Phil Sherrod W4PHS Direct versus Alternating Current Things We Can Measure Direct Current (DC) Alternating Current (AC) Voltage Voltage (peak, RMS) Current Current (peak, effective) Power True power, Apparent
More informationThe current that flows is determined by the potential difference across the conductor and the resistance of the conductor (Ohm s law): V = IR P = VI
PHYS1000 DC electric circuits 1 Electric circuits Electric current Charge can move freely in a conductor if an electric field is present; the moving charge is an electric current (SI unit is the ampere
More informationEðlisfræði 2, vor 2007
[ Assignment View ] [ Pri Eðlisfræði 2, vor 2007 31. Alternating Current Circuits Assignment is due at 2:00am on Wednesday, March 21, 2007 Credit for problems submitted late will decrease to 0% after the
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 informationChapter 27 Magnetic Induction. Copyright 2008 Pearson Education Inc., publishing as Pearson AddisonWesley
Chapter 27 Magnetic Induction Motional EMF Consider a conductor in a Bfield moving to the right. In which direction will an electron in the bar experience a magnetic force? V e  V The electrons in the
More information1) Magnetic field lines come out of the south pole of a magnet and enter at the north pole.
Exam Name 1) Magnetic field lines come out of the south pole of a magnet and enter at the north pole. 2) Which of the following statements is correct? A) Earth's north pole is magnetic north. B) The north
More informationReactance and Impedance
Reactance and Impedance Capacitance in AC Circuits Professor Andrew H. Andersen 1 Objectives Describe capacitive ac circuits Analyze inductive ac circuits Describe the relationship between current and
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 informationLab #4 Capacitors and Inductors. Capacitor and Inductor Transient Response
Capacitor and Inductor Transient Response Capacitor Theory Like resistors, capacitors are also basic circuit elements. Capacitors come in a seemingly endless variety of shapes and sizes, and they can all
More informationEDEXCEL NATIONAL CERTIFICATE/DIPLOMA UNIT 5  ELECTRICAL AND ELECTRONIC PRINCIPLES NQF LEVEL 3 OUTCOME 4  ALTERNATING CURRENT
EDEXCEL NATIONAL CERTIFICATE/DIPLOMA UNIT 5  ELECTRICAL AND ELECTRONIC PRINCIPLES NQF LEVEL 3 OUTCOME 4  ALTERNATING CURRENT 4 Understand singlephase alternating current (ac) theory Single phase AC
More informationEE 221 Circuits II. Chapter 13 Magnetically Coupled Circuits
EE Circuits II Chapter 3 Magnetically Coupled Circuits Magnetically Coupled Circuits 3. What is a transformer? 3. Mutual Inductance 3.3 Energy in a Coupled Circuit 3.4 inear Transformers 3.5 Ideal Transformers
More information45. The peak value of an alternating current in a 1500W device is 5.4 A. What is the rms voltage across?
PHYS Practice Problems hapters 8 hapter 8. 45. The peak value of an alternating current in a 5W device is 5.4 A. What is the rms voltage across? The power and current can be used to find the peak voltage,
More informationChapter 12. RL Circuits ISU EE. C.Y. Lee
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 informationAfter completing this chapter, the student should be able to:
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.
More information104 Practice Exam 23/21/02
104 Practice Exam 23/21/02 1. Two electrons are located in a region of space where the magnetic field is zero. Electron A is at rest; and electron B is moving westward with a constant velocity. A nonzero
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 informationChapter 15 10/14/2014
Chapter 15 Analyze series and parallel ac circuits to find Voltage Current Power Total impedance, admittance Apply known circuit theories Kirchhoff s current, voltage laws Voltage or current divider rule
More informationCh 21: Induction. Electromagnetic Induction. Lenz s Law 6/1/2016
Ch 21: Induction Faraday s Experiment Trying to induce a current using magnetic fields No induced current in Y loop with a DC circuit Saw a current when opening and closing the switch (changing the magnetic
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 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 informationELECTRICAL ENGINEERING Vol. I  Direct Current and Alternating Current Systems  N. Rajkumar DIRECT CURRENT AND ALTERNATING CURRENT SYSTEMS
DIRECT CURRENT AND ALTERNATING CURRENT SYSTEMS N. Rajkumar, Research Fellow, Energy Systems Group, City University Northampton Square, London EC1V 0HB, UK Keywords: Electrical energy, direct current, alternating
More informationLRC Circuits. Purpose. Principles PHYS 2211L LAB 7
Purpose This experiment is an introduction to alternating current (AC) circuits. Using the oscilloscope, we will examine the voltage response of inductors, resistors and capacitors in series circuits driven
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 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 informationBasic Electrical Theory
Basic Electrical Theory Power Principles and Phase Angle PJM State & Member Training Dept. PJM 2014 10/24/2013 Objectives At the end of this presentation the learner will be able to; Identify the characteristics
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 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 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 informationMutual inductance. Resources and methods for learning about these subjects (list a few here, in preparation for your research):
Mutual 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 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 information2. TRANSFORMERS. The main learning objectives for this chapter are listed below. Use equivalent circuits to determine voltages and currents.
