Unit Packet Table of Contents Notes 1: Magnetism Intro Notes 2: Electromagnets Notes 3: Electromagnetic Induction Guided Practice: Left Hand Rule #3
|
|
- Osborne Thomas
- 5 years ago
- Views:
Transcription
1
2 Unit Packet Table of Contents Notes 1: Magnetism Intro Notes 2: Electromagnets Notes 3: Electromagnetic Induction Guided Practice: Left Hand Rule #3
3 Name Date Notes: Magnetism intro. Regents Physics Objectives: 1. Explain the relationship between charged particles and magnetic phenomena. 2. Define the terms magnet, north pole, south pole, temporary magnet, permanent magnet. 3. Define the term domain, and describe how domains contribute to the magnetic properties of a metal such as iron. 4. State the conventions for drawing magnetic field lines, and draw simple magnetic field configurations. Magnet Terminology Magnetic force -- A force that is based on moving electric charges current flows So any time a charge moves ( ) a magnetic field is produced Natural magnets -- Does my refrigerator door have moving charges??? spin (sort of) o All atoms have electrons that o Atoms of most substances have some electrons spinning in one direction and other electrons opposite directions spinning in so resulting magnetic fields cancel out. Atoms for most elements have no net magnetic field from electron spin because they cancel each other out Atoms for some elements have many electrons with like spin which creates a tiny, atomic magnet o Atoms of elements like have many electrons with that spin in the same direction creating a little o Natural magnets possess magnetic force due to aligned elements that are magnetic. Examples: are the only three Polarity -- Describe the of magnetic fields Magnetic field lines by convention point North pole and South pole spin of electrons Fe, Co and Ni direction of action Fe, Co and Ni atomic magnets out of into
4 Thought Question: If iron, cobalt and nickel are naturally magnetic why do all samples of these elements not exhibit magnetic properties??? Magnetic domains -- Microscopic groups of atoms called have their in the same direction. Most Fe, Co or Ni do not have all aligned in the same direction so the magnetic fields of domains cancel each other out and result in a sample with domains domains randomly no alligned magnetic properties spin alligned Temporary magnet -- When placed in a magnetic field the domains will align and create a. temporary magnet Over time or with severe shock domains will Magnetic Fields & Magnetic Field lines By convention a magnetic field is described as the direction that the of a compass would point in the field. Imaginary lines that map out the magnetic field around a magnet are known as or magnetic. Field lines that are very close together indicate a magnetic field that is while field lines that are far apart indicate a magnetic field By convention magnetic field lines emerge out of the pole of a magnet and enter the south lines of flux pole of the magnet. weaker two poles become random again field lines north north pole very strong All permanent magnets have and it is impossible for a magnet to have only one pole.
5 Sketch magnetic fields for each of the following arrangements of magnets..
6 5. S N S N
7 Name Regents Physics Date Strength of Magnetic Fields Notes: Electromagnets Magnetic field lines or Lines of Flux -- Lines that show the and of a magnetic field closer The lines of flux are to one-another, the the magnetic field is. Magnetic lines of flux always form that one another. Magnetic field lines INSIDE the magnet point away from the and toward the north pole closed paths complete loops Magnetic field lines make direction stronger never cross south pole strength o Draw magnetic field lines on the following bar magnet o Choose a point in the field that you would call a strong magnetic field and label it S o Choose a point in the field that you would call a weak magnetic field and label it W S N S W
8 Electromagnetism Discovered by Hans Oersted current carrying conductor Any produces a magnetic field surrounding it Which way are electrons flowing? + - Left Hand Rule #1 (LHR1) Use your left hand with your thumb pointing in the direction of in the conductor; your fingers will curl in the direction of the magnetic field lines Strength of magnetic field is to the current in the wire and related directly related to the distance from the wire. magnetic field electron flow inversely left hand Cross section of current carrying wire with magnetic lines of flux Current = 2 amp Cross section of current carrying wire with magnetic lines of flux Current = 1 amps X X
9 Magnetic field surrounding a current carrying conductor Remember that a current flowing through a conductor has a magnetic field surrounding it. magnetic field NOTE: This is standard notation for magnetic field or current into or out of a page. x = into the page at 90 = out of the page at 90 (think of the dot as a letter o and out starts with o. Solenoid -- (AKA Electromagnet) coil of wire magnetic field current A with flowing through it. Produces a similar to one produced by a bar magnet. Factors that affect the strength of a magnetic field produced by a solenoid. larger stronger more coils stronger A solenoid may have the coils wrapped around a. core magnetized permeability stronger A solenoid with a current will produce a magnetic field. A solenoid with will produce a magnetic field o A core made of a material that can be is known as having greater o A core with greater permeability will produce a magnet. o E.g. a solenoid wrapped around a will produce a stronger magnet than one wrapped pencil around a steel nail
10
11 Name Date Notes: Induced currents Regents Physics Objectives: 1. Describe the conditions under which a current carrying conductor will experience a force in a magnetic field. 2. State the factors that influence the strength of the force. 3. Describe how a potential difference may be induced across a conductor moving in a magnetic field. Forces on a current carrier in a magnetic field S N Since the conductor has a flowing through it, it has a surrounding it. force current I (amps) conductor magnetic field This results in a acting on the by the permanent magnetic field. Magnitude of force on the conductor: magnetic field current length of conductor A larger results in a larger force A greater results in a larger force. The greater the in the field the greater the force is.
