Magnetism, a history. Existence of a Magnetic Field, B. Magnetic Force on a charged particle. The particle in the figure

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Magnetism, a history. Existence of a Magnetic Field, B. Magnetic Force on a charged particle. The particle in the figure"

Transcription

1 Existence of a Magnetic Field, B Magnetic field, B, is a vector You may be familiar with bar magnets have a magnetic field similar to electric field of dipoles Amazing experimental finding: there is a relationship between moving charge (electricity) and magnetism (later we discover an even more profound result of this relationship!) Magnetism, a history 2000 years ago Greeks discovered magnetite attracts iron 1269 Pierre de Maricourt discovered magnets have two poles 1600 William Gilbert discovered Earth s magnetic field 1820 H.C. Oersted saw magnetic compass react to current 1820 Andre-Marie Ampere s experiment: magnet moved through a coil causes a current 1831 Michael Faraday s experiment: loop of current induces current in a second, non-attached loop of current 1856~1861James Clerk Maxwell develops field formalism and ties all equations together Also in 1861 presented world s first color photograph Magnetic Force on a charged particle Up till now, stationary charges (electrostatics) Consider forces between moving charges Experimental observation: a charged particle moving through a magnetic field experiences a force Surprisingly, the force is perpendicular to the magnetic field and the velocity Cross product (right hand rule) The left diagram shows a positively charged particle moving with velocity v in a magnetic field B. Using the arrows in the right diagram, what is the direction of the magnetic force on the particle? The left diagram shows a force F on a negatively charged particle moving a magnetic field B. Using the arrows in the right diagram, what is the direction of the velocity of the particle? The particle in the figure A. is positively charged. B. is negatively charged. C. could be negatively or positively charged. 1

2 If the magnetic field vector is directed toward the north and a positively charged particle is moving toward the east, what is the direction of the magnetic force on the particle? A. up B. west C. south D. down E. east The region of space around a moving proton contains A. a magnetic field only. B. an electric field only. C. both an electric and a magnetic field. D. neither an electric nor a magnetic field. The magnetic force on a charged particle A. depends on the sign of the charge on the particle. B. depends on the velocity of the particle. C. depends on the magnetic field at the particle's instantaneous position. D. is at right angles to both the velocity and the direction of the magnetic field. E. is described by all of these. Example 26-1, work in groups The magnetic field of the earth is 0.6 X10-4 T and is tilted downward making an angle of about 70 degrees with the horizontal in the northern hemisphere. A proton is moving horizontally in the northward direction with speed 1 X10 7 m/s. Calculate the magnetic force on the proton. The north pole on earth is the magnetic south pole and magnetic field lines point from magnetic north to magnetic south. Magnetic force on a wire or current element On a straight segment Ex 26-2 On a curved wire segment Ex 26-3 Finding dl is the hard part 2

3 Motion of a point charge in a magnetic field Revisit Newton s 2nd law Centripetal acceleration Cyclotron frequency and period Directing charged particles, particle accelerators (like at SLAC, RHIC, and CERN) Example 26-4 A proton moves in a circle of radius perpendicular to a magnetic field B. Find the speed and period of the motion. Call the proton mass m and the charge e. For a force to do work on an object, at least some part of the force must act in the direction of the distance moved by the object. F The block moves to the right. Which diagrams show the force (big white arrow) doing work on the block? Magnetic Forces do no Work! Does a magnetic force do work on a moving charged particle? Magnetic forces may alter the direction of motion of a particle but they will not speed up or slow it down. Electric fields can do work (apply a force in the direction of motion) 3

4 Aurora Borealis (the northern lights) Charged particles get trapped in the earth s magnetic field (spinning around the field lines), they hit particles in our atmosphere and emit a color depending on the atmospheric particle hit Aurora Borealis NASA tracks auroras (video) Running a current through a loop of wire creates a magnetic field Draw this field. Current loops are right handed Torques on current loops Magnetic dipole moment of a current loop Torque on a current loop in an external magnetic field. Magnetic field produced by moving point charges Moving charges create a magnetic field Current (bunch of moving charges) creates a magnetic field In the equations to find this B, vector directions are the involved part µ 0 = Permeability of free space (space that doesn t have materials in it) 4

5 Introducing: the Biot-Savart Law Used to find the magnetic field away from current carrying wires of any shape We must pay attention to vectors and integrate! Sometimes its convenient to use Biot- Savart to find B magnitude and use r.h.r. to find direction of B. Example: Find B from a current loop. Remember the magnetic field is a vector! It is perpendicular to the current, B is particular to different locations so you can t just say B anywhere, you must specify where (the problem usually asks for a location) Example: Find B a distance R from a straight wire segment. Draw a picture! What direction will B be in? Define variables in Biot-Savart Law Integrate. What are the limits of integration? What if the wire is infinite in length, how do we change the limits of integration? Example 27-7 Find the magnetic field at the center of a square current loop that has edges of length L = 50 cm and carries a current equal to 1.5 A. 5

Magnetic Forces cont.

