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Electricity and Magnetism

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Electricity and Magnetism. Physics 208. Dr. Tatiana Erukhimova. Dr. Tatiana Erukhimova. [year]. Atmospheric Thermodynamics Elementary Physics and Chemistry Gerald R. North Tatiana L. Erukhimova Texas A & M University. SLATE award: 2008, 2009, 2011 - PowerPoint PPT Presentation

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Page 1: Electricity and Magnetism
Page 2: Electricity and Magnetism

Dr. Tatiana Erukhimova

[year]

Page 3: Electricity and Magnetism

Atmospheric Thermodynamics

Elementary Physics and Chemistry

Gerald R. North

Tatiana L. Erukhimova

Texas A & M University

SLATE award: 2008, 2009, 2011 Recipient of 2012 Distinguished Achievement University-Level Award in Teaching

2009 AFS College-Level in Teaching

Recipient of 2013 John E. Trott, Jr. Award in Student Recruiting

Page 4: Electricity and Magnetism

Can you make a light bulb work with a battery and a wire?

“Minds of Our Own” by Dr. Matthew H. Schneps and Dr. Philip M. Sadler

Harvard-Smithsonian

Page 5: Electricity and Magnetism

Make your own MOTOR!

All you need is a battery, a nail, a small magnet, and a wire (foil works better)

http://en.wikipedia.org/wiki/Homopolar_motor

Page 6: Electricity and Magnetism

Overview of Today’s Class

•Syllabus and Course requirements

•Tricks to survive

•Mechanics Review and Coulomb’s Law

Page 7: Electricity and Magnetism

Syllabus

Instructor Dr. Tatiana Erukhimova

Homepage http://faculty.physics.tamu.edu/etanya/P208/

Office: Mitchell Physics bldg (MPHY), Room 308

Page 8: Electricity and Magnetism

Phone: 845-5644 E-mail: [email protected]

Class times: MWF: 9:10 am to 10:00 am Sections 521-525

Location: MPHY 205

Office hours:Monday, Wednesday, Thursday 1:30pm – 3pm or by appointment

Page 9: Electricity and Magnetism

There will be recitation and lab this week!You have to attend both!

Read Physics 208 WebAssign Instructions at http://people.physics.tamu.edu/etanya/P208/P208.htm

Page 10: Electricity and Magnetism

Textbook: “Don’t Panic: Volume II”, by William H. Bassichis, 5th Edition

Dedicated

students like it!

Page 11: Electricity and Magnetism

Clickers

We will use i>clickers for various kinds of assessment: pop quizzes, homework quizzes, in class discussion, etc. You will need to buy i>clicker2 and register it for this class at www.iclicker.com

Page 12: Electricity and Magnetism

Grade Policy

Exams 50% Lab 5%

Quizzes 5% Final 40%

Page 13: Electricity and Magnetism

You must pass both the lecture (3 midterm exams, final exam, homework) and laboratory parts of the coursein order to pass the course

Grade Policy (cont)

Page 14: Electricity and Magnetism

•If your grade on the Final Exam is higher than your lowest grade on one of the three exams during the semester, the grade on the Final will replace that one lowest exam grade in computing the course grade (it will only replace one grade in case of two exams having the same lowest grade). •The Final Exam grade cannot be used to replace an exam that has been missed without an University excused absence. The missed exam will count as a zero when computing your final grade.

Grade Policy (cont)

Page 15: Electricity and Magnetism

All Exams are

•Closed book

•No numbers! In general the problems will be formula solutions with variables

•Problems will be similar to those on homework and recitation

Page 16: Electricity and Magnetism

Homework

You’ll have weekly homework assignments

Every week you’ll have hw quiz with one problem from your assignment.

All quizzes will be given with i>clickers

Page 17: Electricity and Magnetism

Check my webpage for hw assignments

Example for Week 1 (Week Jan 13):

Week Jan 13 (due Jan 20): All Chapter 1 problems and exercises

“Due” means that I’ll give you a hw quiz on that day

Page 18: Electricity and Magnetism

Exam schedule

All mid-term exams will be from 7:00 to 9:30 pm

February 11             Exam I March 18             Exam II April 15               Exam III

Final             May 5

Page 19: Electricity and Magnetism

My Advice to You• Be proactive!! Get into it and have fun• Always watch the chapter outline video and read

the book before you come to class• Be serious about an old rule of thumb: you have to

study 2-3 hours a week outside the class per each credit hour

• Don’t miss classes (lectures, recitations, labs)• Solve all problems and exercises after each Chapter

in the book• Don’t fall into the “I understand the concepts but I

can’t do the problems” trap. It means you haven’t done enough of the problems in the chapters.

• Every year we have lots of students who really think they understand but fail during the exams. Don’t let this happen to you!

Page 20: Electricity and Magnetism

I make help sessions before each midterm exam and the final. (and Monday? Week in review)

However, these sessions cannot substitute for regular class attendance.  They are to give you a good guidance on how to prepare for the test and to succeed in problem solving.

Please check my webpage for help sessions schedule

Page 21: Electricity and Magnetism

W =r F total •

r r 1

r r 2

∫ dr r =

mV final2

2−

mVinitial2

2

22

2222

11

22

11

initialfinalyx

yx

totaly

yx

yx

totalx

mVmVdyFdxFW

veconservatinonveconservati WWW

A little bit of MechanicsA couple of very important concepts:

____

Page 22: Electricity and Magnetism

y

UF

x

UF yx

;

veconservatiW does NOT depend on path!

)]()([ 12 rUrUW veconservati

2)(

2)(

21

1

22

2

mVrU

mVrUW veconservatinon

22)]()([

21

22

12

mVmVWrUrU

WWW

veconservatinon

veconservatinonveconservati

Page 23: Electricity and Magnetism

2)(

2)(

21

1

22

2

mVrU

mVrUW veconservatinon

2)(

2)(

,02

11

22

2

mVrU

mVrU

WIf veconservatinon

Mechanical energy is conserved!

Page 24: Electricity and Magnetism
Page 25: Electricity and Magnetism
Page 26: Electricity and Magnetism

We can find Gravitational Potential Energy

rg ir

mmGF

2

21

i

ri

rF

Constr

mmGdr

r

mmGrU 21

221)(

0)( ConstU

r

rUF

r

rUFr

),(;

),(

r

mmGrU 21)(

Page 27: Electricity and Magnetism

Consider now a different type of a force…..

Page 28: Electricity and Magnetism

From long view of the history of mankind – seen from, say, ten thousand years from now – there can be little doubt that the most significant event of the 19th century will be judged as Maxwell’s discovery of the laws of electrodynamics. The American Civil War will pale into provincial insignificance in comparison with this important scientific event of the samedecade.

Richard P. Feynman

Nobel Prize in Physics, 1965

1918-1988

Page 29: Electricity and Magnetism

Have a great day!

Hw: All Chapter 1 problems and exercisesReading: Chapter 1