Elements of Physics II. Agenda for Today. Physics 201: Lecture 1, Pg 1
|
|
- Emmeline Dorsey
- 5 years ago
- Views:
Transcription
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 Force between wires Physics 201: Lecture 1, Pg 1
2 Currents Create B-Fields Magnitude: I B 0 I 2 r Tm / A 7 B r Current I OUT r = distance from wire Direction of B-field from current carrying wire: Curly right hand rule Lines of B Thumb along current I, direction of B along curled fingers. Physics 201: Lecture 1, Pg 2
3 Clicker Question 9: A square loop of wire carries a current I. Current is flowing in a counterclockwise direction as shown. What is the direction of the magnetic field at A? (a) (b) (c) into the page out of the page the B-field is zero Physics 201: Lecture 1, Pg 3
4 B-Field Caused by a Looped Wire If we make a current carrying wire into a loop, what total B-field will it make? B-field points out of loop!! Bottom? Right side? Left side? Top? Total field??? Curly right hand rule Physics 201: Lecture 1, Pg 4
5 Magnetic Field of a Current Loop Total Field Physics 201: Lecture 1, Pg 5
6 Current Loop Physics 201: Lecture 1, Pg 6
7 Current Loop is a Magnetic Dipole Physics 201: Lecture 1, Pg 7
8 RHR Physics 201: Lecture 1, Pg 8
9 Right Hand Rule B-field = magnetic field B-field Right-hand rule Find the B-field for current carrying loop: Fingers in direction of current Thumb gives direction of B-field Physics 201: Lecture 1, Pg 9
10 Clicker Question 3.5: The diagram below shows a current loop perpendicular to the page; the view is a slice through the loop. The direction of the current in the wire at the top and the bottom is shown. What is the direction of the magnetic field at a point in the center of the loop? A. To the left B. Up C. To the right D. Down Physics 201: Lecture 1, Pg 10
11 Magnetic Dipole Moment The magnetic dipole moment of a current loop enclosing an area A is defined as: Physics 201: Lecture 1, Pg 11
12 Clicker Question 2: What is the current direction in the loop? A. Out at the top, in at the bottom. B. In at the top, out at the bottom. C. Either A or B would cause the current loop and the bar magnet to repel each other. Physics 201: Lecture 1, Pg 12
13 Clicker Question 3: Does the bar magnet attract, repel, or have no effect on the loop? A. Attract B. Repel C. No effect Physics 201: Lecture 1, Pg 13
14 Clicker Question: The diagram below shows slices through two adjacent current loops. Think about the force exerted on the loop on the right due to the loop on the left. The force on the right loop is directed A. to the left. B. up. C. to the right. D. down. Physics 201: Lecture 1, Pg 14
15 Line Integrals Figure (a) shows a curved line from i to f. The length l of this line can be found by doing a line integral: Physics 201: Lecture 1, Pg 15
16 Line Integrals Physics 201: Lecture 1, Pg 16
17 Line Integrals Physics 201: Lecture 1, Pg 17
18 What is the line integral of Example: between points i and f, in the figure? Physics 201: Lecture 1, Pg 18
19 Ampere s Law We know a little bit about finding the B-field if we know what the moving charges are doing Now we will learn a technique to find what the charges are doing based on the B-field This is called Ampere s law Physics 201: Lecture 1, Pg 19
20 Clicker Question 4: (Ampere s Law) A long, straight wire extends into and out of the screen. The current in the wire is A. Into the screen. B. Out of the screen. C. There is no current in the wire. D. Not enough info to tell the direction. Physics 201: Lecture 1, Pg 20
21 Ampere s Law Because the B-field is tangent to the circle and of constant magnitude at every point on the circle, we can write: Here B 0 I/2 d, where I is the current through h this loop, hence: Physics 201: Lecture 1, Pg 21
22 Whenever total current I through passes through h an area bounded by a closed curve, the line integral of the magnetic field around the curve is given by Ampère s law: Ampere s Law Physics 201: Lecture 1, Pg 22
23 Clicker Question 5: For the path shown, A. 0. B. 0 (I 1 I 2 ). C. 0 (I 1 I 2 ). D. 0 (I 2 I 1 ). Physics 201: Lecture 1, Pg 23
24 The value of Clicker Question 6: T m around the closed path in the figure. What is I 3. Physics 201: Lecture 1, Pg 24
25 Ampere s Law Physics 201: Lecture 1, Pg 25
26 Solenoids Physics 201: Lecture 1, Pg 26
27 Solenoid Physics 201: Lecture 1, Pg 27
28 Solenoids: Ampere s Law Physics 201: Lecture 1, Pg 28
29 Solenoids: Ampere s Law Physics 201: Lecture 1, Pg 29
30 Solenoids: B Magnitude Magnitude of field inside of solenoid : B= ni n is the number of turns of wire/meter on solenoid. For example, if there are 8 turns and the solenoid is 5 cm long, n 8 turns.05 meter 160 turns / m Physics 201: Lecture 1, Pg 30
31 Solenoids: B Magnitude Physics 201: Lecture 1, Pg 31