Magnetic Forces cont. Magnetic Fields Magnetism Magnets can exert forces on each other. The magnetic forces between north and south poles have the property that like poles repel each other, and unlike poles attract. This behavior

More information

Sources of Magnetic Field: Summary

Sources of Magnetic Field: Summary Sources of Magnetic Field: Summary Single Moving Charge (Biot-Savart for a charge): Steady Current in a Wire (Biot-Savart for current): Infinite Straight Wire: Direction is from the Right Hand Rule The

More information

Chapter 19 Magnetic Forces and Fields

Chapter 19 Magnetic Forces and Fields Chapter 19 Magnetic Forces and Fields Student: 3. The magnetism of the Earth acts approximately as if it originates from a huge bar magnet within the Earth. Which of the following statements are true?

More information

Magnetic Field and Magnetic Forces

Magnetic Field and Magnetic Forces Chapter 27 Magnetic Field and Magnetic Forces PowerPoint Lectures for University Physics, Thirteenth Edition Hugh D. Young and Roger A. Freedman Lectures by Wayne Anderson Goals for Chapter 27 To study

More information

Chapter 29. Magnetic Fields

Chapter 29. Magnetic Fields Chapter 29 Magnetic Fields A Brief History of Magnetism 13 th century BC Chinese used a compass 800 BC Uses a magnetic needle Probably an invention of Arabic or Indian origin Greeks Discovered magnetite

More information

Conceptual: 1, 3, 5, 6, 8, 16, 18, 19. Problems: 4, 6, 8, 11, 16, 20, 23, 27, 34, 41, 45, 56, 60, 65. Conceptual Questions

Conceptual: 1, 3, 5, 6, 8, 16, 18, 19. Problems: 4, 6, 8, 11, 16, 20, 23, 27, 34, 41, 45, 56, 60, 65. Conceptual Questions Conceptual: 1, 3, 5, 6, 8, 16, 18, 19 Problems: 4, 6, 8, 11, 16, 20, 23, 27, 34, 41, 45, 56, 60, 65 Conceptual Questions 1. The magnetic field cannot be described as the magnetic force per unit charge

More information

Chapter 19: Magnetic Forces and Fields

Chapter 19: Magnetic Forces and Fields Chapter 19: Magnetic Forces and Fields Magnetic Fields Magnetic Force on a Point Charge Motion of a Charged Particle in a Magnetic Field Crossed E and B fields Magnetic Forces on Current Carrying Wires

More information

Chapter 14: Magnets and Electromagnetism

Chapter 14: Magnets and Electromagnetism Chapter 14: Magnets and Electromagnetism 1. Electrons flow around a circular wire loop in a horizontal plane, in a direction that is clockwise when viewed from above. This causes a magnetic field. Inside

More information

Nowadays we know that magnetic fields are set up by charges in motion, as in

Nowadays we know that magnetic fields are set up by charges in motion, as in 6 Magnetostatics 6.1 The magnetic field Although the phenomenon of magnetism was known about as early as the 13 th century BC, and used in compasses it was only in 1819 than Hans Oersted recognised that

More information

1 of 7 4/13/2010 8:05 PM

1 of 7 4/13/2010 8:05 PM Chapter 33 Homework Due: 8:00am on Wednesday, April 7, 2010 Note: To understand how points are awarded, read your instructor's Grading Policy [Return to Standard Assignment View] Canceling a Magnetic Field

More information

2015 Pearson Education, Inc. Section 24.5 Magnetic Fields Exert Forces on Moving Charges

2015 Pearson Education, Inc. Section 24.5 Magnetic Fields Exert Forces on Moving Charges Section 24.5 Magnetic Fields Exert Forces on Moving Charges Magnetic Fields Sources of Magnetic Fields You already know that a moving charge is the creator of a magnetic field. Effects of Magnetic Fields

More information

Chapter 14 Magnets and Electromagnetism

Chapter 14 Magnets and Electromagnetism Chapter 14 Magnets and Electromagnetism Magnets and Electromagnetism In the 19 th century experiments were done that showed that magnetic and electric effects were just different aspect of one fundamental

More information

Physics Notes for Class 12 Chapter 4 Moving Charges and Magnetrism

Physics Notes for Class 12 Chapter 4 Moving Charges and Magnetrism 1 P a g e Physics Notes for Class 12 Chapter 4 Moving Charges and Magnetrism Oersted s Experiment A magnetic field is produced in the surrounding of any current carrying conductor. The direction of this

More information

Physics 126 Practice Exam #3 Professor Siegel

Physics 126 Practice Exam #3 Professor Siegel Physics 126 Practice Exam #3 Professor Siegel Name: Lab Day: 1. Which one of the following statements concerning the magnetic force on a charged particle in a magnetic field is true? A) The magnetic force

