Chapter 31. Current and Resistance. What quantity is represented by the symbol J?


 Cordelia Johnston
 3 years ago
 Views:
Transcription
1 Chapter 31. Current and Resistance Lights, sound systes, icrowave ovens, and coputers are all connected by wires to a battery or an electrical outlet. How and why does electric current flow through a wire? Chapter Goal: To learn how and why charge oves through a conductor as what we call a current. Chapter 31. Current and Resistance Topics: The Electron Current Creating a Current Current and Current Density Conductivity and Resistivity Resistance and Oh s Law 1 2 What quantity is represented by the sybol J? Chapter 31. Reading Quizzes A. Resistivity B. Conductivity C. Current density D. Coplex ipedance E. Johnston s constant 3 4
2 What quantity is represented by the sybol J? The electron drift speed in a typical currentcarrying wire is A. Resistivity B. Conductivity C. Current density D. Coplex ipedance E. Johnston s constant A. extreely slow ( 10 4 /s). B. oderate ( 1 /s). C. very fast ( 10 4 /s). D. Could be any of A, B, or C. E. No nuerical values were provided. 5 6 The electron drift speed in a typical currentcarrying wire is A. extreely slow ( 10 4 /s). B. oderate ( 1 /s). C. very fast ( 10 4 /s). D. Could be any of A, B, or C. E. No nuerical values were provided. All other things being equal, current will be larger in a wire that has a larger value of A. conductivity. B. resistivity. C. the coefficient of current. D. net charge. E. potential. 7 8
3 All other things being equal, current will be larger in a wire that has a larger value of A. conductivity. B. resistivity. C. the coefficient of current. D. net charge. E. potential. The equation I V/R is called A. Apère s law. B.Faraday s law. C. Oh s law. D. Weber s law The Electron Current The equation I V/R is called A. Apère s law. B. Farady s law. C. Oh s law. D. Weber s law. The electron current I is the nuber of electrons per second that pass through a cross section of a wire. The units of electron current are s 1. N e i t 11 12
4 The Electric Current The Electron Current i nav d N N e e nv na x nav t i t nav t d d i nav d Typical V d is about 104 /s. The drift speed v d is the net speed with which the electrons ove, not the speed at which any one electron is bouncing around The Law of Conservation of Current: the electron current is the sae at all points in a currentcarrying wire. How long does it take to discharge a capacitor? 0.2 [] /104 [/s] 2000 s? The electron current at A is exactly equal to the electron current at B
5 How long does it take to discharge a capacitor? Establishing the Electric Field in a Wire N e i t nav d t N e t nav d t s [ ] [ ] 10 [ / s] A Model of Conduction A Model of Conduction F a x v x v ix + a t v x t ix + The energy transfer is the friction that raises the teperature of the wire. 19 v v x v ix + a t v x v v d ix + ix τ + t v d τ 20
6 v d A Model of Conduction τ i nav d Current and Current Density dq r I (, in the direction of E) dt 1 Apere 1 A 1 coulob per second 1 C/s i neτae The electron current is directly proportional to the electric field strength. 21 Q en I e ei t t The direction of the current I in a etal is opposite the direction of otion of the electrons. The current direction in a wire is fro the positive terinal of a battery to the negative terinal. 22 Conservation of Current I I in out The Current Density in a Wire I ei nev d A I J current density A I JA nev d 23 24
