Chapter 24: Gauss' Law

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INTRODUCTION
PHYSICS 242/244 – University Physics II
Fall 2011
Instructor: Petru S. Fodor
E-mail: p.fodor@csuohio.edu
Class webpage:
https://bbce8.csuohio.edu/MACAuth/Login8Servlet
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Contact information
Instructor: Petru S. Fodor
Office: Science Building SI 115
Phone: (216) 523 7520
E-mail (BEST WAY TO GET IN TOUCH WITH ME): p.fodor@csuohio.edu
Office hours: - Monday 1:00 pm - 4:00 pm
- Wednesday 2 pm - 4:00 pm.
The best alternative is to send me an e-mail and set up an
appointment.
Lectures: Monday, Wednesday & Friday 9:45 – 10:50 am (Main classroom
MC 307B)
Laboratories: make sure you are attending the laboratory session for
which you are registered.
Blackboard class webpage can be found at:
https://bbce8.csuohio.edu/MACAuth/Login8Servlet
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Introduction
Textbook
 “Fundamentals of Physics”, vol. 2 – 9th edition, by D.
Halliday, R. Resnick and J. Walker.
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Chapters to be covered
 Electric Charge (Chapter 21)
 Electric Fields (Chapter 22)
 Gauss’s Law (Chapters 23)
 Electric Potential (Chapter 24)
 Capacitance (Chapter 25)
 Current and Resistance (Chapter 26)
 Electric circuits (Chapter 27)
 Magnetic Field (Chapter 28)
 Ampere’s Law (Chapter 29)
 Induction, Faraday’s – Lenz Law (Chapter 30)
 Electromagnetic Oscillations (Chapter 31)
 Maxwell’s Equations (Chapter 32)
 Electromagnetic Waves (Chapter 33)
 Geometric Optics (Chapter 34)
 Wave Optics: Interference (Chapter 35)
 Wave Optics: Diffraction (Chapter 36)
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Introduction
What will you learn?
 Apply Gauss’s and Coulomb law to solve electrostatics problems.
 Map the electric fields of a given charge distribution (continuous or
discrete).
 Calculate the capacitance of simple systems and that of networks of
capacitors.
 Analyze dc electric circuits in terms Kirchhoff’s and Ohm’s laws.
 Calculate the magnetic flux through given surfaces. Solve motion
problems for charge particles, loops, and other systems in magnetic
fields.
 Calculate the magnetic fields produced by different current distributions.
 Apply Faraday’s and Lenz’s laws to describe electromagnetic induction.
 Analyze voltage – current relations in simple RL, LC and RLC circuits.
 Understand electromagnetic waves propagation
 Trace light propagation through different materials and interfaces.
 Calculate interference and diffraction patterns.
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Introduction
Online resources
Blackboard CE6 Course Webpage:
https://bbce8.csuohio.edu/MACAuth/Login8Servlet
 After each lecture most of the lecture notes will be
posted online.
 Practice exams and solutions.
 Useful resources.
 Extra – credit assignments.
- Contact me if you have any problems accessing this website. Also please see
the attachment A of your syllabus for access instructions.
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Introduction
CSU ID
+
CSU Password
(same as CampusNet)
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Choose
class
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Introduction
Online resources (continued)
Wiley textbook support site + WileyPlus:
http://edugen.wileyplus.com/edugen/class/cls231327/
 The electronic copy of the full 9th edition (you can read,
download and print any of the material).
 The Student Companion study guide.
 The Student Solution Manual where some of the
homework problems are worked out.
 Access to the online assignment system WileyPlus.
PLEASE SEE Attachment B in your syllabus for detailed information on how
to get access to this website.
- Contact me or Prof. J. Walker (j.walker@csuohio.edu) if you have any
problems accessing this website.
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Homework assignments
 There will be 14 homework assignments in this class.
The quizzes are web-based using the WileyPlus
support site
 Typically, the homework will be made available every,
Thursday beginning with the first week and should be
submitted by the evening of the following Wednesday.
 You will lose points for late submission of the homework
assignments.
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Collaboration vs. copying
 It is in your best interest not to just copy your homework.
There will be nobody to copy from at the exams.
 Having said that you are encouraged to collaborate as much
as possible. Explaining to somebody something is the best
way to understand it.
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Quizzes
 There will be 15 quizzes in this class. The quizzes are
web-based using the WileyPlus support site.
 Typically, the quizzes will be made available every
Tuesday, and should be submitted by the evening of the
following Monday.
 Definitely no late acceptance of the quiz assignments.
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Examinations
 There will be three midterms and a final exam - similar
problems with the homework, quizzes, class problems
and sample exams - NOT IDENTICAL!!!! - But very close
 Close book-exams. Feel free to bring a 8.5 x 11 inches
sheet of paper with formulas. I will also supply you with
all the formulas that you need (and some that you don’t)
 The midterms are 1 hour while the final exam is 2 hours.
WORD OF ADVICE – Show all the work. Even if you
do not get the right answer, you will still get points if
your solving technique is correct.
