Physics 230

Electricity and Magnetism

Spring Term, 2002

Lecture: 9:50 - 11:00 MWF, Youngchild 115

Professor: Matthew R. Stoneking

Office: Youngchild 110

Phone: X6724

email: stonekim

Office Hours: Tuesdays 1:30 PM-3:00 PM or by appointment

Catalog course description: Develops and explores Maxwell's equations: charge and current densities, particle motions, electrostatics, magnetostatics, induction, Maxwell's equations, electromagnetic waves, responses of matter. Prerequisites: Physics 150 and Mathematics 210. Offered every year.

Text:

Introduction to Electrodynamics, Third Edition, by David. J. Griffiths, Prentice-Hall (Upper Saddle River, New Jersey 1989). This is truly one of the best-written undergraduate physics texts around. Read it. Enjoy it.

Other E&M Texts:

The Theory of the Electromagnetic Field, by David M. Cook, Prentice-Hall (1975). A fine introductory E&M text written by a fine member of the Lawrence faculty. Out of print.

Electricity and Magnetism, by E.M. Purcell, McGraw-Hill (1985). This is the 2nd volume in the Berkeley Physics Course series. It is a commonly used introductory E&M text.

Electromagnetic Fields and Waves, by Lorrain, Corson, and Lorrain, W. H. Freeman and Company (1988). This text is an intermediate undergraduate text.

Classical Electrodynamics, by J. D. Jackson, John Wiley and Sons (1962). This is the standard graduate level E&M text. It is a classic, but treats the subject from a rather mathematical/abstract perspective.

The Feynman Lectures on Physics, volume II, by Feynman, Leighton, and Sands, Addison-Wesley (1964). The Feynman lectures are required reading for all serious physicists.

Grading policy:

Grades will be determined from the following components, weighted as indicated:

Midterm Exam I 20%

Midterm Exam II 20%

Final Exam 30%

Problem Sets 20%

Class Presentation, Attendance, Participation 10%

Exams:

There will be two closed book, one hour midterm exams, and a comprehensive three hour final exam.

Midterm Exam I is tentatively scheduled for Friday 26 April.

Midterm Exam II is tentatively scheduled for Monday 20 May.

The Final Exam is Wednesday 12 June at 1:30 PM.

Problem sets:

Problem sets will be assigned on a (roughly) weekly basis. Note the weighting of the problem sets toward the final grade. This reflects the importance attached to completing problem assignments. You are expected and encouraged to work together on the problem sets, but must write up your own solutions.

Presentations, Attendance and Participation:

This component of your grade reflects the importance of actively participating in the class. Attendance will not be taken explicitly, but you are expected to ask questions in class, respond to my questions, and show evidence of having read the textbook. Each student will also have the opportunity to present one or two problem solutions to the rest of the class some time during the term.

Outline of the Course:

I: Electrostatics

· Chapter 2: Electrostatics

· Chapter 3: Special Techniques

· Chapter 4: Electric Fields in Matter

II: Magnetostatics

· Chapter 5: Magnetostatics

· Chapter 6: Magnetic Fields in Matter

III. Electrodynamics

· Chapter 7: Electrodynamics

· Chapter 9: Electromagnetic Waves

Course Schedule

Unit I: Electrostatics

Week 1

Day 1 Monday 1 April

· Overview of the course

· The Laws of Electrostatics

Coulomb’s Law

The Principle of Superposition

· The electric field

· Continuous charge distributions

Day 2 Wednesday 3 April

Read Griffiths 2.1.1-2.2.1 (pp. 58-69). [and from chapter 1, Griffiths 1.1 (pp. 1-12)]

· Electric field lines

· Gauss' Law (integral form)

Day 3 Friday 5 April

Read Griffiths 2.2.2-2.2.3 (pp. 69-74) [and from chapter 1, Griffiths 1.2.1 1.2.4,1.3.1-1.3.4 (pp. 13-18, 24-33), especially the divergence and the divergence theorem]

· Applications of Gauss’ Law

· The divergence theorem

· Gauss’ Law (differential form)

Week 2

Day 4 Monday 8 April

Read Griffiths 2.2.4-2.3.4 (pp. 76-86)[and from chapter 1, Griffiths 1.2.5-1.2.7, 1.3.5-1.3.6 (pp. 19-24, 34-38)]