12 Magnetic forces acting on a moving charge When a charged particle moves through a magnetic field there is a that acts on the charged particle. opposite direction Positive particles experience a force in to negative particles Shows the direction of magnetic field lines (out of the page) force + e Is there a force acting on the particles? What direction? Sketch the path of the particles. Electromagnetic Induction Consider the electrons in a straight conductor moving through a magnetic field. e Is there a force acting on the electron? What direction? confined to the conductor flow of electrons in the direction of the force. work is being done Since the electrons are, the force results in a Since to move the electrons in the wire a is induced across the ends of the wire. The potential difference in the wire is related to the, wire length, potential difference strength of the mag. field velocity of the wire
13 TTQ s: Magnetism
14 TTQ s: Magnetism
15 TTQ s: Magnetism
Chapter 19. Magnetism
Chapter 19 Magnetism The figure shows the path of a negatively charged particle in a region of a uniform magnetic field. Answer the following questions about this situation (in each case, we revert back
More informationA little history. Electricity and Magnetism are related!
Intro to Magnetism A little history Until the early 19 th century, scientists thought electricity and magnetism were unrelated In 1820, Danish science professor Hans Christian Oersted was demonstrating
More informationMODULE 4.2 MAGNETISM ELECTRIC CURRENTS AND MAGNETISIM VISUAL PHYSICS ONLINE
VISUAL PHYSICS ONLINE MODULE 4.2 MAGNETISM ELECTRIC CURRENTS AND MAGNETISIM When electric charges are in motion they exert forces on each other that can t be explained by Coulomb s law. If two parallel
More informationMODULE 6 ELECTROMAGNETISM MAGNETIC FIELDS MAGNETIC FLUX VISUAL PHYSICS ONLINE
VISUAL PHYSICS ONLINE MODULE 6 ELECTROMAGNETISM MAGNETIC FIELDS MAGNETIC FLUX Magnetic field (-field ): a region of influence where magnetic materials and electric currents are subjected to a magnetic
More informationVocabulary. Magnet. a material that can create magnetic effects by itself. Electromagnet
Vocabulary Term Magnet Definition a material that can create magnetic effects by itself Electromagnet Magnets created by electric current flowing in wires. A simple electromagnet is a coil of wire wrapped
More information> What happens when the poles of two magnets are brought close together? > Two like poles repel each other. Two unlike poles attract each other.
CHAPTER OUTLINE Section 1 Magnets and Magnetic Fields Key Idea questions > What happens when the poles of two magnets are brought close together? > What causes a magnet to attract or repel another magnet?
