Physics 1B������������ Spring 2012
�Course Information

The only constant is change.� You must check the class web site before each class for changes: http://physics.ucsd.edu, on the left, choose �Quick Links/Course Web Pages�, or http://physics.ucsd.edu/students/courses/spring2012/physics1b.

Updated 6/22/2012 9:42:45 ��������������� Section 744401

Announcements

The Reuben H. Fleet Space Theater and Science Museum has a new, hands-on electric exhibit in the first room inside the entrance.� It�s fun to see and play with.

Someone may have lent a calculator to another student at the final exam, and left without collecting the calculator.� I have it.� Please let me know if it�s yours.

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Please do NOT ask me to change your grade.� Grades are calculated, not negotiated.� To be fair to everyone, the spreadsheet calculates grades.� Final grades are already submitted, and can only be changed in the event of clerical error.� Final grades are posted under �General Information,� and should be available on your academic record in two days.

I updated the electricity slides with an electric circuit model of the heart (p 58), also reproduced here: ElectricHeart.pdf

Thank you all for all the good wishes, and for a great quarter.

Updated study idea #2:� Review each slide, and say out loud what its main concept is.� Every slide is there for a reason.

Let me know if any of the study or problem solving ideas have been useful.� Send me your methods that have worked for you

Updated �How to solve any problem� on Electricity slides: if you�re stuck on step 6, go back to #3 and add more things.

Study idea #1: Go over every formula on the formula sheet (start with the ones you already have).� For each formula, draw a diagram illustrating it, and describe in words every symbol in it.� For example, for delta-V = IR, draw a resistor with + on one end, and - on the other.� Draw current from + to -.� delta-V is the voltage across the resistor.� I is the current through it.� R is its resistance in ohms.

General Information

Final grades are posted here.� You should check all your grades as they are posted.� You must notify me of any grade questions within 1 week of their posting.����������� class.pdf

1B_grades.pdf

Podcasts available: http://Podcast.ucsd.edu

 

Instructor

Dr. Eric L. Michelsen���
emichels at physics etc.
Office: SERF-317

Office hours:���� Wednesdays, 12:30-2:30 in SERF-317

Teaching Assistant

Pengfei�� Chen�
pec008 at physics etc.

Office hours: Wed 4-6pm, SERF-329

Text

Serway & Jewett, Physics I Vol 2 (UCSD Custom Text+solutions), Volume 2, 4 Edition

 

Course coordinator

 

 

Lecture times

MWF 11-11:50

York 2622

Problem Session

Thursdays, 7-9pm,������
Center Hall 216

 

Quizzes

On selected Fridays

 

Final Exam

Confirm with schedule of classes.� As of 5/3: 06/15/2012 Fr 11:30a - 2:29p, York 2622

Location TBA

Physics Department Tutorial Center

Sunday-Thursday from 3-8 pm

2702 Mayer Hall Addition

Check the Schedule of Classes for updates.

Cool Websites

Get a feel for the size of the everything:� http://primaxstudio.com/stuff/scale_of_universe/� (Thanks to a Winter-2011 student.)

Electric Field Hockey game:� http://phet.colorado.edu/en/simulation/electric-hockey

My Funky Physics tutorials: ����� http://physics.ucsd.edu/~emichels/ .

Thank you to Dr. Sutterly for her help in preparing this class.

Course Description

From the catalog: Second quarter of a three-quarter introductory physics course geared toward life-science majors. Electric fields, magnetic fields, DC and AC circuitry.

Week

Tentative Schedule of Topics

Quiz dates are firm,
topics may vary

4/2

Chapter 19: Electric Forces and Electric Fields.� HW Ques 2, 5, 8, 9 Prob 3, 5, 13, 21.� New: 25, 27, 31, 49, 59

 

4/9

 

4/13: Quiz 1

4/16

Chapter 20: Electric Potential and Capacitance

HW: Chap 19 Ques 15, Prob 32, 65

HW: Chap 20 Ques 3, 4, 11, 12 Prob 1, 5

 

4/23

Final Ch 20:� Prob 29, 35, 48, 50

4/27: Quiz 2

4/30

Chapter 21: Current and DC Circuits

HW: Chap 21 Ques 3, 7, 13, 15. Prob 1, 5, 17, 23, 25, 30, 31, 45(a)

 

5/7

 

5/11: Quiz 3

5/14

Chapter 22: Magnetic Forces and Magnetic Fields

HW: Chap 22: Q1, 5, 9, 11.� P 1, 9, 13, 17, 21, 25, 33, 35, 37, 39, 45.� Not 57.

 

5/21

 

5/25: Quiz 4

5/28

Chapter 23: Faraday�s Law and Inductance

HW: Q 1-6, 8, 9.� P 1, 3, 6, 12, 13, 21.� P25 is withdrawn.

 

6/4

 

6/8: Quiz 5

6/11

 

6/15: Final Exam: Student ID required

We want you to succeed.� As part of that, we expect you to read ahead of the class, and start the homework even as it is being discussed in class.� I don't cover every topic in class; some I leave to the book.� I encourage questions in class, but if you want more individual questions answered, I also recommend going to the office hours, discussion/problem sessions, and the Physics Tutorial Center.

Prerequisites

Physics 1A, and calculus.� There will be some calculus.

Problem Sessions

There is a weekly �Problem Session,� hosted by the TA.� The topics are driven by student questions during the session.� This is a chance for you to get answers to your questions.� After working on the homework, please come with good questions.� You should ask, �I tried doing the problem this way, and ran into a roadblock.� Can you help me through it?�� Or, �What concept do I use to get started on this problem?�� (You should not ask, �How do I do this problem?�)

iClickers

The classroom response system is used to stimulate discussion and thought throughout the lectures.� You must bring your iClicker to every class.� Responses are a small part of your grade, though credit will be given for any overall effort judged significant.�

The point is thinking, not necessarily getting right answers the first time.�

Please think for yourself, as that will improve your grade on other materials much more than letting others think for you.� Don�t bother searching the book for the �right� answer; that only hurts you.� Instead, think for yourself.

