Physics 23


Electricity and Magnetism



Spring Term, 1999

Lecture: 9:50-11:00 MWF, Youngchild 90

Professor: Matthew R. Stoneking

Office Hours: Mon. & Wed. 2:30 - 4:30


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 12 and Mathematics 21.

Text:

Introduction to Electrodynamics, Second Edition, by David. J. Griffiths, Prentice Hall (Upper Saddle River, New Jersey, 1989).

Other E&M Texts:

Electricity and Magnetism, 2nd Edition, 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, 3rd Edition, by Lorrain, Corson, and Lorrain, W. H. Freeman and Company (1988).
This text is an intermediate undergraduate text. An older edition is on the shelf in Y-88.

Classical Electrodynamics, 2nd Edition, by J. D. Jackson, John Wiley and Sons (1975).
This is the standard graduate level E&M text. It is a classic, but treats the subject very abstractly.

Grades

Final grades will be based on the following weighted components:

Exams

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

Problem sets

Problem sets will be assigned on a (roughly) weekly basis. Note the heavy 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.

Weekly Homework Assignments

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


Course Schedule

Unit I: Electrostatics

Week 1
Day 1		Monday 29 March
	Overview of the course
	The Laws of Electrostatics
	Coulomb's Law
	The Principle of Superposition
	The electric field

Day 2		Wednesday 31 March
Read Griffiths 2.1.1-2.2.1 (pp. 58-69).
[Also begin reading chapter 1, Griffiths 1.1 (pp. 1-12)]
	Electric field lines
	Gauss' Law (integral form)

Day 3 	Friday 2 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]
	Continuous charge distributions
	The divergence theorem
	Gauss' Law (differential form)
	Applications of Gauss' Law

Week 2
Day 4 	Monday 5 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)]
	Applications of Gauss' law (continued)
	Electric potential
	Stokes' theorem and the curl of E
	Poisson's equation
	Laplace's equation

Day 5 	Wednesday 7 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 9 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)
Week 3
Day 7 	Monday 12 April
Read Griffiths 3.3.2 (pp. 137-144)
	Separation of variables (spherical coordinates)
	Example: Conducting sphere in uniform E field

Day 8 	Wednesday 14 April
Read Griffiths 3.4 (pp. 146-155)
	Multipole expansion

Day 9		Friday 16 April
Catch-up / get-ahead / problem presentation day

Week 4
Day 10 	Monday 19 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 21 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 23 April	HOUR EXAM I

Unit II: Magnetostatics


Week 5
Day 13 	Monday 26 April
Read Griffiths 4.4.2-4.4.3 (pp. 186-193)
	Examples of problems with dielectrics

Day 14 	Wednesday 28 April
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 30 April
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 3 May
Read Griffiths 5.3.3-5.3.4 (pp. 225-233)
	Applications of Ampere's law

Day 17 	Wednesday 5 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

Day 18	Friday 7 May
Catch-up / get-ahead / problem presentation day

Week 7
Day 19 	Monday 10 May
Read Griffiths 6.1-6.4 (pp. 255-282)
	Magnetization
	Paramagnetism, diamagnetism, ferromagnetism
	Bound currents
	The auxiliary field

Unit III: Electrodynamics


Day 20 	Wednesday 12 May
Read Griffiths 7.1 (pp. 285-299) 
	Example of a problem with magnetization
	Ohm's law, resistivity and resistance
	Joule heating
	Electromotive force

Day 21 	Friday 14 May
Read Griffiths 7.2.1-7.2.2 (pp. 301-309)
	Motional emf
	Faraday's law
	Applications of Faraday's law

Week 8
Day 22 	Monday 17 May	 HOUR EXAM II

Day 23 	Wednesday 19 May
Read Griffiths 7.2.3-7.2.4 (pp. 310-320)
	Inductance
	Magnetic energy

Day 24 	Friday 21 May
Read Griffiths 7.3 (pp. 321-333)
	Displacement current
	Maxwell's equations

Week 9
Day 25 	Monday 24 May
Read Griffiths 9.1.1-9.2.2
	The wave equation
	Electromagnetic waves in vacuum

Day 26 	Wednesday 26 May
Read Griffiths 9.3.1
	Electromagnetic waves in dielectric media
	Index of refraction
	Radiation

Day 27	Friday 28 May
Catch-up / get-ahead / problem presentation day

Week 10
Day 28 	Wednesday 2 June
Catch-up / get-ahead / problem presentation day

Day 29 	Friday 4 June
Review for Final Exam

Final Exam: Monday 7 June 8:30 am