More information

1. Units of a magnetic field might be: A. C m/s B. C s/m C. C/kg D. kg/c s E. N/C m ans: D

1. Units of a magnetic field might be: A. C m/s B. C s/m C. C/kg D. kg/c s E. N/C m ans: D Chapter 28: MAGNETIC FIELDS 1 Units of a magnetic field might be: A C m/s B C s/m C C/kg D kg/c s E N/C m 2 In the formula F = q v B: A F must be perpendicular to v but not necessarily to B B F must be

More information

Chapter 19 Magnetism Magnets Poles of a magnet are the ends where objects are most strongly attracted Two poles, called north and south Like poles

Chapter 19 Magnetism Magnets Poles of a magnet are the ends where objects are most strongly attracted Two poles, called north and south Like poles Chapter 19 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 information

Lecture PowerPoints. Chapter 20 Physics: Principles with Applications, 7 th edition Giancoli

Lecture PowerPoints. Chapter 20 Physics: Principles with Applications, 7 th edition Giancoli Lecture PowerPoints Chapter 20 Physics: Principles with Applications, 7 th edition Giancoli This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching

More information

physics 112N magnetic fields and forces

physics 112N magnetic fields and forces physics 112N magnetic fields and forces bar magnet & iron filings physics 112N 2 bar magnets physics 112N 3 the Earth s magnetic field physics 112N 4 electro -magnetism! is there a connection between electricity

More information

Chapter 29. Magnetic Fields

Chapter 29. Magnetic Fields Chapter 29 Magnetic Fields A Partial History of Magnetism 13 th century BC Chinese used a compass 800 BC Uses a magnetic needle Probably an invention of Arabic or Indian origin Greeks Discovered magnetite

More information

Magnets. We have all seen the demonstration where you put a magnet under a piece of glass, put some iron filings on top and see the effect.

Magnets. We have all seen the demonstration where you put a magnet under a piece of glass, put some iron filings on top and see the effect. Magnets We have all seen the demonstration where you put a magnet under a piece of glass, put some iron filings on top and see the effect. What you are seeing is another invisible force field known as

More information

Physics 30 Worksheet #10 : Magnetism From Electricity

Physics 30 Worksheet #10 : Magnetism From Electricity Physics 30 Worksheet #10 : Magnetism From Electricity 1. Draw the magnetic field surrounding the wire showing electron current below. x 2. Draw the magnetic field surrounding the wire showing electron

More information

Chapter 27 Magnetic Fields and Magnetic Forces

Chapter 27 Magnetic Fields and Magnetic Forces Chapter 27 Magnetic Fields and Magnetic Forces In this chapter we investigate forces exerted by magnetic fields. In the next chapter we will study the sources of magnetic fields. The force produced by

More information

Phys222 Winter 2012 Quiz 4 Chapters 29-31. Name

Phys222 Winter 2012 Quiz 4 Chapters 29-31. Name Name If you think that no correct answer is provided, give your answer, state your reasoning briefly; append additional sheet of paper if necessary. 1. A particle (q = 5.0 nc, m = 3.0 µg) moves in a region

More information

Magnetic Fields. I. Magnetic Field and Magnetic Field Lines

Magnetic Fields. I. Magnetic Field and Magnetic Field Lines Magnetic Fields I. Magnetic Field and Magnetic Field Lines A. The concept of the magnetic field can be developed in a manner similar to the way we developed the electric field. The magnitude of the magnetic

More information

THE MAGNETIC FIELD. 9. Magnetism 1

THE MAGNETIC FIELD. 9. Magnetism 1 THE MAGNETIC FIELD Magnets always have two poles: north and south Opposite poles attract, like poles repel If a bar magnet is suspended from a string so that it is free to rotate in the horizontal plane,

More information

Fall 12 PHY 122 Homework Solutions #8

Fall 12 PHY 122 Homework Solutions #8 Fall 12 PHY 122 Homework Solutions #8 Chapter 27 Problem 22 An electron moves with velocity v= (7.0i - 6.0j)10 4 m/s in a magnetic field B= (-0.80i + 0.60j)T. Determine the magnitude and direction of the

More information

1. Separation is easy with a magnet (try it and be amazed!).

1. Separation is easy with a magnet (try it and be amazed!). EXERCISES 1. Separation is easy with a magnet (try it and be amazed!). 2. All magnetism originates in moving electric charges. For an electron there is magnetism associated with its spin about its own

More information

(b) Draw the direction of for the (b) Draw the the direction of for the

(b) Draw the direction of for the (b) Draw the the direction of for the 2. An electric dipole consists of 2A. A magnetic dipole consists of a positive charge +Q at one end of a bar magnet with a north pole at one an insulating rod of length d and a end and a south pole at

More information

TIME OF COMPLETION DEPARTMENT OF NATURAL SCIENCES. PHYS 2212, Exam 2 Section 1 Version 1 April 16, 2014 Total Weight: 100 points

TIME OF COMPLETION DEPARTMENT OF NATURAL SCIENCES. PHYS 2212, Exam 2 Section 1 Version 1 April 16, 2014 Total Weight: 100 points TIME OF COMPLETION NAME DEPARTMENT OF NATURAL SCIENCES PHYS 2212, Exam 2 Section 1 Version 1 April 16, 2014 Total Weight: 100 points 1. Check your examination for completeness prior to starting. There