32 Clicker Question 7: Solenoid 2 has twice the diameter, twice the length, and twice as many turns as solenoid 1. How does the field B 2 at the center of solenoid 2 compare to B 1 at the center of solenoid 1? A. B 2 B 1 /4. B. B 2 B 1 /2. C. B 2 B 1. D. B 2 2B 1. E. B 2 4B 1. Physics 201: Lecture 1, Pg 32
33 Clicker Question 8: The current in this solenoid A. Enters on the left, leaves on the right. B. Enters on the right, leaves on the left. C. Either A or B would produce this field. Physics 201: Lecture 1, Pg 33
34 Solenoid A uniform magnetic field can be generated with a solenoid. A solenoid is a helical coil of wire with the same current I passing through each loop in the coil. Solenoids may have hundreds or thousands of coils, often called turns, sometimes wrapped in several layers. The magnetic field is strongest t and most uniform inside the solenoid. Physics 201: Lecture 1, Pg 34
35 Solenoid The magnetic field outside a solenoid looks like that of a bar magnet. Thus a solenoid is an electromagnet, and you can use the right-hand rule to identify the north-pole end. Physics 201: Lecture 1, Pg 35
36 MRI This patient is undergoing magnetic resonance imaging (MRI). The large cylinder surrounding the patient contains a solenoid that is wound with superconducting wire to generate a strong uniform magnetic field. Physics 201: Lecture 1, Pg 36
37 Clicker Question 9: What is the net force between the two solenoids? (a) Attractive (b) Repulsive (c) No force Physics 201: Lecture 1, Pg 37
Agenda for Today. Elements of Physics II. Forces on currents
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 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 informationAmpere s law. Lecture 15. Chapter 32. Physics II. Course website:
Lecture 15 Chapter 32 Physics II Ampere s law Course website: http://faculty.uml.edu/andriy_danylov/teaching/physicsii Ampere s Law Electric Field From Coulomb s law 1 4 Magnetic Field Bio-Savart law 4
More informationPhys 102 Lecture 12 Currents & magnetic fields
Phys 102 Lecture 12 Currents & magnetic fields 1 Today we will... Learn how magnetic fields are created by currents Use specific examples Long straight wire Current loop Solenoid Apply these concepts Electromagnets
More informationIntermediate Physics PHYS102
Intermediate Physics PHYS102 Dr Richard H. Cyburt Assistant Professor of Physics My office: 402c in the Science Building My phone: (304) 384-6006 My email: rcyburt@concord.edu My webpage: www.concord.edu/rcyburt
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 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 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 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 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 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 informationAgenda for Today. Elements of Physics II. Forces on currents
Forces on currents Physics 132: Lecture e 20 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 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 informationMarch 11. Physics 272. Spring Prof. Philip von Doetinchem
Physics 272 March 11 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 - 32 Summary Magnetic
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 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 informationLECTURE 22 MAGNETIC TORQUE & MAGNETIC FIELDS. Instructor: Kazumi Tolich
LECTURE 22 MAGNETIC TORQUE & MAGNETIC FIELDS Instructor: Kazumi Tolich Lecture 22 2! Reading chapter 22.5 to 22.7! Magnetic torque on current loops! Magnetic field due to current! Ampere s law! Current
More informationMagnetic Force Cyclotron motion
Lecture 15 Chapter 29 Physics II Magnetic Force Cyclotron motion Course website: http://faculty.uml.edu/andriy_danylov/teaching/physicsii Today we are going to discuss: Chapter 29: Section 29.7 (Skip the
More informationCH 19-1 Magnetic Field
CH 19-1 Magnetic Field Important Ideas A moving charged particle creates a magnetic field everywhere in space around it. If the particle has a velocity v, then the magnetic field at this instant is tangent
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 informationMagnetic Fields due to Currents
Observation: a current of moving charged particles produces a magnetic field around the current. Chapter 29 Magnetic Fields due to Currents Magnetic field due to a current in a long straight wire a current
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 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 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 informationChapter 19. Magnetism
Chapter 19 Magnetism Magnetic Fields and Forces Fundamentally they do not exist If we had special relativity we would find there is no such thing as a magnetic field. It is only a relativistic transformation
More informationEvery magnet has a north pole and south pole.
