# Phys 401, Electromagnetism I (Fall 2022)

## Course info

Accessing lectures and homeworks will be through Google Classroom. If you are in this course and do not have access to the virtual classroom, email Leo ASAP!

## Text

• Main text: Introduction to Electrodynamics, David Griffiths. We will be covering chapters 7-12.
• The definitive reference, at a higher level, is Jackson’s Classical Electrodynamics.

## Course goals and learning outcome

This is the first half of a standard course on electromagnetism in the undergraduate curriculum for physics.

Key concepts (time permitting): • vector calculus • curvilinear coordinates • electric field and potential • work and energy in electrostatics • Laplace’s equation, separation of variables, multipole expansions • electric fields in media • Lorentz force, magnetostatics • magnetic vector potential • magnetic fields in media.

Goals: Understanding of electrostatics, magnetostatics, and matter in static fields; relevance to physical systems; strengthen tools of vector calculus; applying multivariate and vector calculus and special mathematical tools (e.g. multipole/Legendre expansion). These goals are to enhance students’ mathematical reasoning, critical thinking, and analytical reasoning.

## Evaluation

• Grade ranges: (subject to change)
• A 88% and up
• B 75–87%
• C 65–74%
• D 55–64%
• F <55%
• Grade breakdown: (subject to change)
• 50% Homework
• 20% Midterm
• 30% Final

## Homework, tests, and final exam

Homework assignments will be announced via the course web site, and they must be turned in by midnight on the due date. Late homework will be penalized 20% per day (exceptions and extensions permitted with good cause). Homeworks and exams can be submitted in person, or electronically as PDFs or JPGs via the course web site (electronic submission is preferred). Homework must be easy to read: please clearly write down your name and the problem set number, do not use a red pen. The midterm and final exam will be open-book and open-notes, and a calculator will be permitted.

## Attendance

There is no strict attendance requirement, but you are strongly advised to attend class. Attendance has a strong correlation with performance. I recommend that you read the book sections in advance and come ready to participate. If you miss an exam or cannot turn in homework, please inform me beforehand and get a doctor’s note if applicable. Absences from tests count as zeros, unless they are justified. If you must be absent during a test for a University sponsored event, you must discuss this with me before the test date.

Violations of the University’s policy of academic integrity will result in a failing grade and other disciplinary actions. A student with a documented case of plagiarism or cheating in this course will receive a failing grade for the course and may face disciplinary action by the University, including expulsion.

In particular, do not turn in problem set solutions copied from online or a solutions manual. Copying solutions does nothing to enhance your learning. If I see this then you will get an automatic 0 for the problem set. It if happens more than once I will report it to the chair of the department.

## Other

If a change in the syllabus becomes necessary during the semester, it will be discussed in class and then posted on the course website. The course website will also contain up-to-date information on the class schedule, homework assignments and complementary material.

## Schedule (subject to change)

Day Month Date Topic
M Aug 22 1.1, syllabus, vector algebra
W Aug 24 1.1, vector algebra
F Aug 26 1.2, differential calculus
M Aug 29 1.3, integral calculus
W Aug 31 1.4, curvilinear coordinates
F Sep 02 1.5, Dirac $\delta$ “function”
M Sep 05 Labor day holiday
W Sep 07 1.6, vector field theory
F Sep 09 2.1, $\boldsymbol{E}$ field
M Sep 12 2.2, div and curl of $\boldsymbol{E}$
W Sep 14 2.2, div and curl of $\boldsymbol{E}$
F Sep 16 2.3, electric potential
M Sep 19 2.3, electric potential
W Sep 21 2.4, work and energy
F Sep 23 2.4, work and energy
M Sep 26 2.5, conductors
W Sep 28 2.5, conductors
F Sep 30 3.1, Laplace’s Equation
M Oct 03 3.1, Laplace’s Equation
W Oct 05 3.2, image charges
F Oct 07 3.3, separation of variables
M Oct 10 3.3, separation of variables
W Oct 12 3.4, multipole expansion
F Oct 14 3.4, multipole expansion
M Oct 17 4.1, polarization
W Oct 19 4.1, polarization
F Oct 21 4.2, field of a polarized object
M Oct 24 4.3, $\boldsymbol{D}$ field
W Oct 26 4.4, linear dielectrics
F Oct 28 4.4, linear dielectrics
M Oct 31 5.1, Lorentz force
W Nov 02 5.1, Lorentz force
F Nov 04 5.2, Biot-Savart law
M Nov 07 5.2, Biot-Savart law
W Nov 09 5.3, div and curl of $\boldsymbol{B}$
F Nov 11 5.3, div and curl of $\boldsymbol{B}$
M Nov 14 5.4, magnetic potential $\boldsymbol{A}$
W Nov 16 5.4, magnetic potential $\boldsymbol{A}$
F Nov 18 6.1, magnetization
Nov 19–27 Thanksgiving holiday
M Nov 28 6.2, field of a magnetized object
W Dec 01 6.3, the auxiliary field $\boldsymbol{H}$
F Dec 02 6.4, (non-)linear media
Dec 05–09 Final exams