More information

Physics 202, Lecture 11. Exam 1 Results

Physics 202, Lecture 11. Exam 1 Results Physics 202, Lecture 11 Today s Topics Exam 1 Result Magnetic ields and orces (Ch. 29) Magnetic materials Magnetic forces on moving point charges Magnetic forces on currents, current loops Motion of charge

More information

Chapter 22 Magnetism

Chapter 22 Magnetism 22.6 Electric Current, Magnetic Fields, and Ampere s Law Chapter 22 Magnetism 22.1 The Magnetic Field 22.2 The Magnetic Force on Moving Charges 22.3 The Motion of Charged particles in a Magnetic Field

More information

Chapter 14 Magnets and

Chapter 14 Magnets and Chapter 14 Magnets and Electromagnetism How do magnets work? What is the Earth s magnetic field? Is the magnetic force similar to the electrostatic force? Magnets and the Magnetic Force! We are generally

More information

Magnetic Field and Magnetic Forces

Magnetic Field and Magnetic Forces Chapter 27 Magnetic Field and Magnetic Forces PowerPoint Lectures for University Physics, Thirteenth Edition Hugh D. Young and Roger A. Freedman Lectures by Wayne Anderson Goals for Chapter 27 Magnets

More information

Magnetism. d. gives the direction of the force on a charge moving in a magnetic field. b. results in negative charges moving. clockwise.

Magnetism. d. gives the direction of the force on a charge moving in a magnetic field. b. results in negative charges moving. clockwise. Magnetism 1. An electron which moves with a speed of 3.0 10 4 m/s parallel to a uniform magnetic field of 0.40 T experiences a force of what magnitude? (e = 1.6 10 19 C) a. 4.8 10 14 N c. 2.2 10 24 N b.

More information

Magnetic Field & Right Hand Rule. Academic Resource Center

Magnetic Field & Right Hand Rule. Academic Resource Center Magnetic Field & Right Hand Rule Academic Resource Center Magnetic Fields And Right Hand Rules By: Anthony Ruth Magnetic Fields vs Electric Fields Magnetic fields are similar to electric fields, but they

More information

Moving Charge in Magnetic Field

Moving Charge in Magnetic Field Chapter 1 Moving Charge in Magnetic Field Day 1 Introduction Two bar magnets attract when opposite poles (N and S, or and N) are next to each other The bar magnets repel when like poles (N and N, or S

More information

Pearson Physics Level 30 Unit VI Forces and Fields: Chapter 12 Solutions

Pearson Physics Level 30 Unit VI Forces and Fields: Chapter 12 Solutions Concept Check (top) Pearson Physics Level 30 Unit VI Forces and Fields: Chapter 1 Solutions Student Book page 583 Concept Check (bottom) The north-seeking needle of a compass is attracted to what is called

More information

Essential Physics II. Lecture 8:

Essential Physics II. Lecture 8: Essential Physics II E II Lecture 8: 16-12-15 News Schedule change: Monday 7th December ( ) NO CLASS! Thursday 26th November ( ) 18:15-19:45 This week s homework: 11/26 (next lecture) Next week s homework:

More information

5 Magnets and electromagnetism

5 Magnets and electromagnetism Magnetism 5 Magnets and electromagnetism n our modern everyday life, the phenomenon of magnetism is associated with iron that is attracted by permanent magnets that can also be made of iron compounds.

More information

Physics 2B. Lecture 29B

Physics 2B. Lecture 29B Physics 2B Lecture 29B "There is a magnet in your heart that will attract true friends. That magnet is unselfishness, thinking of others first. When you learn to live for others, they will live for you."

More information

Force on Moving Charges in a Magnetic Field

Force on Moving Charges in a Magnetic Field [ Assignment View ] [ Eðlisfræði 2, vor 2007 27. Magnetic Field and Magnetic Forces Assignment is due at 2:00am on Wednesday, February 28, 2007 Credit for problems submitted late will decrease to 0% after

More information

This Set o Slides - Day 20, Friday, Feb 19

This Set o Slides - Day 20, Friday, Feb 19 This Set o Slides - Day 20, Friday, Feb 19 Magnetic Field of Moving Charge or Current Biot-Savart Law Cross Product. Biot-Savart Law as cross product. More right hand rules. Three total! Similar but different!

