ECE 311: Electric and Magnetic Fields Course Introduction .../uploads/01_Intro_to_ECE311… · grading Bermel ECE 311-Spring 2019 400 total course points In-class quizzes (extra credit,

ECE 311: Electric and Magnetic FieldsCourse Introduction for Spring 2019

Professor Peter BermelElectrical and Computer Engineering

Purdue University, West Lafayette, IN [email protected]

1/7/2019

electrostatics

� Fixed electric charges create electric fields

� First discovered by ancient Greeks

� Demonstration: static cling

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magnetostatics

� Constantly moving electric charges (currents) create magnetic fields

� Discovered by Ørsted and Ampère in early 19th century

� Demonstration: solenoid

1/7/2019 Bermel ECE 311-Spring 2019

André-Marie Ampere

3

electromagnetism

� Changing magnetic fields also move electric charges

� Discovered by Faraday in 1831

� Thus, electricity and magnetism are two facets of a single phenomenon, electromagnetism


Michael Faraday, FRS

4

electromagnetic waves

� Maxwell realized that prior descriptions were missing the effect of changing electric fields on magnetic fields

� This interplay gives rise to electromagnetic waves


James Clerk Maxwell

5


� Electromagnetic waves travel through space at exactly the speed of light – defined to be 299,792,458 m/s.

� A key prediction of Maxwell’s theory


Time-varying electric and magnetic fields regenerate one another to propagate through space

6


� A wide range of phenomena involve electromagnetic waves

� Basis of sunlight, wireless communications, astronomy, medical imaging, and more...


Electromagnetic spectrum

7

vector algebra

� Scalars: a quantity measured by a real number

� Vectors: a quantity with magnitude and direction (in 1 or more dimensions)

� Unit vectors: vectors with a magnitude of 1

� Fields: a function of vectors that vary over one or more independent variables (like space and time)


vector algebra

� Example: A = a x + 2a y + 2a z

� What is its component along z?

� What is its magnitude?


vector algebra

� Example: A = a x + 2a y + 2a z ; B = a x - 2a z

� What is the difference of the two vectors?

� What is their dot product?

� What is their cross product?

� What is the scalar and vector components of Aalong B?


course outline

Part 1: Electrostatics: 5 weeksPart 2: Magnetostatics 4 weeksPart 3: Wave propagation 4 weeksPart 4: Transmission lines 2 weeks

Bermel ECE 311-Spring 2019

Course objectives: To provide an overview of Maxwell’s equations, which describe an incredibly wide range of phenomena.

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course objectives

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

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

iii. An ability to work with time-varying fields, including wave propagation.

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

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course text


Elements of Electromagnetics, 5th Edition (EE)Matthew Sadiku, Oxford University Press (2010).

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grading


400 total course points

In-class quizzes (extra credit, maximum of 50 points)

Homework (assigned 1 week in advance. Maximum 80 points)Reflection exercises every Monday (maximum of 20 points)

Total score: The sum of the highest 3 of exams 1-4 plus your HW plus your quiz total. You must take Exam 5, or it counts as a zero in your average.

Letter grade: Will divide total score by 400, and assign letter grades on a 10-point scale

4 exams (3 in class + “final”, maximum of 100 points each)

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frequent exams


1) Multiple choice (5 questions) 40 points

2) Problem 1 (usually 30 points)

3) Problem 2 (usually 30 points)

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frequent exams

Bermel ECE 311-Spring 20191/7/2019 16

getting help

Instructor Office Hours: MWF, 3:20-4:20 pm, EE 332

TA (Levi Davies, [email protected]). Office Hours held in EE 209. Times TBA.

Help from Piazza: http://piazza.com/purdue/spring2019/ece311


course web page


https://nanohub.org/groups/ece311

All course information is posted on the class home page

Class announcements will supersede prior written information and will be posted on the course homepage

Campus Emergency Policies: 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. Information about changes will be posted on the course web page and available from [email protected]

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To report an emergency, call 911. To obtain updates regarding an ongoing emergency, sign

up for Purdue Alert text messages, view www.purdue.edu/ea.

There are nearly 300 Emergency Telephones outdoors across campus and in parking garages that connect directly to the PUPD. If you feel threatened or need help, push the button and you will be connected immediately.

If we hear a fire alarm during class we will immediately suspend class, evacuate the building, and proceed outdoors. Do not use the elevator.

If we are notified during class of a Shelter in Place requirement for a tornado warning, we will suspend class and shelter.

If we are notified during class of a Shelter in Place requirement for a hazardous materials release, or a civil disturbance, including a shooting or other use of weapons, we will suspend class and shelter in the classroom, shutting the door and turning off the lights.

Please review the Emergency Preparedness website for additional information. http://www.purdue.edu/ehps/emergency_preparedness/index.html

EMERGENCY PREPAREDNESS


cheating

It’s wrong. I have a zero tolerance policy. Any case of cheating will earn you an F in the course and a report to the Dean of Students.

------------------------- Exam Integrity Statement -------------------------

If I am caught cheating on this exam, I will earn an F for the course and be

reported to the Dean of Students.Write out the above statement:

Signature: ______________________________________________



Google Official: on “ideal recruits”

"There is no single set of discrete skills one can learn that will last an entire career in high-tech," Johnson writes. Instead, "ideal recruits are creative, adaptable and autonomous, and they have achieved a deep understanding of core subjects such as math, physics and computer science that make it possible to have a razor-sharp intuition and an ability to assimilate new subjects and technologies quickly, without even the expectation of being trained; they train themselves on the skills du jour as the need arises and with minimum help or structure.”

Bruce Johnson, the Atlanta site and engineering director for Google, in the Atlanta Journal-Constitution (12/23/11).

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How to study


1) Do the assigned reading before class

2) Attend class and pay attention

3) Review the lecture after class

4) Do the HW without looking at the solutions

5) Review and understand the solutions

6) Be sure you understand the quizzes

7) Ask questions

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ECE Honors


Consider signing an “Honors contract” for ECE 311

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you’re in training

“I hated every minute of training, but I said, 'Don't quit. Suffer now and live the rest of your life as a champion.’”-Muhammad Ali

http://www.brainyquote.com/quotes/quotes/m/muhammadal148629.html.

Bermel ECE 311-Spring 20191/7/201924

Muhammad Ali’s advice

"Stay in College, get the knowledge, stay there until you are through. If they can make penicillin out of moldy bread, they can sure make something of you!”-Muhammad Ali

http://www.brainyquote.com/quotes/quotes/m/muhammadal148629.html.

Bermel ECE 311-Spring 20191/7/201925

summary

� We’re going to learn the fundamental principles behind electrical & magnetic fields!

� The course will be taught with clear, detailed notes, frequent in-class activities, weekly homework assignments utilizing online tools, and five exams (four in-class, and one during finals week)

� The majority of course points (300) will come from exams; however homework (80) and reflection exercises (20) will be needed to get above a C

� Questions can be addressed through course website, Piazza, TA, or professor office hours


ECE 311


Work hard, have fun, learn something you can use for the rest of your career.

Get started now!

https://nanohub.org/groups/ece311

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Documents

ECE 311: Electric and Magnetic Fields Course Introduction .../uploads/01_Intro_to_ECE311… · grading Bermel ECE 311-Spring 2019 400 total course points In-class quizzes (extra credit,