7 Conductivity and Resistivity Conductivity and Resistivity J σe J nev d 2 e τ E ne τ ne ( ) E 2 τ ne σ conductivi ty 1 ρ resistivit y 2 σ ne τ Resistance and Oh s Law Oh s Law The resistance of a long, thin conductor of length L and crosssectional area A is The SI unit of resistance is the oh. 1 oh 1 Ω 1 V/A. The current through a conductor is deterined by the potential difference V along its length: Oh s law is liited to those aterials whose resistance R reains constant or very nearly so during use. The aterials to which Oh s law applies are called ohic. The current through an ohic aterial is directly proportional to the potential difference. Doubling the potential difference doubles the current. Metal and other conductors are ohic devices
8 Chapter 31. Suary Slides General Principles General Principles 31 32
9 General Principles Iportant Concepts Iportant Concepts Iportant Concepts 35 36
10 Applications Chapter 31. Questions These four wires are ade of the sae etal. Rank in order, fro largest to sallest, the electron currents i a to i d. These four wires are ade of the sae etal. Rank in order, fro largest to sallest, the electron currents i a to i d. A. i d > i a > i b > i c B. i b i d > i a i c C. i c > i b > i a > i d D. i c > i a i b > i d E. i b i c > i a i d A. i d > i a > i b > i c B. i b i d > i a i c C. i c > i b > i a > i d D. i c > i a i b > i d E. i b i c > i a i d 39 40
11 Why does the light in a roo coe on instantly when you flip a switch several eters away? A. Electrons travel at the speed of light through the wire. B. Because the wire between the switch and the bulb is already full of electrons, a flow of electrons fro the switch into the wire iediately causes electrons to flow fro the other end of the wire into the lightbulb. C. The switch sends a radio signal which is received by a receiver in the light which tells it to turn on. D. Optical fibers connect the switch with the light, so the signal travels fro switch to the light at the speed of light in an optical fiber. Why does the light in a roo coe on instantly when you flip a switch several eters away? A. Electrons travel at the speed of light through the wire. B. Because the wire between the switch and the bulb is already full of electrons, a flow of electrons fro the switch into the wire iediately causes electrons to flow fro the other end of the wire into the lightbulb. C. The switch sends a radio signal which is received by a receiver in the light which tells it to turn on. D. Optical fibers connect the switch with the light, so the signal travels fro switch to the light at the speed of light in an optical fiber What are the agnitude and the direction of the current in the fifth wire? What are the agnitude and the direction of the current in the fifth wire? A. 15 A into the junction B. 15 A out of the junction C. 1 A into the junction D. 1 A out of the junction E. Not enough data to deterine A. 15 A into the junction B. 15 A out of the junction C. 1 A into the junction D. 1 A out of the junction E. Not enough data to deterine 43 44
( C) CLASS 10. TEMPERATURE AND ATOMS
CLASS 10. EMPERAURE AND AOMS 10.1. INRODUCION Boyle s understanding of the pressurevolue relationship for gases occurred in the late 1600 s. he relationships between volue and teperature, and between
More information2 A bank account for electricity II: flows and taxes
PHYS 189 Lecture problems outline Feb 3, 2014 Resistors and Circuits Having introduced capacitors, we now expand our focus to another very important component of a circuit resistors. This entails more
More informationElectric circuits, Current, and resistance (Chapter 22 and 23)
Electric circuits, Current, and resistance (Chapter 22 and 23) Acknowledgements: Several Images and excerpts are taken from College Physics: A strategic approach, Pearson Education Inc Current If electric
More informationHow many laws are named after Kirchhoff?