More information

Chapter 27: Magnetic Field and Magnetic Forces

Chapter 27: Magnetic Field and Magnetic Forces Chapter 27: Magnetic Field and Magnetic Forces Magnetic field and magnets Magnetic flux and Gauss s law for magnetic field Magnetic force on moving charged objects Magnetic force on current-carrying wires

More information

Charged Particles Moving in an Magnetic Field

Charged Particles Moving in an Magnetic Field rev 12/2016 Charged Particles Moving in an Magnetic Field Equipment for Part 1 Qty Item Parts Number 1 Magnetic Field Sensor CI-6520A 1 Zero Gauss Chamber EM-8652 1 Dip Needle SF-8619 1 Angle Indicator

More information

Question Details C14: Magnetic Field Direction Abbott [ ]

Question Details C14: Magnetic Field Direction Abbott [ ] Phys 1114: Assignment 9 Abbott (5420633) Due: Mon Apr 7 2014 11:59 PM CDT Question 1 2 3 4 5 6 7 8 9 10 11 1. Question Details C14: Magnetic Field Direction Abbott [2861537] a) A wire is oriented horizontally

More information

Review Questions PHYS 2426 Exam 2

Review Questions PHYS 2426 Exam 2 Review Questions PHYS 2426 Exam 2 1. If 4.7 x 10 16 electrons pass a particular point in a wire every second, what is the current in the wire? A) 4.7 ma B) 7.5 A C) 2.9 A D) 7.5 ma E) 0.29 A Ans: D 2.

More information

Ch. 22: Magnetism. (Dr. Andrei Galiautdinov, UGA) 2014FALL - PHYS1112

Ch. 22: Magnetism. (Dr. Andrei Galiautdinov, UGA) 2014FALL - PHYS1112 Ch. 22: Magnetism (Dr. Andrei Galiautdinov, UGA) 2014FALL - PHYS1112 Part 1: Magnetic field Part 2: Magnetic force acting on a moving charge Part 3: Motion of charged particles in a magnetic field Part

More information

4. The units of the electric field are: A. N C 2 B. C/N C. N D. N/C E. C/m 2 ans: D

4. The units of the electric field are: A. N C 2 B. C/N C. N D. N/C E. C/m 2 ans: D Chapter 22: ELECTRIC FIELDS 1 An electric field is most directly related to: A the momentum of a test charge B the kinetic energy of a test charge C the potential energy of a test charge D the force acting

More information

Magnetic Field Lines. Uniform Magnetic Field. Earth s Magnetic Field 6/3/2013

Magnetic Field Lines. Uniform Magnetic Field. Earth s Magnetic Field 6/3/2013 Chapter 33: Magnetism Ferromagnetism Iron, cobalt, gadolinium strongly magnetic Can cut a magnet to produce more magnets (no magnetic monopole) Electric fields can magnetize nonmagnetic metals Heat and

More information

Physics 112 Homework 5 (solutions) (2004 Fall) Solutions to Homework Questions 5

Physics 112 Homework 5 (solutions) (2004 Fall) Solutions to Homework Questions 5 Solutions to Homework Questions 5 Chapt19, Problem-2: (a) Find the direction of the force on a proton (a positively charged particle) moving through the magnetic fields in Figure P19.2, as shown. (b) Repeat

More information

Magnetic Fields and Their Effects

Magnetic Fields and Their Effects Name Date Time to Complete h m Partner Course/ Section / Grade Magnetic Fields and Their Effects This experiment is intended to give you some hands-on experience with the effects of, and in some cases

More information

Magnetism Conceptual Questions. Name: Class: Date:

Magnetism Conceptual Questions. Name: Class: Date: Name: Class: Date: Magnetism 22.1 Conceptual Questions 1) A proton, moving north, enters a magnetic field. Because of this field, the proton curves downward. We may conclude that the magnetic field must

More information

Chapter 21. Magnetic Forces and Magnetic Fields

Chapter 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 information

Magnetic Forces and Magnetic Fields

Magnetic Forces and Magnetic Fields 1 Magnets Magnets are metallic objects, mostly made out of iron, which attract other iron containing objects (nails) etc. Magnets orient themselves in roughly a north - south direction if they are allowed

More information

Physics 12 Study Guide: Electromagnetism Magnetic Forces & Induction. Text References. 5 th Ed. Giancolli Pg

Physics 12 Study Guide: Electromagnetism Magnetic Forces & Induction. Text References. 5 th Ed. Giancolli Pg Objectives: Text References 5 th Ed. Giancolli Pg. 588-96 ELECTROMAGNETISM MAGNETIC FORCE AND FIELDS state the rules of magnetic interaction determine the direction of magnetic field lines use the right

More information

CET Moving Charges & Magnetism

CET Moving Charges & Magnetism CET 2014 Moving Charges & Magnetism 1. When a charged particle moves perpendicular to the direction of uniform magnetic field its a) energy changes. b) momentum changes. c) both energy and momentum

More information

Copyright 2014 Edmentum - All rights reserved.

Copyright 2014 Edmentum - All rights reserved. Copyright 2014 Edmentum - All rights reserved. Science Physics Electromagnetic Blizzard Bag 2014-2015 1. Two coils of insulated wire are placed side by side, as shown in the illustration. The blue lines

More information

ELECTROMAGNETISM I. CAUSES OF MAGNETISM

ELECTROMAGNETISM I. CAUSES OF MAGNETISM I. CAUSES OF MAGNETISM ELECTROMAGNETISM 1. Moving electric fields (moving charges) cause magnetism. Yes, that current moving in electric circuits cause a magnetic field. More later! 2. Elementary nature

More information

Lesson 12: Magnetic Forces and Circular Motion!