More informationSection 3: Mapping Magnetic Fields. In this lesson you will
Section 3: Mapping Magnetic Fields In this lesson you will state the Law(s) of magnetic forces use iron filings to map the field around various configurations of bar magnets and around a horse shoe magnet
More informationTransfer of Forces Classwork
Transfer of Forces Classwork 1. Describe what a force is. 2. List at least four forces that are observed in nature. 3. How are forces transferred between two objects if they are not in contact? 4. Describe
More informationCHAPTER 20 Magnetism
CHAPTER 20 Magnetism Units Magnets and Magnetic Fields Electric Currents Produce Magnetic Fields Force on an Electric Current in a Magnetic Field; Definition of B Force on Electric Charge Moving in a Magnetic
More informationMagnets & Magnetic Fields
Magnets & Magnetic Fields Magnets Magnets have 2 poles, North and South if broken in half, each half will have both poles at the ends. Like poles repel, unlike poles attract. Hard Magnets- materials that
More informationMagnets & Electromagnets. Pg
Magnets & Electromagnets Pg. 378-385 Permanent Magnets 1. Where is the magnetic field the strongest? At the poles! **the magnetic field lines of a bar magnet are similar to the electric field lines of
More informationPHYS:1200 LECTURE 27 ELECTRICITY AND MAGNETISM (5)
1 PHYS:1200 LECTURE 27 ELECTRICITY AND MAGNETISM (5) Everyone has played with magnets and knows that they stick to some materials and not to others. This lecture explores the physical principles behind
More informationUnit 12: Magnetism. Background Reading
Unit 12: Magnetism Background Reading What causes magnetism? Have you ever wondered why certain materials can be easily magnetized while others seem to be unaffected by magnets? The properties of certain
More informationGeneral Physics II. Magnetism
General Physics II Magnetism Bar magnet... two poles: N and S Like poles repel; Unlike poles attract. Bar Magnet Magnetic Field lines [B]: (defined in a similar way as electric field lines, direction and
More informationMagnetic Fields and Forces
Nicholas J. Giordano www.cengage.com/physics/giordano Chapter 20 Magnetic Fields and Forces Marilyn Akins, PhD Broome Community College Magnetism Magnetic fields are produced by moving electric charges
More informationMagnetism & Electromagnetism
Magnetism & Electromagnetism By: Dr Rosemizi Abd Rahim Click here to watch the magnetism and electromagnetism animation video http://rmz4567.blogspot.my/2013/02/electrical-engineering.html 1 Learning Outcomes
More informationChapter 18 Study Questions Name: Class:
Chapter 18 Study Questions Name: Class: Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. The region around a magnet in which magnetic forces
More informationEB Education Revision Guide. How to work with Magnetism and Electromagnetism
EB Education Revision Guide How to work with Magnetism and Electromagnetism Magnets Magnetic fields Magnets have two poles, north and south. They produce a magnetic field, this is a region where other
More informationMagnetic Field Lines for a Loop
Magnetic Field Lines for a Loop Figure (a) shows the magnetic field lines surrounding a current loop Figure (b) shows the field lines in the iron filings Figure (c) compares the field lines to that of
More informationMagnetism. a) Ferromagnetic materials are strongly attracted to magnets. b) Paramagnetic materials are weakly attracted to magnets
Magnetism Types of Magnetic Materials Magnetic substances can be classified into three basic groups, according to their response to a magnet. Note the strength and direction of the interaction. a) Ferromagnetic
More informationReview: Magnetism and Electromagnetism
Review: Magnetism and Electromagnetism Multiple Choice: Write the letter of the term or phrase that best completes each statement. 1. Magnetism is a force of a. gravity. b. weight. c. voltage. d. attraction
More informationTopic 6.3 Magnetic Force and Field. 2 hours
Topic 6.3 Magnetic Force and Field 2 hours 1 Magnetic Fields A magnetic field is said to exist at a point if a compass needle placed there experiences a force. The appearance of a magnetic field can be
More informationChapter 19. Magnetism. 1. Magnets. 2. Earth s Magnetic Field. 3. Magnetic Force. 4. Magnetic Torque. 5. Motion of Charged Particles. 6.
Chapter 19 Magnetism 1. Magnets 2. Earth s Magnetic Field 3. Magnetic Force 4. Magnetic Torque 5. Motion of Charged Particles 6. Amperes Law 7. Parallel Conductors 8. Loops and Solenoids 9. Magnetic Domains
More informationELECTROMAGNETISM The study of the relationship between electricity and magnetism is called
ELECTROMAGNETISM The study of the relationship between electricity and magnetism is called Electromagnetism Before, 1819 it was believed that there was no connection between electricity and magnetism.