· Electric potential

· Stokes’ theorem and the curl of E

· Poisson’s equation

· Laplace’s equation

Day 5 Wednesday 10 April

Read Griffiths 2.3.5-2.5.4 (pp. 87-106) [and from chapter 1, Griffiths 1.4.1-1.4.2 (pp. 38-44)]

· Conductors

· Electrostatic boundary conditions

· Capacitance

· Electrostatic energy

Day 6 Friday 12 April

Problem presentation day

Week 3

Day 7 Monday 15 April

Read Griffiths 3.1.1-3.1.6, 3.3.1 (pp. 110-121, 127-136)

· Properties of solutions to Laplace’s equation

· Uniqueness theorems

· Separation of variables (Cartesian coordinates)

Day 8 Wednesday 17 April

Read Griffiths 3.3.2 (pp. 137-144)

· Separation of variables (spherical coordinates)

· Example: Conducting sphere in uniform E field

Day 9 Friday 19 April

Read Griffiths 3.4 (pp. 146-155)

· Electric dipole moment

· Electric multipole expansion

Week 4

Day 10 Monday 22 April

Read Griffiths 4.1 (pp. 160-166) [and from chapter 1, Griffiths 1.5 (pp. 45-51)]

· Numerical solutions to Laplace’s equation

Day 11 Wednesday 24 April

Read Griffiths 4.2.1-4.4.1 (pp. 166-184)

· Polarization

· Bound charges

· Electric displacement

· Linear dielectrics

· electric susceptibility/dielectric permittivity/dielectric constant

Day 12 Friday 26 April HOUR EXAM I

Week 5

Day 13 Monday 29 April

Read Griffiths 4.4.2-4.4.3 (pp. 186-193)

· Examples of problems with dielectrics

Unit II: Magnetostatics

Day 14 Wednesday 1 May

Read Griffiths 5.1-5.2 (pp. 202-219)

· The laws of magnetostatics

· Oersted’s observation

· Lorentz force

· Magnetic field

· Biot-Savart law

· Definition of the Ampere

Day 15 Friday 3 May

Read Griffiths 5.3.1-5.3.2 (pp. 221-224)

· Current density and the continuity equation

· Magnetic field lines

· Ampere’s Law

· Divergence of B

Week 6

Day 16 Monday 6 May

Read Griffiths 5.3.3-5.3.4 (pp. 225-233)

· Applications of Ampere’s law

Day 17 Wednesday 8 May

Read Griffiths 5.4 (pp. 234-246)[and from chapter 1, Griffiths 1.6 (pp. 52-54)]

· Magnetic vector potential

· Multipole expansion

· Magnetic dipole moment

· A little bit of quantum mechanics

No class on Friday 10 May: Midterm Reading Period

Week 7

Day 18 Monday 13 May

Catch-up / get-ahead / problem presentation day

Day 19 Wednesday 15 May

Read Griffiths 6.1-6.4 (pp. 255-282)

· Magnetization

· Paramagnetism, diamagnetism, ferromagnetism

· Bound currents

· The auxiliary field

Unit III: Electrodynamics

Day 20 Friday 17 May

Read Griffiths 7.1 (pp. 285-299)

· Example of a problem with magnetization

· Ohm’s law, resistivity and resistance

· Joule heating

· Electromotive force

Week 8

Day 21 Monday 20 May HOUR EXAM II

Day 22 Wednesday 22 May

Read Griffiths 7.2.1-7.2.2 (pp. 301-309)

· Motional emf

· Faraday’s law

· Applications of Faraday’s law

Day 23 Friday 24 May

Read Griffiths 7.2.3-7.2.4 (pp. 310-320)

· Inductance

· Magnetic energy

Week 9

No class on Monday 27 May: Memorial Day

Day 24 Wednesday 29 May

Read Griffiths 7.3 (pp. 321-333)

· Displacement current

· Maxwell’s equations

Day 25 Friday 31 May

Read Griffiths 9.1.1-9.2.2 (pp. 364-380)

· The wave equation

· Electromagnetic waves in vacuum

Week 10

Day 26 Monday 3 June

Read Griffiths 9.3.1 (pp. 382-384)

· Electromagnetic waves in dielectric media

· Index of refraction

· Radiation

Day 27 Wednesday 5 June

Catch-up / get-ahead / problem presentation day

Day 28 Friday 7 June

Review for Final Exam

Final Exam: Wednesday 12 June 1:30 PM

Some of the information contained in this syllabus can also be found at http://www.lawrence.edu/fac/stonekim/courses.htm