Lesson 12: Magnetic Forces and Circular Motion! Lesson 12: Magnetic Forces and Circular Motion If a magnet is placed in a magnetic field, it will experience a force. Types of magnets: Direction of the force on a permanent magnet: Direction of the force

More information

Section 9: Magnetic Forces on Moving Charges

Section 9: Magnetic Forces on Moving Charges Section 9: Magnetic Forces on Moving Charges In this lesson you will derive an expression for the magnetic force caused by a current carrying conductor on another current carrying conductor apply F = BIL

More information

PES 1120 Spring 2014, Spendier Lecture 27/Page 1

PES 1120 Spring 2014, Spendier Lecture 27/Page 1 PES 1120 Spring 2014, Spendier Lecture 27/Page 1 Today: - Magnetic Force on a current-carrying Wire - Torque on a current loop - Magnetic dipole moment - Next Week Monday Review, Wednesday EXAM 2 Last

More information

Physics 1653 Exam 3 - Review Questions

Physics 1653 Exam 3 - Review Questions Physics 1653 Exam 3 - Review Questions 3.0 Two uncharged conducting spheres, A and B, are suspended from insulating threads so that they touch each other. While a negatively charged rod is held near, but

More information

* Biot Savart s Law- Statement, Proof Applications of Biot Savart s Law * Magnetic Field Intensity H * Divergence of B * Curl of B. PPT No.

* Biot Savart s Law- Statement, Proof Applications of Biot Savart s Law * Magnetic Field Intensity H * Divergence of B * Curl of B. PPT No. * Biot Savart s Law- Statement, Proof Applications of Biot Savart s Law * Magnetic Field Intensity H * Divergence of B * Curl of B PPT No. 17 Biot Savart s Law A straight infinitely long wire is carrying

More information

Chapter 20. Magnetic Forces and Magnetic Fields

Chapter 20. Magnetic Forces and Magnetic Fields Chapter 20 Magnetic Forces and Magnetic Fields Magnetic Fields The most familiar example of magnetism for most people is a magnet. Every magnet has two poles, North and South --> called this since if the

More information

Chapter 27 Magnetic Field and Magnetic Forces

Chapter 27 Magnetic Field and Magnetic Forces Chapter 27 Magnetic Field and Magnetic Forces - Magnetism - Magnetic Field - Magnetic Field Lines and Magnetic Flux - Motion of Charged Particles in a Magnetic Field - Applications of Motion of Charged

More information

PHYS 155: Final Tutorial

PHYS 155: Final Tutorial Final Tutorial Saskatoon Engineering Students Society eric.peach@usask.ca April 13, 2015 Overview 1 2 3 4 5 6 7 Tutorial Slides These slides have been posted: sess.usask.ca homepage.usask.ca/esp991/ Section

More information

Eðlisfræði 2, vor 2007

Eðlisfræði 2, vor 2007 [ Assignment View ] [ Pri Eðlisfræði 2, vor 2007 28. Sources of Magnetic Field Assignment is due at 2:00am on Wednesday, March 7, 2007 Credit for problems submitted late will decrease to 0% after the deadline

More information

mv = ev ebr Application: circular motion of moving ions In a uniform magnetic field: The mass spectrometer KE=PE magnitude of electron charge

mv = ev ebr Application: circular motion of moving ions In a uniform magnetic field: The mass spectrometer KE=PE magnitude of electron charge 1.4 The Mass Spectrometer Application: circular motion of moving ions In a uniform magnetic field: The mass spectrometer mv r qb mv eb magnitude of electron charge 1 mv ev KEPE v 1 mv ebr m v e r m B m

More information

Magnetism Basics. Magnetic Domains: atomic regions of aligned magnetic poles Random Alignment Ferromagnetic Alignment. Net Effect = Zero!

Magnetism Basics. Magnetic Domains: atomic regions of aligned magnetic poles Random Alignment Ferromagnetic Alignment. Net Effect = Zero! Magnetism Basics Source: electric currents Magnetic Domains: atomic regions of aligned magnetic poles Random Alignment Ferromagnetic Alignment Net Effect = Zero! Net Effect = Additive! Bipolar: all magnets

More information

Eðlisfræði 2, vor 2007

Eðlisfræði 2, vor 2007 [ Assignment View ] [ Pri Eðlisfræði 2, vor 2007 29a. Electromagnetic Induction Assignment is due at 2:00am on Wednesday, March 7, 2007 Credit for problems submitted late will decrease to 0% after the

More information

Physics 19. Charge to Mass Ratio of the Electron

Physics 19. Charge to Mass Ratio of the Electron Physics 19 Charge to Mass Ratio of the Electron Revised 9/2012, ABG Theory Elementary particle physics has as its goal to know the properties of the many atomic and subatomic particles (mesons, quarks,