More informationLecture #4.4 Magnetic Field
Lecture #4.4 Magnetic Field During last several lectures we have been discussing electromagnetic phenomena. However, we only considered examples of electric forces and fields. We first talked about electrostatics
More informationPHYSICS - CLUTCH CH 26: MAGNETIC FIELDS AND FORCES.
!! www.clutchprep.com CONCEPT: HOW MAGNETS WORK Forever ago we found metals that would attract each other. First found in island of Magnesia named. - Most common are iron (Fe), cobalt (Co), nickel (Ni),
More informationPhysics 30 Lesson 19 Magnetic Fields. during I flow. during e flow
Physics 30 Lesson 19 Magnetic Fields Part /60 1) conductor compass I The Right Hand Rule predicts that and points to the right. before I flow during I flow 2) and points to the left. before flow during
More informationPhysics 202: Lecture 8, Pg 1
Physics 132: Lecture e 18 Elements of Physics II Agenda for Today Magnets and the Magnetic Field Magnetic fields caused by charged particles B-field from a current-carrying carrying wire Magnetic fields
More informationPHYSICS. Chapter 29 Lecture FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E RANDALL D. KNIGHT
PHYSICS FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E Chapter 29 Lecture RANDALL D. KNIGHT Chapter 29 The Magnetic Field IN THIS CHAPTER, you will learn about magnetism and the magnetic field.
More informationGeneral Physics II. Magnetic Fields and Forces
General Physics II Magnetic Fields and Forces 1 Magnetism Magnetism underlies the operation of the hard disk drive, which is the mainstay of modern electronic information storage, from computers to ipods.
More informationTorque on a Current Loop
Today Chapter 19 Magnetism Torque on a current loop, electrical motor Magnetic field around a current carrying wire. Ampere s law Solenoid Material magnetism Clicker 1 Which of the following is wrong?
More informationElements of Physics II. Agenda for Today
Physics 132: Lecture e 18 Elements of Physics II Agenda for Today Magnets and the Magnetic Field Magnetic fields caused by charged particles B-field from a current-carrying wire Magnetic fields and forces
More informationMAGNETIC FIELDS. - magnets have been used by our species for thousands of years. - for many of these years we had no clue how they worked:
MAGNETIC FIELDS A SHORT HISTORY OF MAGNETS: - magnets have been used by our species for thousands of years - for many of these years we had no clue how they worked: 200 BC an ancient civilization in Asia
More informationMAGNETIC FIELDS CHAPTER 21
MAGNETIC FIELDS CHAPTER 21 1. A magnetic field may exist at a point as a result of moving charged particle 2. When a tiny bar magnet is suspended horizontally from its center, it lines up along the north
More informationMagnetizing a substance
Magnetism What is a magnet? Any material that has the property of attracting Iron (or steel), Nickel or Cobalt Magnets exert a force on other magnets or particles with an electrical charge Magnets may
More informationTypes of Interactions Chapter Questions
Types of Interactions Chapter Questions Transfer of Forces 1. Forces are pushes/pulls of an object. Explain at least 4 forces that we observe in nature. 2. How are forces transferred without 2 objects
More informationMagnetism. Magnets. Section 1
Magnets More than 2,000 years ago Greeks discovered deposits of a mineral that was a natural magnet. The mineral is now called magnetite. In the twelfth century Chinese sailors used magnetite to make compasses
More informationName: Class: Date: AP Physics Spring 2012 Q6 Practice. Multiple Choice Identify the choice that best completes the statement or answers the question.