. TRANSFORMERS Transformers are commonly used in applications which require the conversion of AC voltage from one voltage level to another. There are two broad categories of transformers: electronic transformers,
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 informationES250: Electrical Science. HW7: Energy Storage Elements
ES250: Electrical Science HW7: Energy Storage Elements Introduction This chapter introduces two more circuit elements, the capacitor and the inductor whose elements laws involve integration or differentiation;
More informationChapter 5 TRANSFORMERS
Chapter 5 TRANSFORMERS Objective Understand the transformer nameplate Describe the basic construction features of a transformer. Explain the relationship between voltage, current, impedance, and power
More informationε: Voltage output of Signal Generator (also called the Source voltage or Applied
Experiment #10: LR & RC Circuits Frequency Response EQUIPMENT NEEDED Science Workshop Interface Power Amplifier (2) Voltage Sensor graph paper (optional) (3) Patch Cords Decade resistor, capacitor, and
More informationBasics of Electricity
Basics of Electricity Power Flow on AC Transmission Lines PJM State & Member Training Dept. Objectives Describe the basic makeup and theory of an AC transmission line Given the formula for real power
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 informationChapter 3. Simulation of NonIdeal Components in LTSpice
Chapter 3 Simulation of NonIdeal Components in LTSpice 27 CHAPTER 3. SIMULATION OF NONIDEAL COMPONENTS IN LTSPICE 3.1 PreLab The answers to the following questions are due at the beginning of the lab.
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 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 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 informationMore Concepts. I = dq. Current is the rate of flow of charge around a circuit.
RC Circuits In this presentation, circuits with multiple batteries, resistors and capacitors will be reduced to an equivalent system with a single battery, a single resistor, and a single capacitor. Kirchoff's
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 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 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 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 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 informationRUPHYS2272015 ( RUPHY227F2015 ) My Courses Course Settings University Physics with Modern Physics, 14e Young/Freedman
Signed in as Jolie Cizewski, Instructor Help Sign Out RUPHYS2272015 ( RUPHY227F2015 ) My Courses Course Settings University Physics with Modern Physics, 14e Young/Freedman Course Home Assignments Roster
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 informationChapter 5: Analysis of TimeDomain Circuits
Chapter 5: Analysis of TimeDomain Circuits This chapter begins the analysis of circuits containing elements with the ability to store energy: capacitors and inductors. We have already defined each of
More informationElectrical Circuits I Lecture 1
Electrical Circuits I Lecture Course Contents Basic dc circuit elements, series and parallel Networks Ohm's law and Kirchoff's laws Nodal Analysis Mesh Analysis Source Transformation
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 informationCapacitors and Inductors
P517/617 ec2, P1 Capacitors and Inductors 1) Capacitance: Capacitance (C) is defined as the ratio of charge (Q) to voltage () on an object. Define capacitance by: C = Q/ = Coulombs/olt = Farad. Capacitance
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 informationLesson Plan. Inductive Reactance Electronics
Inductive Reactance Electronics Lesson Plan Performance Objective Upon completion of the lesson, students will be able to demonstrate an understanding of inductive reactance through satisfactory completion
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 informationPractice Problems  Chapter 33 Alternating Current Circuits
Multiple Choice Practice Problems  Chapter 33 Alternating Current Circuits 4. A highvoltage powerline operates at 500 000 Vrms and carries an rms current of 500 A. If the resistance of the cable is
More informationFaraday s and Lenz s Law: Induction
Lab #18 Induction page 1 Faraday s and Lenz s Law: Induction Reading: Giambatista, Richardson, and Richardson Chapter 20 (20.120.9). Summary: In order for power stations to provide electrical current