Chapter 32. Fundamentals of Circuits Surprising as it may seem, the power of a computer is achieved simply by the controlled flow of charges through tiny wires and circuit elements. Chapter Goal: To understand
More informationObjectives. Electric Current
Objectives Define electrical current as a rate. Describe what is measured by ammeters and voltmeters. Explain how to connect an ammeter and a voltmeter in an electrical circuit. Explain why electrons travel
More informationWork, Energy, Conservation of Energy
This test covers Work, echanical energy, kinetic energy, potential energy (gravitational and elastic), Hooke s Law, Conservation of Energy, heat energy, conservative and nonconservative forces, with soe
More information2141375 Measurement and Instrumentation. Analog Electrical Devices and Measurements
2141375 Measureent and Instruentation nalog Electrical Devices and Measureents nalog Devices: Current Measureents Force on a conductor I conductor is placed in a unifor agnetic field B T, at an angle
More informationCircuits. PHY2049: Chapter 27 1
Circuits PHY2049: Chapter 27 1 What You Already Know Nature of current Current density Drift speed and current Ohm s law Conductivity and resistivity Calculating resistance from resistivity Power in electric
More informationAnswer, Key Homework 11 David McIntyre 1 1 A
nswer, Key Homework 11 avid Mcntyre 1 This printout should have 36 questions, check that it is complete. Multiplechoice questions may continue on the next column or page: find all choices before making
More informationHomework 6 Solutions PHYS 212 Dr. Amir
Homework 6 Solutions PHYS Dr. Amir Chapter 5: 9. (II) A 00W lightbulb has a resistance of about Ω when cold (0 C) and 0 Ω when on (hot). Estimate the temperature of the filament when hot assuming an average
More informationElectric Forces between Charged Plates
CP.1 Goals of this lab Electric Forces between Charged Plates Overview deterine the force between charged parallel plates easure the perittivity of the vacuu (ε 0 ) In this experient you will easure the
More informationelectrons/s
CURRNT, RSISTANC, AND DIRCTCURRNT CIRCUITS 9 Answers to MultipleChoice Problems. B 2. B 3. D 4. B, D 5. A 6. A 7. C 8. A 9. C 0. C. C 2. C 3. C 4. A 5. Solutions to Problems 9.. Set Up: A 5 C/s. An electron
More informationWhat will we learn in this chapter?
Chapter 19: Current, resistance, circuits What will we learn in this chapter? What are currents? Resistance and Ohm s law (no, there are no 3 laws). Circuits and electric power. Resistors in series and
More informationElectric current II. Except in a superconductor
Electric current Charges in motion: Count positive charges going from left to right Add negative charges going from right to left Subtract all charges moving in the opposite direction Divide by time =>
More informationHOMEWORK #9 MAGNETIC FIELD, ELECTROMAGNETIC INDUCTION, CHAPTER 27
HOEWORK #9 AGNETC FELD, ELECTROAGNETC NDUCTON, CHAPTER 7 54 A long tungstencore solenoid carries a current. (a) f the core is reoved while the current is held constant, does the agnetic field strength
More informationLesson 44: Acceleration, Velocity, and Period in SHM
Lesson 44: Acceleration, Velocity, and Period in SHM Since there is a restoring force acting on objects in SHM it akes sense that the object will accelerate. In Physics 20 you are only required to explain
More informationLecture L9  Linear Impulse and Momentum. Collisions
J. Peraire, S. Widnall 16.07 Dynaics Fall 009 Version.0 Lecture L9  Linear Ipulse and Moentu. Collisions In this lecture, we will consider the equations that result fro integrating Newton s second law,
More informationphysics 112N current, resistance and dc circuits
physics 112N current, resistance and dc circuits current! previously we considered electrostatic situations in which no Efield could exist inside a conductor! now we move to the case where an electric
More informationCOMMON SYSTEMS OF MEASUREMENTS
31 SI Units CHAPTER CONTENTS COMMON SYSTEMS OF MEASUREMENTS (1) Metric Syste (2) SI Syste SI UNIT OF LENGTH SI UNIT OF VOLUME SI UNIT OF TEMPERATURE UNITS OF MASS AND WEIGHT UNITS OF FORCE UNITS OF WORK
More informationAP Physics. Chapter 9 Review. Momentum et. al.
AP Physics Chapter 9 Review Moentu et. al. 1. A 2000kg truck traveling at a speed of 3.0 akes a 90 turn in a tie of 4.0 onds and eerges fro this turn with a speed of 4.0. What is the agnitude of the average
More informationELECTRIC SERVO MOTOR EQUATIONS AND TIME CONSTANTS
ELECIC SEO MOO EQUAIONS AND IME CONSANS George W. Younkin, P.E. Life FELLOW IEEE Industrial Controls Consulting, Div. Bulls Eye Marketing, Inc Fond du c, Wisconsin In the analysis of electric servo drive
More informationThe Virtual Spring Mass System
The Virtual Spring Mass Syste J. S. Freudenberg EECS 6 Ebedded Control Systes Huan Coputer Interaction A force feedbac syste, such as the haptic heel used in the EECS 6 lab, is capable of exhibiting a
More informationHomework. Reading: Chap. 30, Chap. 31 and Chap. 32. Suggested exercises: 31.1, 5, 6, 7, 8, 13, 14, 17, 23, 24, 25
Homework Reading: Chap. 30, Chap. 31 and Chap. 32 Suggested exercises: 31.1, 5, 6, 7, 8, 13, 14, 17, 23, 24, 25 Problems: 31.35, 31.38, 31.41, 31.42, 31.49, 31.54, 31.57, 31.63, 31.64, 31.67, 31.70, 31.73
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 informationShoe Size Data Investigation
Spring 013 Shoe Size Data Investigation Participants note shoe size rounded to the nearest whole nuber. For ales, add 1.5 and round to the nearest whole nuber, this will equalize the ale/feale size differences.