Magnets - Intro The lodestone is a naturally occurring mineral called magnetite. It was found to attract certain pieces of metal. o one knew why. ome early Greek philosophers thought the lodestone had
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 informationPHYS152 Lecture 8. Eunil Won Korea University. Ch 30 Magnetic Fields Due to Currents. Fundamentals of Physics by Eunil Won, Korea University
PHYS152 Lecture 8 Ch 3 Magnetic Fields Due to Currents Eunil Won Korea University Calculating the Magnetic Field Due to a Current Recall that we had the formula for the electrostatic force: d E = 1 ɛ dq
More informationChapter 24 Preview Looking Ahead
Chapter 24 Preview Looking Ahead Text p. 764 Slide 24-1 Chapter 24 Preview Looking Back: Electric Fields In Chapter 20, we described electric interactions between charged objects in terms of the field
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 informationAgenda for Today. Elements of Physics II. Lenz Law. Emf opposes change in flux Faraday s Law Induced EMF in a conducting loop
Lenz Law Physics 132: Lecture e 22 Elements of Physics II Agenda for Today Emf opposes change in flux Faraday s Law Induced EMF in a conducting loop Physics 201: Lecture 1, Pg 1 Lenz s Law Physics 201:
More informationPhysics 202, Lecture 13. Today s Topics. Magnetic Forces: Hall Effect (Ch. 27.8)
Physics 202, Lecture 13 Today s Topics Magnetic Forces: Hall Effect (Ch. 27.8) Sources of the Magnetic Field (Ch. 28) B field of infinite wire Force between parallel wires Biot-Savart Law Examples: ring,
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 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 information4. An electron moving in the positive x direction experiences a magnetic force in the positive z direction. If B x
Magnetic Fields 3. A particle (q = 4.0 µc, m = 5.0 mg) moves in a uniform magnetic field with a velocity having a magnitude of 2.0 km/s and a direction that is 50 away from that of the magnetic field.
More information11/21/2011. The Magnetic Field. Chapter 24 Magnetic Fields and Forces. Mapping Out the Magnetic Field Using Iron Filings
Chapter 24 Magnetic Fields and Forces Topics: Magnets and the magnetic field Electric currents create magnetic fields Magnetic fields of wires, loops, and solenoids Magnetic forces on charges and currents
More informationChapter 21. Magnetic Forces and Magnetic Fields
Chapter 21 Magnetic Forces and Magnetic Fields 21.1 Magnetic Fields The needle of a compass is permanent magnet that has a north magnetic pole (N) at one end and a south magnetic pole (S) at the other.
More informationMidterms and finals from previous 4 years are now posted on the website (under Exams link). Check the main course website for practice problems
Third WileyPlus homework set is posted Ch. 20: 90 and Ch. 21: 14,38 (Due today at 11:45 pm) Midterms and finals from previous 4 years are now posted on the website (under Exams link). Next week s lab:
More informationAgenda for Today. Elements of Physics II. Forces on currents
Forces on currents Physics 132: Lecture e 14 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 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 informationVersion The diagram below represents lines of magnetic flux within a region of space.
