ECE 311: Electrical and Magnetic Fields

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Created: 04 Jan 2019
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Overview

About the Group

Public Description

ECE 311: Electrical and Magnetic Fields
Spring 2019: MWF 2:30-3:20 pm in MSEE B012

 

Instructor:   Peter Bermel <pbermel@purdue.edu>

 

Office Hours: In EE 332 when our class meets: 3:20-4:30 pm MWF (or email for another time)

Teaching Assistant: Levi Davies <davies18@purdue.edu>

TA Office Hours: Mondays & Wednesdays, 10 am - 12 pm in EE 209.

In addition to office hours, students are encouraged to make use of the following online resources:

Announcements (5/1/19):

The primary course textbook is the Elements of Electromagnetics (Fifth Edition) by Matthew Sadiku. The secondary textbook is Schaum’s Outline of Electromagnetics by Joseph Edminister.


Course Description:

This course aims to provide an overview of Maxwell’s equations, which describe an incredibly wide range of phenomena encountered in both familiar and unexpected contexts. Following the history of the field, we will begin by describing the interaction of electrical charges via electric fields, known as electrostatics. Next, we will describe the interaction of current loops via magnetic fields, known as magnetostatics. Finally, we will show how these two types of fields can generate one another, giving rise to electromagnetic wave phenomena, such as wireless communication and lighting.

 

Lecture Format:

Students are expected to read assigned material prior to class. Most class sessions will include a short iClicker-based quiz. Class periods will otherwise be devoted to providing an overview of the assigned reading topics, and providing an opportunity for relevant discussions.

Class Schedule:

We will meet Mondays, Wednesdays, and Fridays at 2:30 pm in MSEE B012. Our first class will be on Monday, January 7, 2019, and our last will be on Friday, April 26, 2019. The exceptions will be the following dates: January 21 (Martin Luther King Day) and March 11-18 (Spring Break).

 

Grading:

Your course grade will be based on a total of 300 points from exams, 20 points from the reflection assignments, and 80 points from the homework. Up to 50 extra points can also be earned from in-class iClicker quizzes and attendance. Your course grade will be calculated by dividing your total by 400, and assigning letter grades on a 10-point scale.

Each exam will be worth 100 points, and your lowest grade will be dropped. However, if you miss an exam without a valid reason, it will be averaged into your final grade as a zero. If exam averages are lower than the target average, they will be curved at the discretion of the instructor.

 

Exam Schedule:  For exams you will be assigned a seat in class.

                        Exam 1 (solution)            Friday, February 1, 2019

                        Exam 2                            Wednesday, February 27, 2019

                        Exam 3                            Wednesday, March 27, 2019

                        Final                                Friday, May 3, 2019 (8 am in ME 1061)

 

Exams are closed book, but a formula sheet will be provided.  You should bring a calculator to each exam.  Following ECE policy, your calculator must be a Texas Instruments TI-30X IIS scientific calculator.

Exam Study Material

Exam 1:

Exam 2:

Exam 3:

Final Exam:

Make-up Exam Policy:

There will be NO written make-up tests. If you have a good excuse for missing a test, you will either be given an oral exam, or your missed exam will be dropped without penalty.

 

Homework:

Homework will count for a maximum of 80 points. Homework assignments will be due according to the following schedule:

Homework solutions are posted on Blackboard.

Late homework will not be accepted. Please write your solutions legibly and in an organized manner so that the graders can follow your work easily, and where possible, draw a box around your final answer.

 

You may work together as you solve your homework problems, as this can be an effective means of learning the material. If you do work in a group, be sure that the solution you turn in is your own work. This is the only way to learn the material. You will receive reduced or zero credit for homework submissions which appear to be copies of each other.

