# Introductory Physics: Fields

PHY 272 (PHY 272 H)- Spring 2015

Instructor: Luis A. Orozco, Computer and Space Science Building, room 2201

Class hours: TuTh 12:30pm - 1:45pm, F 12:00 pm – 12:50 pm

Classroom: Physics 1410

Office hours: Monday 4:00 to 5:00 PM, Tuesday 11:00 to 12:00 AM

Textbook: "Electricity and Magnetism", E. Purcell & D. Morin, 3rd edition. The lectures will not follow the book closely and the book (either edition) is only recommended, not required. The level of mathematical sophistication required in this class is somewhat above what most students start the semester with. I will try to help you with multivariable and vector calculus during the semester and a good source for these topics is the free, online textbook "Mathematical Tools for Physics", by J. Nearing, that can be found here. Chapters 8, 9 and 13 are the relevant ones.

Grades: The grade will be based on frequent homework (10%), and three in-class exams (30% each).

Syllabus and objectives: The goal of this class is to introduce the concept of electromagnetic fields and the mathematics used in their description, understand the laws governing them (Maxwell's equations) and apply these laws to a large variety of situations arising in several branches of physics, astrophysics and technology. The specific topics covered and the level of sophistication will be comparable to Purcell's book but it's unlikely we will be able to cover all chapters, in which case we will skip most of electric oscillating current circuits (discussed in depth in PHY273), dielectrics and magnetic materials.

### Tentative Syllabus

Electrostatics

Charge and electric field

Gauss' law; flux

Electric potential; line integral; gradients, divergence and curl; divergence and Stokes theorem

Conductors

Magnetostatics

Currents and Ohm's law; energy dissipation

Ampere's law

Electromagnetic induction

Alternating current circuits

Maxwell's equations

Displacement current

Maxwell's equation in integral and differential form

Electromagnetic waves; energy transport

Electric and magnetic fields in matter

Electric dipoles, polarization and dielectrics

Magnetic dipoles, magnetization, ferromagnetics, paramagnetics and diamagnetics

Relativity

Origins of relativity and the relativistic invariance of Maxwell's equations

Some people like " Div, Grad, Curl, and All That: An Informal Text on Vector Calculus", Fourth Edition, H. M. Schey.

Make sure you play with the applet to find the field configurations generated by different charges distributions. It is the best way to get some intuition for the Coulomb law. There are other, better versions around the web. Let me know if you find a particularly good one.

Academic Integrity:  The University of Maryland, College Park has a nationally recognized Code
of Academic Integrity, administered by the Student Honor Council. This Code sets standards for