1. The diagram below represents lines of magnetic flux within a region of space. 5. The diagram below shows an electromagnet made from a nail, a coil of insulated wire, and a battery. The magnetic field
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 informationLecture PowerPoints. Chapter 20 Physics: Principles with Applications, 6 th edition Giancoli
Lecture PowerPoints Chapter 20 Physics: Principles with Applications, 6 th edition Giancoli 2005 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for
More informationPhysics / Higher Physics 1A. Electricity and Magnetism Revision
Physics / Higher Physics 1A Electricity and Magnetism Revision Electric Charges Two kinds of electric charges Called positive and negative Like charges repel Unlike charges attract Coulomb s Law In vector
More informationKey Contents. Magnetic fields and the Lorentz force. Magnetic force on current. Ampere s law. The Hall effect
Magnetic Fields Key Contents Magnetic fields and the Lorentz force The Hall effect Magnetic force on current The magnetic dipole moment Biot-Savart law Ampere s law The magnetic dipole field What is a
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 informationChapter 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 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 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 informationMagnetic Fields & Forces
Magnetic Fields & Forces Oersted discovered that an electric current will produce a magnetic field around conductor only a moving charge creates a magnetic field the magnetic field is circular around the
More informationConcept Questions with Answers. Concept Questions with Answers W11D2. Concept Questions Review
Concept Questions with W11D2 Concept Questions Review W11D2 2 Concept Questions with W7D1 W07D1 Magnetic Dipoles, Force and Torque on a Dipole, Experiment 2 W07D1 Magnetic Dipoles, Torque and Force on
More informationMagnetic Force. A vertical wire carries a current and is in a vertical magnetic field. What is the direction of the force on the wire?
Magnetic Force A vertical wire carries a current and is in a vertical magnetic field. What is the direction of the force on the wire? (a) left (b) right (c) zero (d) into the page (e) out of the page B
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 informationSources of Magnetic Field
Chapter 28 Sources of Magnetic Field PowerPoint Lectures for University Physics, 14th Edition Hugh D. Young and Roger A. Freedman Lectures by Jason Harlow Learning Goals for Chapter 28 Looking forward
More informationLast time. Gauss' Law: Examples (Ampere's Law)
Last time Gauss' Law: Examples (Ampere's Law) 1 Ampere s Law in Magnetostatics iot-savart s Law can be used to derive another relation: Ampere s Law The path integral of the dot product of magnetic field
More informationLecture PowerPoints. Chapter 20 Physics: Principles with Applications, 6 th edition Giancoli
Lecture PowerPoints Chapter 20 Physics: Principles with Applications, 6 th edition Giancoli 2005 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for
More informationElements of Physics II. Agenda for Today. Induced EMF. Force on moving charges Induced Current Magnetic Flux Area Vector. Physics 201: Lecture 1, Pg 1
Induced EMF Physics 132: Lecture e 21 Elements of Physics II Agenda for Today Force on moving charges Induced Current Magnetic Flux Area Vector Physics 201: Lecture 1, Pg 1 Clicker Question 11: A rectangular
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 informationChapter 20 Lecture Notes
Chapter 20 Lecture Notes Physics 2424 - Strauss Formulas: B = µ 0 I/2πr B = Nµ 0 I/(2R) B = µ 0 ni Σ B l = µ 0 I F = Bqv sinθ r = mv/bq m = (er 2 /2V) B 2 F = ILB sinθ τ = NIAB sinϕ F/L = I 2 I 1 µ 0 /2πd
More information21 MAGNETIC FORCES AND MAGNETIC FIELDS
CHAPTER 1 MAGNETIC FORCES AND MAGNETIC FIELDS ANSWERS TO FOCUS ON CONCEPTS QUESTIONS 1 (d) Right-Hand Rule No 1 gives the direction of the magnetic force as x for both drawings A and B In drawing C, the
More informationPHYSICS 3204 PUBLIC EXAM QUESTIONS (Magnetism &Electromagnetism)
PHYSICS 3204 PUBLIC EXAM QUESTIONS (Magnetism &Electromagnetism) NAME: August 2009---------------------------------------------------------------------------------------------------------------------------------
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 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 Magnetism
More informationMagnetic Fields & Forces
Magnetic Fields & Forces Oersted discovered that an electric current will produce a magnetic field around conductor only a moving charge creates a magnetic field the magnetic field is circular around the
More informationCurrent in a Magnetic Field Learning Outcomes. Force on a Current-Carrying Conductor
1 Current in a Magnetic Field Learning Outcomes Discuss the force on a current-carrying conductor in a magnetic field. Demonstrate this force. Solve problems about this force. Discuss applications of this