More informationPHYSICS 102 EXAM #2  MULTIPLE CHOICE Name Choose the one alternative that best completes the statement or answers the question. March 31, 2005 1) The figure below shows 3 identical lightbulbs connected
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 information1 of 8 3/30/2010 2:18 PM
1 of 8 3/30/2010 2:18 PM Chapter 32 Homework Due: 8:00am on Tuesday, March 30, 2010 Note: To understand how points are awarded, read your instructor's Grading Policy. [Return to Standard Assignment View]
More informationCURRENT ELECTRICITY  I
CURRNT LCTRCTY  1. lectric Current 2. Conventional Current 3. Drift elocity of electrons and current 4. Current Density 5. Ohm s Law 6. Resistance, Resistivity, Conductance & Conductivity 7. Temperature
More informationChapter 26. Capacitance and Dielectrics
Chapter 26 Capacitance and Dielectrics Capacitors Capacitors are devices that store electric charge Examples where capacitors are used: radio receivers filters in power supplies energystoring devices
More informationPhysics 211: Lab Oscillations. Simple Harmonic Motion.
Physics 11: Lab Oscillations. Siple Haronic Motion. Reading Assignent: Chapter 15 Introduction: As we learned in class, physical systes will undergo an oscillatory otion, when displaced fro a stable equilibriu.
More informationLecture Notes: ECS 203 Basic Electrical Engineering Semester 1/2010. Dr.Prapun Suksompong 1 June 16, 2010
Sirindhorn International Institute of Technology Thammasat University School of Information, Computer and Communication Technology Lecture Notes: ECS 203 Basic Electrical Engineering Semester 1/2010 Dr.Prapun
More informationDC Circuits: Ch 19. Resistors in Series 6/1/2016
DC Circuits: Ch 19 Voltage Starts out at highest point at + end of battery Voltage drops across lightbulbs and other sources of resistance. Voltage increases again at battery. I The following circuit uses
More informationPlane Trusses. Section 7: Flexibility Method  Trusses. A plane truss is defined as a twodimensional
lane Trusses A plane truss is defined as a twodiensional fraework of straight prisatic ebers connected at their ends by frictionless hinged joints, and subjected to loads and reactions that act only at
More informationAnswer: Same magnitude total momentum in both situations.