 

Reflection Exercise:

You will submit, by each Monday (January 14 – April 22), a brief written review on Blackboard of what you learned in class during the previous week. Mention any connections you see between the material covered and topics you saw in other courses. Indicate if there were topics where you are having difficulty and any questions you have. Each submission will count for 2 points. With 15 weeks in the semester, you can acquire the maximum of 20 points within ten weeks. I am not looking for length, especially since I will be reading these!

 

Academic Dishonesty:

Any case of academic dishonesty will result in a grade of F in this course.

 

Campus Closing/Disruption of Classes:

In the event of a major campus emergency, course requirements, deadlines and grading percentages are subject to changes that may be necessitated by a revised semester calendar or other circumstances. In such an event, information will be posted on the course webpage or emailed to you by the instructor.

 

Class Attendance:

Your class attendance is important. If you must miss class, you are responsible for any material, information, handouts, announcements, etc. you missed.  If you are not in class and have someone else sign the attendence sheet for you, you will both receive an F for the class. Attending class is the only way to earn extra credit for attendance and in-class quizzes.

 

Videos:

I will post about 50 short videos to Blackboard Learn during the semester. These will be arranged in three folders.

 

The folder “Demonstrations/Experiments” will show an experiment and explanation of a fundamental concept. I will show some of these demonstrations/experiments in class, but some I may only provide via these videos.

 

The folder “Lecture Items” will summarize something we covered in class that I feel is extremely critical for you to understand.

 

The folder “Interesting Concepts” will be items of interest, but not something that will be specifically covered on an exam.

 

 

Course Learning Objectives:  A student who successfully fulfills the course requirements will have demonstrated:

 

  1. An ability to work with electrostatic fields and to find electric and potential fields from charge distributions, even in the presence of dielectric materials. In particular:

 

1a. To understand the relationship between charge, electric field, and electric flux.

1b. To use Gauss’ Law and Coulomb’s Law to find electric fields and potentials for situations involving charge distributions.

1c. To define potential difference and to be able to find potential differences from charge configurations or the electric field intensity.

1d. To define the concept of divergence and to be able to find the charge density from the electric flux density.

1e. To calculate the energy stored in a collection of point charges or electric fields.

1f. To analyze electric boundary conditions between two dielectrics.

1g. To use Poisson’s equation to find potentials and electric fields.

1h. To determine the capacitance of simple geometries.

 

  1. An ability to work with magnetostatic fields and to find magnetic fields from current distributions, even in the presence of magnetic materials. In particular:

 

2a. To be able to use the Biot-Savart Law and Ampere’s Circuital Law to find magnetic fields from current distributions.

2b. To be able to find the forces and torques on moving charges and current carrying wires in magnetic fields.

2c. To understand the concept of curl and to be able to find the current density from the magnetic field intensity.

2d. To understand the difference between paramagnetic, diamagnetic, and ferromagnetic materials.

2e. To be able to analyze magnetic boundary conditions between two materials.

2f. To be able to determine the inductance of simple geometries.

 

  1. An ability to work with time-varying fields, including wave propagation. In particular:

 

3a. To calculate the displacement current caused by a changing electric field.

3b. To calculate the electromotive force caused by a changing magnetic flux.

3c. To define, and know how to represent, a propagating wave.

3d. To represent electromagnetic waves in lossless and lossy materials.

3e. To understand Poynting’s vector and power flow.

3f. To analyze electromagnetic plane waves normally incident on the boundaries between two materials.

 

  1. An ability to work with transmission lines in the time and frequency domains;

 

 

 

Course Outline

 

Week

Topics

 

    Sadiku

Schaum’s

 

 

 

 

 

1

Vector analysis, Coordinate systems, Differential length, volume, and area, Coulomb's law,  Electric field intensity (E)

Lecture 1 - Introduction

Lecture 2 - Coordinate systems

Lecture 3 - Differential volumes

 

Chapter 1 & 2

3.1, 3.2, 4.1, 4.2

Chapter 2

3.1, 3.2, 3.3, 3.4

 

 

 

 

 