Registering your iClicker:� You must register your iClicker online every quarter to get credit.� Register at http://iclicker.com/registration/ .� Use your full 9-character student ID, starting with �A�, and the full 8-digit clicker ID, including any leading zeros.

You can share an iClicker with someone in a different class, but not with someone in the same class.� More answers at:�����������
�http://iclicker.com/dnn/SupportCenter/FAQs/tabid/179/Default.aspx

iClicker scores count the days where a student answered 75% of the questions.� This will be enough for full credit.� Extra credit will be determined by overall class performance (essentially, curved).

Homework

The purpose of homework is to help learning.�
To understand the material, you must practice solving problems.�

Problems will be assigned roughly weekly.� Class discussion provide conceptual understanding for the numerical calculations.� HW is essential for numerical practice; class discussion alone is insufficient for passing the exams.

The first step in solving a problem is often the most difficult, so it is very important for you to start work on your own.� Consult your solutions only as a check, or if you are stuck.� Studying in groups may be valuable, but can not completely replace working on your own.� Problems given on the quizzes will often resemble the homework problems.� The textbook contains numerous worked sample problems, and a number of problems and questions at the end of the chapter.

Learning physics is about understanding why a solution works,
rather than just getting the correct numbers.�
Blindly plugging numbers into formulas is useless.

Quizzes

You must bring your Scantron form, and two soft pencils with you to quizzes, and know your Student ID.� Fill out your student ID ahead of time.� Please do not fold your Scantron sheet.

There may be reading quizzes done with iClickers on any day after reading is assigned.

There are 5 closed-book quizzes, given on the schedule above.� No note-sheets are allowed.� You must know some basic equations (e.g., F = ma); any equations beyond those will be given.� I will post ahead of time the formulas that will be given on the quiz.� Quiz scores and correct answers will be posted on the web.� Your overall quiz grade will be computed from your best 4 of the 5 quizzes; one quiz can therefore be missed without penalty.

The purpose of dropping one quiz is to accommodate one unavoidable conflict for medical, academic, athletic, or other reasons.� The purpose is not to improve your grade.

The quizzes are multiple choice. You must provide your own Scantron form (form # X-1018640PAR-L) and #2 (soft) pencil.� They are available at the bookstore and the general co-op store.� I recommend you fill in your 9-digit Student ID (use �1� for �A�) and quiz code before coming to class.

Final Exam

Your student I.D. is required to take the final exam.

The final will be just a big quiz: a closed-book exam, with no note sheets, and uniformly cover the whole course.� It will be multiple choice problems, just like the quizzes.� As always, you should bring a Scantron form (same as quizzes) with you, and a calculator (but not a laptop or phone).� You may wish to bring some blank scratch paper as well.� There will be approximately 30 questions.

Course Grade

The final grade weighting will be determined when all the scores are in, as part of the overall grading process.� Ranges are:

Classroom response = 5%, plus up to 5% extra credit for above-average contribution

Quizzes (best 4 of 5) = 65%

Final Exam = 30%

Academic Integrity

Every honest student benefits from maintaining high academic integrity.� Please read �UCSD Policy on Integrity of Scholarship� in the UCSD General Catalog, http://www.ucsd.edu/catalog/front/AcadRegu.html.� These rules will be rigorously enforced.� Any confirmed case of cheating will result in an �F� grade in this course, and referral to the dean for disciplinary action.� Cheating includes submitting another person�s work as your own; copying from another student on homework, or exams; knowingly allowing another student to copy from you; use of unauthorized materials during a quiz or exam; or any attempt to obtain a higher grade by means other than honest effort.� Cheating also includes attempts to manipulate grades unfairly; and intentionally misusing code numbers.

Course Notes

Announcements_1B.pdf����������� Prerequisites_1B.pdf���

Electricity_1B.pdf�������������������� Magnetism_1B.pdf

�����������������������

Sol_Chap_19.pdf

The book�s solution to HW 19.49 is correct (but I don�t like it), and gives the same answer as what we did in class with a �thin� sheet.� A full analysis and comparison is here: ����� Sol_Chap_19.49.pdf

Sol_Chap_20.pdf

Sol_Chap_21.pdf

 

Quiz1_formulas_v2.pdf Quiz 1 scores�� quiz1_solutions.pdf

Quiz2_formulas.pdf����� quiz2_solutions.pdf������ Quiz2_scores.pdf

Version 3: Quiz3_formulas.pdf� quiz3_solutions.pdf������ quiz3_scores.pdf

 

The book�s solution to P22.13 approximates the angle of deflection, measuring it from the �middle� of the magnetic field region.� This is a very reasonable approximation, but makes the use of 3 significant digits in the calculation unrealistic; 2 digits is fine.

Sol_Chap_22.pdf�������� B_from_wire.pdf

Quiz4_formulas.pdf����� quiz4_solutions.pdf������ quiz4_scores.pdf

 

Sol_Chap_23.pdf�������� Note that Problem 25 is withdrawn: you don�t need to know the electric field from a changing B-field for this course.

MRI.pdf���������� For your enjoyment.� MRI is not part of the course.

 

quiz5_formulas.pdf������ quiz5_solutions.pdf������ quiz5.pdf

 

final_formulas.pdf�������� final_solutions.pdf�������� final_scores.pdf