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Laboratories
 You will attend a laboratory session every week in SI 148,
where you will do an experiment.
 During the first lab session you will be given the
laboratory session policy regarding attendance. If you
miss more labs than allowed by this policy you will
receive the grade F. In case you cannot make it to a
laboratory session please contact your teaching assistant
or the lab manager Tara Peppard (t.peppard@csuohio.edu)
(Phone: (216) 523 7584 or (216) 687 2076).
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Grading
Exam # 1
Exam # 2
Exam # 3
Final Exam
Homework (1% each)
Quizzes (0.5% each)
Laboratories
TOTAL:
GRADE Max. Points
11.5 %
115
11.5 %
115
11.5 %
115
24 %
240
14 %
140
7.5 %
75
20 %
200
100 %
1000
 Approximate number of points required for different grades (the
distribution might vary slightly from class to class)
Grades: A & A- (>900 points), B+ & B (>800 points), B-, C+ & C (>700 points)
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Extra-credit
 Optional but highly recommended
- Asses your progress in the class
- Can only improve your grade in the class (get points that
are used to boost your final grade).
 Sources:
- Extra – assignments posted online.
- Participation in the class (use Student Response
System).
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Student response system (SRS)
Answer choices
Rules of use
 Take your SRS at the beginning of the class.
 Please return remote after each class.
 Note: - do not press the GO button at any time. This might
change the channel on which your remote works, requiring
me to reset it after class.
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Introduction
Student response system (SRS)
Al Mateeq, Wael
#1
Alghamdi, Abdulaziz
#2
Arcangelini, Gregory
#3
Beargie, David
#4
Benmerzouga, Zakaria
#5
Brauer, Drake
#6
Buck, Robert
#7
Chaya, Michael
#8
Coleman, Marcus
#9
Dippong, Aaron
#10
DiRenzo, Anthony
#11
Feigenbaum, Joseph
#12
Khatib, Randy
#13
Kujawinski, Joshua
#14
Leutenberg, Nicholas
#15
Lopez-Oropeza, Adrian
#16
Lynch, Kyle
#17
Marshall, Robert
#18
McDonald, Michael
#19
Mishra, Tulsi
#20
Oryszak-Ley, Tristan
#21
Pistilli, Daniel
#22
Poss, Skye
#23
Rodesh, Kara
#24
Rosenbaum, Victor
#25
Rybak, Zachary
#26
Sadey, James
#27
Sakchuenyos, Thanaphun
#28
Scott, Douglas
#29
Shahin, Mohaned
#30
Warner, Holly
#31
Washington, Michael
#32
Wheaton, Nathan
#33
Woff, Rachel
#34
Wohlgemuth, Joshua
#35
Wright, Christian
#36
Yokoyama, Sam
#37
Zoldak, Patricia
#38
Guest
#39
Guest
#40
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Student response system test
What grade do you expect in this class?
1.
2.
3.
4.
5.
A
B
C
D
Do not care
92%
3%
1
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2
3%
3
0%
4
3%
5
Student response system test
What does the picture represent?
1.
2.
3.
4.
5.
94%
a TV remote
a garage opener
a zapper
a response polling remote
none of the above
6%
0%
1
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2
0%
3
0%
4
5
Student response system test
Your instructor declares that he wants to make your classroom
experience more friendly and engaging. How would you like him to
proceed?
1.
2.
3.
4.
bring donuts
do card tricks
use more discussions.
33%
challenge you individually to answer questions.
25%
25%
17%
1
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2
3
4
Important Dates
 Monday, September 5 –Labor Day – no class
 Friday, September 9 –Last day to drop the class
 Monday, September 26 – EXAM #1
 Monday, October 10 – Columbus Day – no class
 Monday, October 24 – EXAM #2
 Friday, November 4 – Last day to withdraw.
 Monday, October 21 – EXAM #3
 Friday, November 25 – Thanskgiving – no class
 Wednesday, December 14 – FINAL EXAM, 8:30 -10:30 am
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Final thoughts
 The material is more coherent than in
University Physics II
 More mathematics.
 An some new concepts like the notion of “field”.
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Introduction
Announcements for PHY 244 enrolled students
 Essay #1: at least 500 words about Laboratory #1 –”Coulomb’s
balance”. It is due on the 3rd week of the semester. This essay will be
graded as part of the corresponding lab report.
 Essay #2: at least 500 words about Laboratory #6 – ”Wheatstone
bridge” . It is due on the 8th week of the semester. This essay will be
graded as part of the corresponding lab report.
 Essay #3: about 2000 words long discussing the broader relevance of
the experiments done during the laboratory experience. The first draft of
this essay is due at the end of the 12th week of the semester.
 The grade for essay #3 will be used to calculate the point average grade
for the entire laboratory session ((average of 15 experiments) + WAC
essay).
 PHY 244 is a WAC class. Thus according to the WAC criteria, In order to
receive a C or better in the course, you must write at a satisfactory skill
level (C or better).
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Introduction
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