ame: Class: Date: ID: A AP Physics Spring 2012 Q6 Practice Multiple Choice Identify the choice that best completes the statement or answers the question. 1. (2 points) A potential difference of 115 V across
More informationDO PHYSICS ONLINE MOTORS AND GENERATORS MAGNETIC FIELDS
DO PHYSICS ONLINE MOTORS AND GENERATORS MAGNETIC FIELDS Powerful magnets are essential components in motors and generators. Some electric motors and generators rely upon a combination of a permanent and
More informationChapter 21. Magnetism
Chapter 21 Magnetism Magnets Poles of a magnet are the ends where objects are most strongly attracted Two poles, called north and south Like poles repel each other and unlike poles attract each other Similar
More informationReading Question 24.1
Reading Question 24.1 A compass in a magnetic field will line up A. With the north pole pointing in the direction of the magnetic field. B. With the north pole pointing opposite the direction of the magnetic
More informationChapter 22 Magnetism
Chapter 22 Magnetism 1 Overview of Chapter 22 The Magnetic Field The Magnetic Force on Moving Charges The Motion of Charged Particles in a Magnetic Field The Magnetic Force Exerted on a Current-Carrying
More informationKirchhoff s rules, example
Kirchhoff s rules, example Magnets and Magnetism Poles of a magnet are the ends where objects are most strongly attracted. Two poles, called north and south Like poles repel each other and unlike poles
More informationMagnetic Fields Permanent Magnets
1 Magnetic Fields Permanent Magnets Magnetic fields are continuous loops leaving a North pole and entering a South pole they point in direction that an isolated North would move Highest strength near poles
More informationThe initial magnetization curve shows the magnetic flux density that would result when an increasing magnetic field is applied to an initially
MAGNETIC CIRCUITS The study of magnetic circuits is important in the study of energy systems since the operation of key components such as transformers and rotating machines (DC machines, induction machines,
More informationNCERT solutions Magnetic effects of current (In-text questions)
NCERT solutions Magnetic effects of current (In-text questions) Page No: 224 Question 1 Why does a compass needle get deflected when brought near a bar magnet? Compass needle is a small permanent magnet.
More informationChapter 29. Magnetic Fields due to Currentss
Chapter 29 Magnetic Fields due to Currentss Refresher: The Magnetic Field Permanent bar magnets have opposite poles on each end, called north and south. Like poles repel; opposites attract. If a magnet
More information6.3 Magnetic Force and Field (4 hr)
6.3 Magnetic Force and Field (4 hr) Name Activity 631 Investigating Magnetic Field around a magnet Activity 632 Investigating Electric Field in a slinky. Activity 633 Build your own Electric Motor. Read
More informationElectricity and Magnetism
Electricity and Magnetism S8P5. Students will recognize the characteristics of gravity, electricity, and magnetism as major kinds of forces acting in nature. b. Demonstrate the advantages and disadvantages
More informationChapter 17: Magnetism
Chapter 17: Magnetism Section 17.1: The Magnetic Interaction Things You Already Know Magnets can attract or repel Magnets stick to some things, but not all things Magnets are dipoles: north and south Labels
More informationElectromagnetism. Chapter I. Figure 1.1: A schematic diagram of Earth s magnetic field. Sections 20-1, 20-13
Chapter I Electromagnetism Day 1 Magnetism Sections 20-1, 20-13 An investigation of permanent magnets shows that they only attract certain metals specifically those containing iron, or a few other materials,
More informationIII.Sources of Magnetic Fields - Ampere s Law - solenoids
Magnetism I. Magnetic Field - units, poles - effect on charge II. Magnetic Force on Current - parallel currents, motors III.Sources of Magnetic Fields - Ampere s Law - solenoids IV.Magnetic Induction -
More information4.7 Magnetism and electromagnetism
4.7 Magnetism and electromagnetism Electromagnetic effects are used in a wide variety of devices. Engineers make use of the fact that a magnet moving in a coil can produce electric current and also that
More informationGravity Electromagnetism Weak Strong
19. Magnetism 19.1. Magnets 19.1.1. Considering the typical bar magnet we can investigate the notion of poles and how they apply to magnets. 19.1.1.1. Every magnet has two distinct poles. 19.1.1.1.1. N
More information1. A solenoid is a powerful magnet that is created by looping a conductor and passing a current through the conductor.