2

Electric Field Intensity continued, Electric flux density, Gauss' law, Divergence

Lecture 4- Coulomb's Law

Lecture 5-Gauss' Law

Lecture 6-Gauss' Law 2

 

4.3, 4.4, 4.5, 3.4,

3.6, 4.6

3.5, 3.6, 4.1, 4.2, 4.3, 4.4, 4.5, 5.3,  5.5, 5.6, 5.7, 5.8, 5.9

 

 

 

 

 

3

Electric Potential, Gradient, Electric Dipole, Energy density in electrostatic fields

Lecture 7 - Electric Potential

Lecture 8 - Electric Energy

 

 4.7, 4.8, 3.5, 4.9,

4.10

Chapter 6, 5.2

 

 

 

 

 

4

Current, conductors and dielectrics in static electric fields, boundary conditions

Lecture 9 - Conductors

 

Chapter 5

7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 8.1, 8.7

5

Poisson’s and Laplace’s equations, Laplacian

Lecture 10 - Dielectrics

Lecture 11 - Boundaries

Lecture 12 - Capacitance

 

6.1, 6.2, 3.8, 6.3,

6.4

Chapter 9

 

 

 

 

 

6

Resistance and capacitance, method of images, Biot-Savart Law, Magnetic field intensity (H)

Lecture 13 - Magnetostatics

Lecture 14 - Ampere's Law

Lecture 15 - Magnetic Force

 

6.5. 6.6,  7.1, 7.2

7.7, 8.2, 8.3, 8.4, 8.5, 8.6, 10.1, 10.2

 

 

 

 

 

7

Ampere's Circuital Law, Curl, Stokes Theorem, magnetic flux density (B).

Lecture 16 - Magnetic Materials

Lecture 17 - Inductance

Lecture 18 - Faraday's Law

 

7.3, 7.4, 3.7, 7.5,

7.6

10.3, 10.4, 5.10, 10.10, 10.5

 

 

 

 

 

8

scalar and vector magnetic potentials, forces and torque

Exam 2 Review

Lecture 19 - Displacement Current

 

7.7, 8.1, 8.2, 8.3

Chapter 11

 

 

 

 

 

9

magnetic dipole, Magnetic materials

Lecture 20 - Dynamics Problems

Lecture 21 - Maxwell's Equations

Lecture 22 - Wave Equations

 

8.4, 8.5, 8.6

 

10

boundary conditions, inductance, energy

Lecture 23 - Wave propagation

Lecture 24 - Lossy wave propagation

Lecture 25 - Reflection and transmission

 

8.7, 8.8, 8.9

10.6, 10.7, 10.8, 12.1, 12.2

 

 

 

 

 

11

Faraday’s law, Displacement current, Maxwell's Equations, Phasors

Lecture 26 - Telegraph equation

 

9.1–9.5, 9.7

12.3, 13.3, 13.4, 13.5, 13.6, 13.7, 13.8

12

Wave equation, waves, wave propagation

Lecture 27 - Transmission lines

Lecture 28 - Reflection in transmission lines

Lecture 29 - Applications of transmission lines

 

10.1–10.5

14.1, 14.2, 14.3, 14.4

 

 

 

 

 

13

Wave propagation, power and Poynting vector

Lecture 30 - Waveguides

Lecture 31 - Waveguide Problems

Lecture 32 - Waveguide Applications

 

10.6, 10.7

14.5, 14.6, 14.7

 

 

 

 

 

14

Reflection of plane waves

Lecture 33 - Waveguide Power Applications

Lecture 34 - Waveguide resonators

Lecture 35 - Waveguide conclusions

 

10.8

14.8

15

Transmission lines

Lecture 36 - Review for Final Exam

Lecture 37 - Review for Final Exam 2

Lecture 38 - Problems for Final Exam 

 

11.1–11.4

Chapter 15

Please come to class on-time!

Class announcements may supersede prior written information