Page 1 of 9 CTP1. In which situation is the agnitude of the total oentu the largest? A) Situation I has larger total oentu B) Situation II C) Sae agnitude total oentu in both situations. I: v 2 (rest)
More informationA magnetic Rotor to convert vacuumenergy into mechanical energy
A agnetic Rotor to convert vacuuenergy into echanical energy Claus W. Turtur, University of Applied Sciences BraunschweigWolfenbüttel Abstract Wolfenbüttel, Mai 21 2008 In previous work it was deonstrated,
More informationCurrent and Resistance. February 11, 2014 Physics for Scientists & Engineers 2, Chapter 25 1
Current and Resistance February 11, 2014 Physics for Scientists & Engineers 2, Chapter 25 1 Helproom hours! Strosacker learning center, BPS 1248! Mo: 10am noon, 1pm 9pm! Tue: noon 6pm! We: noon 2pm! Th:
More informationNOTES ON MULTIMETERS
NOTES ON MULTMETES VOLTAGE, CUENT AND ESSTANCE MEASUNG NSTUMENTS To easure voltage (ac,dc), current (ac, dc) and resistance, two types of instruents, analog and digital eters, are utilized. The easureents
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 informationVersion 001 test 1 review tubman (IBII201516) 1
Version 001 test 1 review tuban (IBII01516) 1 This printout should have 44 questions. Multiplechoice questions ay continue on the next colun or page find all choices before answering. Crossbow Experient
More informationCurrent, Resistance and Electromotive Force. Young and Freedman Chapter 25
Current, Resistance and Electromotive Force Young and Freedman Chapter 25 Electric Current: Analogy, water flowing in a pipe H 2 0 gallons/minute Flow Rate is the NET amount of water passing through a
More informationCh 18 Direct Current Circuits. concept #2, 5, 10, 12, 13, 23 Problems #1, 5, 6, 11, 17, 25, 31, 32, 33, 35, 36, 37
Ch 18 Direct Current Circuits concept #2, 5, 10, 12, 13, 23 Problems #1, 5, 6, 11, 17, 25, 31, 32, 33, 35, 36, 37 currents are maintained by a source of emf (battery, generator) Sources of emf act as charge
More informationHomework 5 chapter 28: 2, 7, 31, 43
http://iml.umkc.edu/physics/wrobel/phy5/homework.htm Homework 5 chapter 8:, 7, 3, 43 Problem 8. Two.5V batteries (with their positive terminals in the same direction) are inserted in series into the barrel
More informationPhysics 2212 GH Quiz #4 Solutions Spring 2015
Physics 1 GH Quiz #4 Solutions Spring 15 Fundamental Charge e = 1.6 1 19 C Mass of an Electron m e = 9.19 1 31 kg Coulomb constant K = 8.988 1 9 N m /C Vacuum Permittivity ϵ = 8.854 1 1 C /N m Earth s
More informationModule 10. Measuring Instruments. Version 2 EE IIT, Kharagpur
Module 10 Measuring Instruents Lesson 42 Study of DCAC Measuring Instruents Objectives To understand the basic construction of a peranent agnet oving coil (PMMC) instruent and its operation. Sketch and
More informationName: Lab Partner: Section:
Chapter 6 Capacitors and RC Circuits Name: Lab Partner: Section: 6.1 Purpose The purpose of this experiment is to investigate the physics of capacitors in circuits. The charging and discharging of a capacitor
More informationELECTRICAL CIRCUITS. Electrical Circuits
Electrical Circuits A complete path, or circuit, is needed before voltage can cause a current flow through resistances to perform work. There are several types of circuits, but all require the same basic
More informationSolution of Saint Venant's Equation to Study Flood in Rivers, through Numerical Methods.
Hydrology Days 005 Solution of Saint Venant's Equation to Study Flood in Rivers, through Nuerical Methods. Chagas, Patrícia Departent of Environental and Hydraulics Engineering, Federal University of Ceará
More informationElectric Circuits. 1 Electric Current and Electromotive Force
1 Electric Current and Electromotive Force The flow of electric charges: Electric currents power light bulbs, TV sets, computers etc. Definition of electric current: The current is the rate at which charge
More informationPhysics 9 Fall 2009 Homework 6  Solutions
. Chapter 32  Exercise 8. Physics 9 Fall 29 Homework 6  s How much power is dissipated by each resistor in the figure? First, let s figure out the current in the circuit. Since the two resistors are
More informationExperimental and Theoretical Modeling of Moving Coil Meter
Experiental and Theoretical Modeling of Moving Coil Meter Prof. R.G. Longoria Updated Suer 010 Syste: Moving Coil Meter FRONT VIEW Electrical circuit odel Mechanical odel Meter oveent REAR VIEW needle