Electricity and Magnetism Unit Test /60 Part A: True/False [5 K/U] In the blank provided, identify if the statement is true or false. If the statement is false, identify and correct the portion that is
More informationTOPIC 4.4: ELECTROMAGNETISM
TOPIC 4.4: ELECTROMAGNETISM The student will be able to: S3P-4-25: S3P-4-26: S3P-4-27: S3P-4-28: S3P-4-29: S3P-4-30: S3P-4-31: S3P-4-32: Describe and demonstrate the phenomenon of electromagnetism. Diagram
More informationMagnetism & EM Induction
Physics Traditional 1314 Williams Magnetism & EM Induction Chapters 19,20 2 Magnetism Notes Moving charges are the source of all magnetism. Since the smallest charge which can eist is an electron, and
More informationGeneral Physics (PHYS )
General Physics (PHYS ) Chapter 22 Magnetism Magnetic Force Exerted on a current Magnetic Torque Electric Currents, magnetic Fields, and Ampere s Law Current Loops and Solenoids Magnetism in Matter GOT
More informationMagnetism Intro. 1) Students will be able to describe the magnetic fields around bar magnets.
Magnetism Intro. 1) Students will be able to describe the magnetic fields around bar magnets. 2) Students will be able to use a compass to determine the direction of a magnetic field. 1 Teachers' notes
More informationCLASSROOM KIT ELECTROMAGNETS
CLASSROOM KIT ELECTROMAGNETS Page 1 1 Activity: What Do We Already Know? Teacher A simple, yet effective learning strategy, a K-W-L chart, is used to help Background: students clarify their ideas. The
More informationElectromagnetism Notes 1 Magnetic Fields
Electromagnetism Notes 1 Magnetic Fields Magnets can or other magnets. They are able to exert forces on each other without touching because they are surrounded by. Magnetic Flux refers to Areas with many
More informationB for a Long, Straight Conductor, Special Case. If the conductor is an infinitely long, straight wire, θ 1 = 0 and θ 2 = π The field becomes
B for a Long, Straight Conductor, Special Case If the conductor is an infinitely long, straight wire, θ 1 = 0 and θ 2 = π The field becomes μ I B = o 2πa B for a Curved Wire Segment Find the field at point
More informationSection 24.8 Magnets and Magnetic Materials Pearson Education, Inc.
Section 24.8 Magnets and Magnetic Materials A Current Loop in a Uniform Field Slide 24-2 A Current Loop in a Uniform Field A magnetic dipole will rotate to line up with a magnetic field just as an electric
More informationMAGNETISM. Magnetism. Magnetism is a result of electrons spinning on their own axis around the nucleus (Figure 18). Basic Electrical Theory
Basic Electrical Theory Certain metals and metallic oxides have the ability to attract other metals. This property is called magnetism, and the materials which have this property are called magnets. Some
More information4.7.1 Permanent and induced magnetism, magnetic forces and fields. Content Key opportunities for skills development
4.7 Magnetism and electromagnetism Electromagnetic effects are used in a wide variety of devices. Engineers make use of the fact that a magnet moving in a coil can produce electric current and also that
More informationChapter 27, 28 & 29: Magnetism & Electromagnetic Induction
Chapter 27, 28 & 29: Magnetism & Electromagnetic Induction The Magnetic Field The Magnetic Force on Moving Charges The Motion of Charged Particles in a Magnetic Field The Magnetic Force Exerted on a Current-Carrying
More information24 Magnetic Fields BIGIDEA Write the Big Idea for this chapter.