More informationMOTIONLESS ELECTRIC GENERATOR DESIGN BASED ON PERMANENT MAGNETS AND MAGNETIC AMPLIFIER
12/28/2009 MOTIONLESS ELECTRIC GENERATOR DESIGN BASED ON PERMANENT MAGNETS AND MAGNETIC AMPLIFIER FEDERALLY SPONSOR RESEARCH Not Applicable BACKGROUND  Field [0001] This application relates to motionless
More informationChapter 25 Alternating Currents
Physics Including Human Applications 554 Chapter 25 Alternating Currents GOALS When you have mastered the contents of this chapter, you will be able to achieve the following goals: Definitions Define each
More informationCritical thinfilm processes such as deposition and etching take place in a vacuum
WHITEPAPER INTRODUCING POWER SUPPLIES AND PLASMA Critical thinfilm processes such as deposition and etching take place in a vacuum SYSTEMS chamber in the presence of a plasma. A plasma is an electrically
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 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 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 informationExperiment #9: RC and LR Circuits Time Constants
Experiment #9: RC and LR Circuits Time Constants Purpose: To study the charging and discharging of capacitors in RC circuits and the growth and decay of current in LR circuits. Part 1 Charging RC Circuits
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 information13 ELECTRIC MOTORS. 13.1 Basic Relations
13 ELECTRIC MOTORS Modern underwater vehicles and surface vessels are making increased use of electrical actuators, for all range of tasks including weaponry, control surfaces, and main propulsion. This
More informationElectrical impedance  Wikipedia, the free encyclopedia
Electrical impedance From Wikipedia, the free encyclopedia Electrical impedance, or simply impedance, describes a measure of opposition to a sinusoidal alternating current (AC). Electrical impedance extends
More informationCAPACITIVE REACTANCE. We have already discussed the operation of a capacitor in a DC circuit, however let's just go over the main principles again.
Reading 13 Ron Bertrand VK2DQ http://www.radioelectronicschool.com CAPACITOR IN A DC CIRCUIT CAPACITIVE REACTANCE We have already discussed the operation of a capacitor in a DC circuit, however let's just
More informationExperiment 10. Faraday s Law of Induction. One large and two small (with handles) coils, plastic triangles, Tbase BNC connector, graph paper.
PHYSICS 176 UNIVERSITY PHYSICS LAB II Experiment 10 Faraday s Law of Induction Equipment: Supplies: Function Generator, Oscilloscope. One large and two small (with handles) coils, plastic triangles, Tbase
More informationAlternating Current. Asist. Prof. Dr. Aytaç Gören Asist. Prof. Dr. Levent Çetin
Asist. Prof. Dr. Aytaç Gören Asist. Prof. Dr. Levent Çetin 30.10.2012 Contents Alternating Voltage Phase Phasor Representation of AC Behaviors of Basic Circuit Components under AC Resistance, Reactance
More informationI d s r ˆ. However, this law can be difficult to use. If there. I total enclosed by. carrying wire using Ampere s Law B d s o
Physics 241 Lab: Solenoids http://bohr.physics.arizona.edu/~leone/ua/ua_spring_2010/phys241lab.html Name: Section 1: 1.1. A current carrying wire creates a magnetic field around the wire. This magnetic
More informationLecture 22. Inductance. Magnetic Field Energy. Outline:
Lecture 22. Inductance. Magnetic Field Energy. Outline: Selfinduction and selfinductance. Inductance of a solenoid. The energy of a magnetic field. Alternative definition of inductance. Mutual Inductance.
More informationChapter 9: Ideal Transformer. 10/9/2003 Electromechanical Dynamics 1
Chapter 9: Ideal Transformer 10/9/003 Electromechanical Dynamics 1 Introduction Transformers are one of the most useful electrical devices provides a change in voltage and current levels provides galvanic
More informationCHAPTER II ELECTRICAL MEASUREMENTS
CHAPTER II ELECTRICAL MEASUREMENTS 2.1. INTRODUCTION A variety of instruments are available for the measurement of the different electrical variables. The used principles include the electromechanical
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 information! = "d# B. ! = "d. Chapter 31: Faraday s Law! One example of Faraday s Law of Induction. Faraday s Law of Induction. Example. ! " E da = q in.
Chapter 31: Faraday s Law So far, we e looked at: Electric Fields for stationary charges E = k dq " E da = q in r 2 Magnetic fields of moing charges d = µ o I # o One example of Faraday s Law of Induction
More information