More information

Magnetic Fields ild and Forces

Magnetic Fields ild and Forces Magnetic Fields ild and Forces Physics 1 Facts about Magnetism Magnets have 2 poles (north and south) Like poles repel Unlike poles attract Magnets create a MAGNETIC FIELD around them Magnetic Field A

More information

Magnetic Fields. David J. Starling Penn State Hazleton PHYS 212

Magnetic Fields. David J. Starling Penn State Hazleton PHYS 212 Magnetism, as you recall from physics class, is a powerful force that causes certain items to be attracted to refrigerators. - Dave Barry David J. Starling Penn State Hazleton PHYS 212 Objectives (a) Determine

More information

ConcepTest PowerPoints

ConcepTest PowerPoints ConcepTest 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 information

My lecture slides are posted at Information for Physics 112 midterm, Wednesday, May 2

My lecture slides are posted at  Information for Physics 112 midterm, Wednesday, May 2 My lecture slides are posted at http://www.physics.ohio-state.edu/~humanic/ Information for Physics 112 midterm, Wednesday, May 2 1) Format: 10 multiple choice questions (each worth 5 points) and two show-work

More information

Module 3 : MAGNETIC FIELD Lecture 15 : Biot- Savarts' Law

Module 3 : MAGNETIC FIELD Lecture 15 : Biot- Savarts' Law Module 3 : MAGNETIC FIELD Lecture 15 : Biot- Savarts' Law Objectives In this lecture you will learn the following Study Biot-Savart's law Calculate magnetic field of induction due to some simple current

More information

MOVING CHARGES AND MAGNETISM

MOVING CHARGES AND MAGNETISM MOVING CHARGES AND MAGNETISM 1. A circular Coil of 50 turns and radius 0.2m carries of current of 12A Find (a). magnetic field at the centre of the coil and (b) magnetic moment associated with it. 3 scores

More information

2. B The magnetic properties of a material depend on its. A) shape B) atomic structure C) position D) magnetic poles

2. B The magnetic properties of a material depend on its. A) shape B) atomic structure C) position D) magnetic poles ame: Magnetic Properties 1. B What happens if you break a magnet in half? A) One half will have a north pole only and one half will have a south pole only. B) Each half will be a new magnet, with both

More information

21 MAGNETIC FORCES AND MAGNETIC FIELDS

21 MAGNETIC FORCES AND MAGNETIC FIELDS CHAPTER 21 MAGETIC ORCE AD MAGETIC IELD COCEPTUAL QUETIO 1. REAOIG AD OLUTIO Magnetic field lines, like electric field lines, never intersect. When a moving test charge is placed in a magnetic field so

More information

Homework #8 203-1-1721 Physics 2 for Students of Mechanical Engineering. Part A

Homework #8 203-1-1721 Physics 2 for Students of Mechanical Engineering. Part A Homework #8 203-1-1721 Physics 2 for Students of Mechanical Engineering Part A 1. Four particles follow the paths shown in Fig. 32-33 below as they pass through the magnetic field there. What can one conclude

More information

Chapter 20. Magnetic Forces and Magnetic Fields

Chapter 20. Magnetic Forces and Magnetic Fields Chapter 20 Magnetic Forces and Magnetic Fields The Motion of a Charged Particle in a Magnetic Field The circular trajectory. Since the magnetic force always remains perpendicular to the velocity, if a

More information

The Big Idea. Key Concepts

The Big Idea. Key Concepts The ig Idea For static electric charges, the electromagnetic force is manifested by the Coulomb electric force alone. If charges are moing, howeer, there is created an additional force, called magnetism.

More information

Force on a square loop of current in a uniform B-field.

Force on a square loop of current in a uniform B-field. Force on a square loop of current in a uniform B-field. F top = 0 θ = 0; sinθ = 0; so F B = 0 F bottom = 0 F left = I a B (out of page) F right = I a B (into page) Assume loop is on a frictionless axis

More information

2. A 200-N/C electric field is in the positive x direction. The force on an electron in this field is:

2. A 200-N/C electric field is in the positive x direction. The force on an electron in this field is: University Physics (Prof. David Flory) Chapt_23 Sunday, February 03, 2008 Page 1 Name: Date: 1. The dipole moment of an electric dipole in a 300-N/C electric field is initially perpendicular to the field,

More information

Physics 9 Fall 2009 Homework 7 - Solutions

Physics 9 Fall 2009 Homework 7 - Solutions Physics 9 Fall 009 Homework 7 - s 1. Chapter 33 - Exercise 10. At what distance on the axis of a current loop is the magnetic field half the strength of the field at the center of the loop? Give your answer

More information

Chapter 29. Magnetic Fields

Chapter 29. Magnetic Fields Chapter 29 Magnetic Fields CHAPTER OUTLNE 29.1 Magnetic Fields and Forces 29.2 Magnetic Force Acting on a Current-Carrying Conductor 29.3 Torque on a Current Loop in a Uniform Magnetic Field 29.4 Motion

More information

MAGNETISM MAGNETISM. Principles of Imaging Science II (120)