More informationHandout 8: Sources of magnetic field. Magnetic field of moving charge
1 Handout 8: Sources of magnetic field Magnetic field of moving charge Moving charge creates magnetic field around it. In Fig. 1, charge q is moving at constant velocity v. The magnetic field at point
More informationPhys102 Lecture 16/17 Magnetic fields
Phys102 Lecture 16/17 Magnetic fields Key Points Electric Currents Produce Magnetic Fields Force on an Electric Current in a Magnetic Field; Definition of B Force on an Electric Charge Moving in a Magnetic
More informationPhysics 132: Lecture 15 Elements of Physics II Agenda for Today
Physics 132: Lecture 15 Elements of Physics II Agenda for Today Lenz Law Emf opposes change in flux Faraday s Law Induced EMF in a conducting loop Physics 132: Lecture 15, Pg 1 Lenz s Law Physics 132:
More informationPhysics 1402: Lecture 18 Today s Agenda
Physics 1402: Lecture 18 Today s Agenda Announcements: Midterm 1 distributed available Homework 05 due Friday Magnetism Calculation of Magnetic Field Two ways to calculate the Magnetic Field: iot-savart
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 informationHomework. Suggested exercises: 32.1, 32.3, 32.5, 32.7, 32.9, 32.11, 32.13, 32.15, 32.18, 32.20, 32.24, 32.28, 32.32, 32.33, 32.35, 32.37, 32.
Homework Reading: Chap. 32 and Chap. 33 Suggested exercises: 32.1, 32.3, 32.5, 32.7, 32.9, 32.11, 32.13, 32.15, 32.18, 32.20, 32.24, 32.28, 32.32, 32.33, 32.35, 32.37, 32.39 Problems: 32.46, 32.48, 32.52,
More informationCh. 28: Sources of Magnetic Fields
Ch. 28: Sources of Magnetic Fields Electric Currents Create Magnetic Fields A long, straight wire A current loop A solenoid Slide 24-14 Biot-Savart Law Current produces a magnetic field The Biot-Savart
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 informationElements of Physics II. Agenda for Today. Induced EMF. Force on moving charges Induced Current Magnetic Flux Area Vector. Physics 201: Lecture 1, Pg 1
Induced EMF Physics 132: Lecture e 21 Elements of Physics II Agenda for Today Force on moving charges Induced Current Magnetic Flux Area Vector Physics 201: Lecture 1, Pg 1 Atomic Magnets A plausible explanation
More informationChapter 5. Electromagnetic Induction
Chapter 5 Electromagnetic Induction Overview In the last chapter, we studied how a current produces a magnetic field. Here we will study the reverse effect: A magnetic field can produce an electric field
More informationPhysics 10. Lecture 24A. "When you feel bad about yourself you reverse your magnet and repel people." --S A Grafio
Physics 10 Lecture 24A "When you feel bad about yourself you reverse your magnet and repel people." --S A Grafio History of Magnets Magnets were discovered by early man. Asia Minor has region known as
More informationCh 30 - Sources of Magnetic Field
Ch 30 - Sources of Magnetic Field Currents produce Magnetism? 1820, Hans Christian Oersted: moving charges produce a magnetic field. The direction of the field is determined using a RHR. Oersted (1820)
More informationPhys 102 Lecture 11 Magnetic dipoles & current loops
Phys 102 Lecture 11 Magnetic dipoles & current loops 1 Today we will... Learn how magnetic fields act on Magnetic dipoles Current loops Apply these concepts! Magnetotactic bacteria Principles behind NMR/MRI,
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 informationChapter 28 Sources of Magnetic Field
Chapter 28 Sources of Magnetic Field In this chapter we investigate the sources of magnetic of magnetic field, in particular, the magnetic field produced by moving charges (i.e., currents). Ampere s Law
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 informationChapter 24. Magnetic Fields
Chapter 24 Magnetic Fields 1 Magnetic Poles Every magnet, regardless of its shape, has two poles Called north and south poles Poles exert forces on one another Similar to the way electric charges exert
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 informationCPS lesson Magnetism ANSWER KEY
CPS lesson Magnetism ANSWER KEY 1. Two wire strips carry currents from P to Q and from R to S. If the current directions in both wires are reversed, the net magnetic force of strip 1 on strip 2: * A. remains
More informationPhysics 115. Magnetic forces, Coils, Induction. General Physics II. Session 29
Physics 115 General Physics II Session 29 Magnetic forces, Coils, Induction R. J. Wilkes Email: phy115a@u.washington.edu Home page: http://courses.washington.edu/phy115a/ 5/22/14 1 Lecture Schedule Today
More informationForces & Magnetic Dipoles. Phys 122 Lecture 18 D. Hertzog
orces & Magnetic Dipoles µ = τ U AI = µ = µ θ θ. Phys 122 Lecture 18 D. Hertzog µ usiness Regrade requests by 4 pm riday (no eceptions) Solutions/Key posted on home page Last Time: The Lorentz orce and
More informationChapter 27 Magnetism. Copyright 2009 Pearson Education, Inc.