24 Magnetic Fields BIGIDEA Write the Big Idea for this chapter. Use the What I Know column to list the things you know about the Big Idea. Then list the questions you have about the Big Idea in the What
More informationPhysics 12. Unit 8 Magnetic Field and Electromagnetism Part I
Physics 12 Unit 8 Magnetic Field and Electromagnetism Part I 1. Basics about magnets Magnets have been known by ancient people since long time ago, referring to the iron-rich rocks, called magnetite or
More informationMagnetic Fields Part 2: Sources of Magnetic Fields
Magnetic Fields Part 2: Sources of Magnetic Fields Last modified: 08/01/2018 Contents Links What Causes a Magnetic Field? Moving Charges Right Hand Grip Rule Permanent Magnets Biot-Savart Law Magnetic
More informationStudent Exploration: Electromagnetic Induction
Name: Date: Student Exploration: Electromagnetic Induction Vocabulary: current, electric field, electromagnetic induction, magnetic field, magnetic flux, right-hand rule, vector, voltage, wind generator
More information8th Grade. Slide 1 / 38. Slide 2 / 38. Slide 3 / 38. Types of Interactions Study Guide
Slide 1 / 38 Slide 2 / 38 8th Grade Types of Interactions Study Guide 2015-08-26 www.njctl.org 1 Which of the following is NOT an example of a force being exerted through a field? Slide 3 / 38 Gravity
More informationSlide 1 / 24. Electromagnetic Induction 2011 by Bryan Pflueger
Slide 1 / 24 Electromagnetic Induction 2011 by Bryan Pflueger Slide 2 / 24 Induced Currents If we have a galvanometer attached to a coil of wire we can induce a current simply by changing the magnetic
More informationTypes of Magnetism and Magnetic Domains
Types of Magnetism and Magnetic Domains Magnets or objects with a Magnetic Moment A magnet is an object or material that attracts certain metals, such as iron, nickel and cobalt. It can also attract or
More informationSome History of Magnetism
Magnetism Some History of Magnetism The ancient Greeks were the first to observe magnetism. They studied the mineral magnetite. The poles of a magnet were observed to be south or north seeking. These properties
More informationLab 7: Magnetism Introduction Magnets need no introduction (i.e. introduction to be added in future revision).
CSUEB Physics 1780 Lab 7: Magnetism Page 1 Lab 7: Magnetism Introduction Magnets need no introduction (i.e. introduction to be added in future revision). Experiments The purpose of these experiments is
More informationDisplacement Current. Ampere s law in the original form is valid only if any electric fields present are constant in time
Displacement Current Ampere s law in the original form is valid only if any electric fields present are constant in time Maxwell modified the law to include timesaving electric fields Maxwell added an
More informationElectricity and Electromagnetism SOL review Scan for a brief video. A. Law of electric charges.
A. Law of electric charges. Electricity and Electromagnetism SOL review Scan for a brief video The law of electric charges states that like charges repel and opposite charges attract. Because protons and
More informationElectromagnetism. Kevin Gaughan for. Bristol Myers Squibb
Electromagnetism Kevin Gaughan for Bristol Myers Squibb Contents Magnets and Ferromagnetism Domains Theory H, B and µ The links between electricity and Magnetism Electromagnets Induction Applications of
More informationPHYS 1444 Section 003 Lecture #18
PHYS 1444 Section 003 Lecture #18 Wednesday, Nov. 2, 2005 Magnetic Materials Ferromagnetism Magnetic Fields in Magnetic Materials; Hysteresis Induced EMF Faraday s Law of Induction Lenz s Law EMF Induced
More informationMagnets. Magnetic vs. Electric
Magnets A force is applied to the iron filings causing them to align themselves to the direction of the magnetic field. A compass needle will tell you the direction of the field. Show Fields of little
More informationMay 08, Magnetism.notebook. Unit 9 Magnetism. This end points to the North; call it "NORTH." This end points to the South; call it "SOUTH.
Unit 9 Magnetism This end points to the North; call it "NORTH." This end points to the South; call it "SOUTH." 1 The behavior of magnetic poles is similar to that of like and unlike electric charges. Law
More informationMagnetic Quantities. Magnetic fields are described by drawing flux lines that represent the magnetic field.