MAGNETISM MAGNETISM. Principles of Imaging Science II (120) Principles of Imaging Science II (120) Magnetism & Electromagnetism MAGNETISM Magnetism is a property in nature that is present when charged particles are in motion. Any charged particle in motion creates

More information

SPH4U Gravitational, Electrical and Magnetic Fields Lesson 1 Newtonian Gravitation Page 1 of 4

SPH4U Gravitational, Electrical and Magnetic Fields Lesson 1 Newtonian Gravitation Page 1 of 4 NEWTONIAN GRAVITATION Universal Law of Gravitation There is a gravitational force of attraction between any two objects. If the objects have masses m 1 and m 2 and their centres are separated by a distance

More information

Version PREVIEW Practice 8 carroll (11108) 1

Version PREVIEW Practice 8 carroll (11108) 1 Version PREVIEW Practice 8 carroll 11108 1 This print-out should have 12 questions. Multiple-choice questions may continue on the net column or page find all choices before answering. Inertia of Solids

More information

Chapter 26 Magnetism

Chapter 26 Magnetism What is the fundamental hypothesis of science, the fundamental philosophy? [It is the following:] the sole test of the validity of any idea is experiment. Richard P. Feynman 26.1 The Force on a Charge

More information

PH 212 07-31-2015 Physics 212 Exam-3 Solution NAME: Write down your name also on the back of the package of sheets you turn in.

PH 212 07-31-2015 Physics 212 Exam-3 Solution NAME: Write down your name also on the back of the package of sheets you turn in. PH 1 7-31-15 Physics 1 Exam-3 Solution NAME: Write down your name also on the back of the package of sheets you turn in. SIGNATURE and ID: Return this hard copy exam together with your other answer sheets.

More information

5.Magnetic Fields due to Currents( with Answers)

5.Magnetic Fields due to Currents( with Answers) 5.Magnetic Fields due to Currents( with Answers) 1. Suitable units for µ. Ans: TmA -1 ( Recall magnetic field inside a solenoid is B= µ ni. B is in tesla, n in number of turn per metre, I is current in

More information

Magnetism. Magnetism. Magnetic Fields and Magnetic Domains. Magnetic Fields and Magnetic Domains. Creating and Destroying a Magnet

Magnetism. Magnetism. Magnetic Fields and Magnetic Domains. Magnetic Fields and Magnetic Domains. Creating and Destroying a Magnet Magnetism Magnetism Opposite poles attract and likes repel Opposite poles attract and likes repel Like electric force, but magnetic poles always come in pairs (North, South) Like electric force, but magnetic

More information

SPH4U UNIVERSITY PHYSICS

SPH4U UNIVERSITY PHYSICS SPH4U UNIVERSITY PHYSICS GRAVITATIONAL, ELECTRIC, &... FIELDS L Magnetic Force on Moving Charges (P.386-391) Particle Accelerators As was stated earlier, the ability to accelerate charged particles with

More information

Magnets and the Magnetic Force

Magnets and the Magnetic Force Magnets and the Magnetic Force We are generally more familiar with magnetic forces than with electrostatic forces. Like the gravitational force and the electrostatic force, this force acts even when the

More information

** Can skip to Problems: 6, 7, 9, 15, 19, 28, 29, 35, 36, 39, 42 **

** Can skip to Problems: 6, 7, 9, 15, 19, 28, 29, 35, 36, 39, 42 ** Walker, Physics, 3 rd Edition Chapter 22 ** Can skip to Problems: 6, 7, 9, 15, 19, 28, 29, 35, 36, 39, 42 ** Conceptual Questions (Answers to odd-numbered Conceptual Questions can be found in the back

More information

Teacher Content Brief

Teacher Content Brief Teacher Content Brief Electric Motors Introduction Motors convert electric energy into mechanical energy. This mechanical energy turns the propellers on your Sea Perch. But what makes a motor spin? To

More information

Magnetic Field Strength: Force on a Moving Charge in a Magnetic Field

Magnetic Field Strength: Force on a Moving Charge in a Magnetic Field Magnetic Field Strength: Force on a Moving Charge in a Magnetic Field Bởi: OpenStaxCollege What is the mechanism by which one magnet exerts a force on another? The answer is related to the fact that all

More information

Chapter 27 Magnetic Field an Magnetic Forces Study magnetic forces. Consider magnetic field and flux

Chapter 27 Magnetic Field an Magnetic Forces Study magnetic forces. Consider magnetic field and flux Chapter 27 Magnetic Field an Magnetic Forces Study magnetic forces Consider magnetic field and flux Explore motion in a magnetic field Consider magnetic torque Apply magnetic principles and study the electric

More information

ElectroMagnetic Induction. AP Physics B

ElectroMagnetic Induction. AP Physics B ElectroMagnetic Induction AP Physics B What is E/M Induction? Electromagnetic Induction is the process of using magnetic fields to produce voltage, and in a complete circuit, a current. Michael Faraday

More information