More informationElectrostatics. Electrostatics Version 2
1. A 150watt lightbulb is brighter than a 60.watt lightbulb when both are operating at a potential difference of 110 volts. Compared to the resistance of and the current drawn by the 150watt lightbulb,
More informationTime dependent circuits  The RC circuit
Time dependent circuits  The circuit Example 1 Charging a Capacitor Up until now we have assumed that the emfs and resistances are constant in time, so that all potentials, currents and powers are constant
More informationDOING PHYSICS WITH MATLAB TRANSIENT RESPONSES IN RC CIRCUITS INTRODUCTION. Ian Cooper School of Physics, University of Sydney
DOING PHYSIS WITH MATLAB IUITS BIOPHYSIS TANSIENT ESPONSES IN IUITS Ian ooper School of Physics, University of Sydney ian.cooper@sydney.edu.au MATLAB SIPTS (download files) simpson1d.m (function: integration
More informationPart 1. Part 1. Electric Current. and Direct Current Circuits. Electric Current. Electric Current. Chapter 19. Electric Current
Electric Current Electric Current and Direct Current Circuits Chapter 9 Resistance and Ohm s Law Power in Electric Circuits Direct Current Circuits Combination Circuits Real life is mostly dynamic Part
More informationCapacitance, Resistance, DC Circuits
This test covers capacitance, electrical current, resistance, emf, electrical power, Ohm s Law, Kirchhoff s Rules, and RC Circuits, with some problems requiring a knowledge of basic calculus. Part I. Multiple
More informationAP1 Electricity. 1. A student wearing shoes stands on a tile floor. The students shoes do not fall into the tile floor due to
1. A student wearing shoes stands on a tile floor. The students shoes do not fall into the tile floor due to (A) a force of repulsion between the shoes and the floor due to macroscopic gravitational forces.
More informationCircuits. The light bulbs in the circuits below are identical. Which configuration produces more light? (a) circuit I (b) circuit II (c) both the same
Circuits The light bulbs in the circuits below are identical. Which configuration produces more light? (a) circuit I (b) circuit II (c) both the same Circuit II has ½ current of each branch of circuit
More informationChapter 13 Simple Harmonic Motion
We are to adit no ore causes of natural things than such as are both true and sufficient to explain their appearances. Isaac Newton 13.1 Introduction to Periodic Motion Periodic otion is any otion that
More informationMh1: Simple Harmonic Motion. Chapter 15. Motion of a SpringMass System. Periodic Motion. Oscillatory Motion
Mh1: Siple Haronic Motion Chapter 15 Siple block and spring Oscillatory Motion Exaple: the tides, a swing Professor Michael Burton School of Physics, UNSW Periodic Motion! Periodic otion is otion of an
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 informationA Gas Law And Absolute Zero
A Gas Law And Absolute Zero Equipent safety goggles, DataStudio, gas bulb with pressure gauge, 10 C to +110 C theroeter, 100 C to +50 C theroeter. Caution This experient deals with aterials that are very
More informationVocabulary Electrical Energy Negative charge Electric Field Conductor Insulator Voltage Current Circuit breaker Fuse. Chapter 17.
Introduction to Electricity Table of Contents Bellringer Write a definition for electric charge in your own words in your science journal. When do you experience electric charges most, in winter or in
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 informationPHYS2020: General Physics II Course Lecture Notes Section III
PHYS2020: General Physics Course Lecture Notes Section Dr. Donald G. Luttermoser East Tennessee State University Edition 4.0 Abstract These class notes are designed for use of the instructor and students
More informationThe content contained in sections 1 4, 6 9, 11 13, and 15 of chapter 20 of the textbook is included on the AP Physics B exam.
hapter 0 Electric ircuits hapter 0 ELETR RUTS PREVEW onventional current is the flow of positive charges though a closed circuit. The current through a resistance and the voltage which produces it are
More informationChapter 18 Electric Current and Circuits
Chapter 18 Electric Current and Circuits 3. When a current flows down a wire: A. electrons are moving in the direction of the current. B. electrons are moving opposite the direction of the current. C.