Chapter 27 Magnetism 27-1 Magnets and Magnetic Fields Magnets have two ends poles called north and south. Like poles repel; unlike poles attract. 27-1 Magnets and Magnetic Fields However, if you cut a
More informationThe Steady Magnetic Field LECTURE 7
The Steady Magnetic Field LECTURE 7 Learning Objectives Understand the Biot-Savart Law Understand the Ampere s Circuital Law Explain the Application of Ampere s Law Motivating the Magnetic Field Concept:
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 informationweek 8 The Magnetic Field
week 8 The Magnetic Field General Principles General Principles Applications Start with magnetic forces on moving charges and currents A positive charge enters a uniform magnetic field as shown. What is
More informationMagnetic Forces and Fields (Chapters 29-30)
Magnetic Forces and Fields (Chapters 29-30) Magnetism Magnetic Materials and Sources Magnetic Field, Magnetic Force Force on Moving Electric Charges Lorentz Force Force on Current Carrying Wires Applications
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 informationChapter 28 Magnetic Fields Sources
Chapter 28 Magnetic Fields Sources All known magnetic sources are due to magnetic dipoles and inherently macroscopic current sources or microscopic spins and magnetic moments Goals for Chapter 28 Study
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 informationPhysics Week 5(Sem. 2) Name. Magnetism. Chapter Summary. Magnetic Fields
Physics Week 5(Sem. 2) Name Chapter Summary Magnetism Magnetic Fields Permanent magnets have long been used in navigational compasses. The needle in a compass is supported to allow it to freely rotate
More information10/24/2012 PHY 102. (FAWOLE O.G.) Good day. Here we go..
Good day. Here we go.. 1 PHY102- GENERAL PHYSICS II Text Book: Fundamentals of Physics Authors: Halliday, Resnick & Walker Edition: 8 th Extended Lecture Schedule TOPICS: Dates Ch. 28 Magnetic Fields 12
More informationMagnetic field and magnetic poles
Magnetic field and magnetic poles Magnetic Field B is analogically similar to Electric Field E Electric charges (+ and -)are in analogy to magnetic poles(north:n and South:S). Paramagnetism, Diamagnetism,
More informationPhysics of Everyday Phenomena. Chapter 14
Physics of Everyday Phenomena W. Thomas Griffith Juliet W. Brosing Chapter 14 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Question 14.1 With magnets A) like
More informationMagnetic Force Cyclotron motion
Lecture 17 Chapter 29 Magnetic Force Cyclotron motion Messiah!? Miraculous appearance out of the blue. Course website: http://faculty.uml.edu/andriy_danylov/teaching/physicsii Today we are going to discuss:
More informationn Higher Physics 1B (Special) (PHYS1241) (6UOC) n Advanced Science n Double Degree (Science/Engineering) n Credit or higher in Physics 1A
Physics in Session 2: I n Physics / Higher Physics 1B (PHYS1221/1231) n Science, dvanced Science n Engineering: Electrical, Photovoltaic,Telecom n Double Degree: Science/Engineering n 6 UOC n Waves n Physical
More information