Chapter 7 Magnetic fields are described by drawing flux lines that represent the magnetic field. Where lines are close together, the flux density is higher. Where lines are further apart, the flux density
More informationHIGH SCHOOL SCIENCE. Physical Science 7: Electricity & Magnetism
HIGH SCHOOL SCIENCE Physical Science 7: Electricity & Magnetism WILLMAR PUBLIC SCHOOL 2013-2014 EDITION CHAPTER 7 Electricity & Magnatism In this chapter you will: 1. Analyze factors that affect the strength
More informationChapter 4: Magnetic Field
Chapter 4: Magnetic Field 4.1 Magnetic Field 4.1.1 Define magnetic field Magnetic field is defined as the region around a magnet where a magnetic force can be experienced. Magnetic field has two poles,
More informationElectrics. Electromagnetism
Electrics Electromagnetism Electromagnetism Magnetism is associated with charges in motion (currents): microscopic currents in the atoms of magnetic materials. macroscopic currents in the windings of an
More informationPHYS 1442 Section 004 Lecture #14
PHYS 144 Section 004 Lecture #14 Wednesday March 5, 014 Dr. Chapter 1 Induced emf Faraday s Law Lenz Law Generator 3/5/014 1 Announcements After class pickup test if you didn t Spring break Mar 10-14 HW7
More information11/13/2018. The Hall Effect. The Hall Effect. The Hall Effect. Consider a magnetic field perpendicular to a flat, currentcarrying
The Hall Effect Consider a magnetic field perpendicular to a flat, currentcarrying conductor. As the charge carriers move at the drift speed v d, they will experience a magnetic force F B = ev d B perpendicular
More informationConsider a magnetic field perpendicular to a flat, currentcarrying
The Hall Effect Consider a magnetic field perpendicular to a flat, currentcarrying conductor. As the charge carriers move at the drift speed v d, they will experience a magnetic force F B = ev d B perpendicular
More informationLecture Outlines Chapter 22. Physics, 3 rd Edition James S. Walker
Lecture Outlines Chapter 22 Physics, 3 rd Edition James S. Walker 2007 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the use of instructors in
More informationMagnetic Forces and Fields
Magnetic Forces and Fields Physics 102 Lecture 3 21 February 2002 IF NOT REGISTERED FOR PHYSICS 102, SEE REGISTRAR ASAP, AND REGISTER 21 Feb 2002 Physics 102 Lecture 3 1 RC Puzzler 21 Feb 2002 Physics
More informationChapter 24: Magnetic Fields & Forces
Chapter 24: Magnetic Fields & Forces We live in a magnetic field. The earth behaves almost as if a bar magnet were located near its center. The earth s axis of rotation and Magnetic axis are not the same
More informationMagnetism. and its applications
Magnetism and its applications Laws of Magnetism 1) Like magnetic poles repel, and 2) unlike poles attract. Magnetic Direction and Strength Law 3 - Magnetic force, either attractive or repelling varies
More informationElements of Physics II. Agenda for Today. Physics 201: Lecture 1, Pg 1
Forces on currents Physics 132: Lecture e 19 Elements of Physics II Agenda for Today Currents are moving charges Torque on current loop Torque on rotated loop Currents create B-fields Adding magnetic fields
More informationMagnetism. Magnets and Magnetic Fields S N
Magnetism Magnets and Magnetic Fields What do you think? Read the two statements below and decide whether you agree or disagree with them. Place an A in the Before column if you agree with the statement
More information4.7 Magnetism and electromagnetism
4.7 Magnetism and electromagnetism Electromagnetic effects are used in a wide variety of devices. Engineers make use of the fact that a magnet moving in a coil can produce electric current and also that
More informationUniverse Video. Magnetic Materials and Magnetic Fields Lab Activity. Discussion of Magnetism and Magnetic Fields
Date Zero Hour In Class Homework Magnetism Intro: Mechanical 1/5 Tue (A) Universe Video 1/6 Wed (B) 1/7 Thur (C) Magnetic Materials and Magnetic Fields Lab Activity 1/8 Fri (A) Discussion of Magnetism
More informationDAY 12. Summary of Topics Covered in Today s Lecture. Magnetic Fields Exert Torques on a Loop of Current
DAY 12 Summary of Topics Covered in Today s Lecture Magnetic Fields Exert Torques on a Loop of Current Imagine a wire bent into the shape of a rectangle with height h and width w. The wire carries a current
More informationChapter 30. Sources of the Magnetic Field Amperes and Biot-Savart Laws
Chapter 30 Sources of the Magnetic Field Amperes and Biot-Savart Laws F B on a Charge Moving in a Magnetic Field Magnitude proportional to charge and speed of the particle Direction depends on the velocity
More informationGeneral Physics (PHY 2140)
General Physics (PHY 2140) Lecture 8 Electricity and Magnetism 1. Magnetism Application of magnetic forces Ampere s law 2. Induced voltages and induction Magnetic flux http://www.physics.wayne.edu/~alan/2140website/main.htm
More informationClass 11 : Magnetic materials
Class 11 : Magnetic materials Magnetic dipoles Magnetization of a medium, and how it modifies magnetic field Magnetic intensity How does an electromagnet work? Boundary conditions for B Recap (1) Electric
More information