More informationLecture Presentation Chapter 23 Circuits
Lecture Presentation Chapter 23 Circuits Suggested Videos for Chapter 23 Prelecture Videos Analyzing Circuits Series and Parallel Circuits Capacitor Circuits Video Tutor Solutions Circuits Class Videos
More informationUniversity Physics 227N/232N Current and Ohm s Law, Resistors, Circuits, and Kirchoff Lab this Friday, Feb 28 So NO QUIZ this Friday!
University Physics 227N/232N Current and Ohm s Law, Resistors, Circuits, and Kirchoff Lab this Friday, Feb 28 So NO QUIZ this Friday! Dr. Todd Satogata (ODU/Jefferson Lab) and Fred Miller satogata@jlab.org
More informationElectrical discharge in air e.g. lightning
Static Electricity electron transfer causes static electricity results from an imbalance of charges can occur by induction, friction, and contact You need to describe the direction of motion of charges
More informationChapter 7 DirectCurrent Circuits
Chapter 7 DirectCurrent Circuits 7. Introduction...77. Electromotive Force...73 7.3 Resistors in Series and in Parallel...75 7.4 Kirchhoff s Circuit Rules...77 7.5 VoltageCurrent Measurements...79
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 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 informationPhysics 133: tutorial week 4 Ohm s law, electrical power, emf and internal resistance.
Physics 133: tutorial week 4 Ohm s law, electrical power, emf and internal resistance. 41. The heating element of a clothes drier has a resistance of 11Ïand is connected across a 240V electrical outlet.
More informationLecture L263D Rigid Body Dynamics: The Inertia Tensor
J. Peraire, S. Widnall 16.07 Dynaics Fall 008 Lecture L63D Rigid Body Dynaics: The Inertia Tensor Version.1 In this lecture, we will derive an expression for the angular oentu of a 3D rigid body. We shall
More informationA Gas Law And Absolute Zero Lab 11
HB 040605 A Gas Law And Absolute Zero Lab 11 1 A Gas Law And Absolute Zero Lab 11 Equipent safety goggles, SWS, gas bulb with pressure gauge, 10 C to +110 C theroeter, 100 C to +50 C theroeter. Caution
More informationTHREEPHASE DIODE BRIDGE RECTIFIER
Chapter THREEPHASE DIODE BRIDGE RECTIFIER The subject of this book is reduction of total haronic distortion (THD) of input currents in threephase diode bridge rectifiers. Besides the reduction of the
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 informationTheoretical Modeling of Magnetocaloric Effect in Heusler NiMnIn Alloy by Monte Carlo Study
Materials Science Foru Online: 20091203 ISSN: 16629752, Vol. 635, pp 137142 doi:10.4028/www.scientific.net/msf.635.137 2010 Trans Tech Publications, Switzerland Theoretical Modeling of Magnetocaloric
More informationPure Bending Determination of StressStrain Curves for an Aluminum Alloy
Proceedings of the World Congress on Engineering 0 Vol III WCE 0, July 68, 0, London, U.K. Pure Bending Deterination of StressStrain Curves for an Aluinu Alloy D. TorresFranco, G. UrriolagoitiaSosa,
More informationPREDICTION OF MILKLINE FILL AND TRANSITION FROM STRATIFIED TO SLUG FLOW
PREDICTION OF MILKLINE FILL AND TRANSITION FROM STRATIFIED TO SLUG FLOW ABSTRACT: by Douglas J. Reineann, Ph.D. Assistant Professor of Agricultural Engineering and Graee A. Mein, Ph.D. Visiting Professor
More informationSTUDY MATERIAL FOR CLASS 10+2  Physics CURRENT ELECTRICITY. The flow of electric charges in a particular direction constitutes electric current.
Chapter : 3 Current Electricity Current Electricity The branch of Physics which deals with the study of electric charges in motion is called current electricity. Electric current The flow of electric charges
More informationChapter 18. Direct Current Circuits
Chapter 18 Direct Current Circuits Sources of emf The source that maintains the current in a closed circuit is called a source of emf Any devices that increase the potential energy of charges circulating
More informationCurrent, Resistance and DC Circuits
E1  Current and Current Density Chapter E Current, Resistance and DC Circuits Blinn College  Physics 2426  Terry Honan Basic Definitions If Q is the charge that passes through some surface, usually
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 informationChapter 5. Principles of Unsteady  State Heat Transfer
Suppleental Material for ransport Process and Separation Process Principles hapter 5 Principles of Unsteady  State Heat ransfer In this chapter, we will study cheical processes where heat transfer is
More informationChapter 6. Current and Resistance
6 6 60 Chapter 6 Current and Resistance 6.1 Electric Current... 62 6.1.1 Current Density... 62 6.2 Ohm s Law... 65 6.3 Summary... 68 6.4 Solved Problems... 69 6.4.1 Resistivity of a Cable... 69
More informationSTUDY GUIDE: ELECTRICITY AND MAGNETISM
319 S. Naperville Road Wheaton, IL 60187 www.questionsgalore.net Phone: (630) 5805735 EMail: info@questionsgalore.net Fax: (630) 5805765 STUDY GUIDE: ELECTRICITY AND MAGNETISM An atom is made of three
More informationSERIES AND PARALLEL CIRCUITS
SERIES AND PARALLEL CIRCUITS Circuits Provides a path for electricity to travel Similar to water pipes in your house Because of the voltage of an outlet, electrons will travel through the circuit Electrons
More informationExercises on Voltage, Capacitance and Circuits. A d = (8.85 10 12 ) π(0.05)2 = 6.95 10 11 F
Exercises on Voltage, Capacitance and Circuits Exercise 1.1 Instead of buying a capacitor, you decide to make one. Your capacitor consists of two circular metal plates, each with a radius of 5 cm. The
More informationNoteARific: Characteristics
NoteARific: Characteristics Any path along which electrons can flow is a circuit. For a continuous flow of electrons, there must be a complete circuit with no gaps. A gap is usually an electric switch
More informationChapter 19 DC Circuits
Lecture PowerPoints Chapter 19 Physics: Principles with Applications, 6 th edition Giancoli Chapter 19 DC Circuits 2005 Pearson Prentice Hall This work is protected by United States copyright laws and
More informationResistance Review Following the potential around a circuit Multiloop Circuits RC Circuits
DC Circuits esistance eview Following the potential around a circuit Multiloop Circuits C Circuits Homework for today: ead Chapters 6, 7 Chapter 6 Questions, 3, 0 Chapter 6 Problems, 7, 35, 77 Homework
More informationf. The current at location A is equal to the current at location B. e. The current at location B is greater than the current at location E.
1. Answer: The current outside the branches of a combination circuit is everywhere the same. The current inside of the branches is always less than that outside of the branches. When comparing the current
More informationElectric Currents. Electric Potential Energy 11/23/16. Topic 5.1 Electric potential difference, current and resistance
Electric Currents Topic 5.1 Electric potential difference, current and resistance Electric Potential Energy l If you want to move a charge closer to a charged sphere you have to push against the repulsive
More informationLED lighting is believed to be the biggest revolution in lighting technology since the invention of lamp by Edison.
FRIGOLED LIGHTING SYSTEMS Led Technology LED lighting is believed to be the biggest revolution in lighting technology since the invention of lap by Edison. Today, the LED bulbs have begun to replace the
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 informationAnalysis of the purchase option of computers
Analysis of the of coputers N. Ahituv and I. Borovits Faculty of Manageent, The Leon Recanati Graduate School of Business Adinistration, TelAviv University, University Capus, RaatAviv, TelAviv, Israel
More informationGeneral tolerances for Iinearand angular dimensions and geometrical=.tolerances
oa /  UDC 21 753 1 : 21 7 : 21 9 : 744 43 DEUTSCHE NORM April 1991 General tolerances for Iinearand angular diensions and geoetrical= tolerances (not to be used for new destgns) 'j' ;,, DIN 718 Allgeeintoleranzen
More informationChapter 11 Electricity
Chapter 11 Electricity Course Content Definition of Electricity Circuit Diagrams Series and Parallel Circuits Calculating total resistances Measurement of Electricity Ammeters and Voltmeters Ohm s Law
More information