Genesee Community College - PHY 132 – 01 Physics With Calculus 2 (4 credits)
Spring 2016
SYLLABUS
INSTRUCTOR: Mike Crittenden, phone 343-0055 ext. 6397, e-mail macrittenden@genesee.edu (I
check email more often than voicemail. I might check email on weekends, but make no promises.)
OFFICE HOURS: MWF 9:00 – 10:00, Tu & Th 11:00 – 12:00
(Available at other times also. Feel free to walk into a lab.)
OFFICE: D369 (I may sometimes spend my office hours in the lab, B202).
INSTRUCTOR BIO/BACKGROUND INFORMATION: A.S Cayuga Community college, B.S.
University of Rochester, M.S. Syracuse University. Joined GCC faculty in 1981, full Professor since
1993, President of Academic Senate since 2003.
TEXT: Serway & Jewett, Physics for Scientists and Engineers With Modern Physics, 9th ed., “Hybrid
Edition” (Much less expensive older editions are organized a little differently, but otherwise just as good.)
CALCULATOR with trig functions: Also required.
Optional: Study guide. Shows how to solve many problems.
Anticipated Schedule:
W 1/20
F 1/22
M 1/25
W 1/27
F 1/29
M 2/1
W 2/3
F 2/5
M 2/8
W 2/10
F 2/12
M 2/15
W 2/17
F 2/19
M 2/22
W 2/24
lecture on sec. 1
more sec. 1/ lab 1
finish 1, start 2
quiz 1, lecture on sec. 2
more sec. 2/ lab 2 & 3
finish sec. 2/ start 3
quiz 2, more sec. 3
more sec. 3/ lab 2 & 3
finish sec. 3/ start 4
quiz 3, more sec. 4
more sec. 4/ lab 4
No class: Pres. Day
finish 4, start 5
q.4, review 1-4/ lab 5
Exam 1(sec 1-4)
more sec. 5
F 2/26 finish 5/ lab 6
M 4/11 finish 10
M 2/29 quiz 5, start 6
W 4/13 start 11
W 3/2 finish sec. 6/ start 7
F 4/15 quiz 10, more 11/ lab 11
F 3/4 start sec. 7/ lab 7
M 4/18 finish 11, start 12
M 3/7 quiz 6, more 7
W 4/20 more 12
W 3/9 more sec. 7
F 4/22 quiz 11, more 12/lab12
F 3/11 finish 7, start 8/ lab 8
M 4/25 finish 12, start 13
Spring Break: March 14-18
W 4/27 more 13
M 3/21 quiz 7, more 8
F 4/29 quiz 12, review9-12/no lab
W 3/23 finish 8
M 5/2 Exam 3 (sec 9-12)
F 3/25 No class: Good Friday W 5/4 more 13
M 3/28 start 9
F 5/6 finish 13, start 14/lab13
W 3/30 quiz 8, review sec 5-8 M 5/9 quiz 13, more 14/
F 4/1 Exam2 (sec5-8) / lab 9 W 5/11 finish 14
M 4/4 more 9
F 5/13 quiz 14/ review
W 4/6 finish 9, start 10
1:25 pm: Retests
F 4/8 quiz 9, more 10/ lab 10
Final Exam (sec 1-14): May 16, 17, or 18. The exact time will be announced when I know it.
(Students with accommodations are expected to take quizzes & exams the same day as everyone else.)
GRADING SYSTEM/COURSE REQUIREMENTS:
You must earn at least two thirds of the possible lab points or you will receive an F for the course,
regardless of your test scores. (This means you fail if you miss more than four labs.) Otherwise, and
assuming no deduction for dishonesty, your grade is determined as follows. (You can keep track of
your grades below. Keep graded papers in case you find an error in my records.)
-2Quizzes (10 pt each):___+___+___+___+___+___+___+___+___+___+___+___+___+___ = ____
Labs (10 pt each):___+___+___+___+___+___+___+___+___+___+___+___+___
= ____
Exams 1, 2 & 3 (100 pts each): _____ + _____ + _____
= ____
Final Exam (175 pts):
____
Total:
____
No grades are dropped, except when replaced by a retest. No extra credit.
A: 89% - 100% (663 - 745 points)
B: 78% - 89% (581 - 662)
C: 67% - 78% (499 - 580)
D: 56% - 67% (417 - 498)
F: 0 - 56% (0 - 416)
I might move the cuts between letter grades down a little (improving borderline grades) based on
effort and the difficulty the tests. If a lab or test has to be canceled, the same percents will apply to the
smaller number of possible points.
To estimate your grade before the course is over:
(1.88)(quiz total so far)/(number of quizzes so far) = ______
(1.75)(lab total so far)/(number of labs so far)
= ______
(.637)(exam total so far)/(number of exams so far) = ______
Total:
______%
(Some people vary a lot between exams, so early in the course, this estimate would be very crude.)
With nearly perfect lab grades, which most people have, roughly 50% is the minimum needed on
quizzes and exams to pass with a D. Low 60's for a C, mid 70's for a B, upper 80's for an A. (The idea
is that "B" means "above average;" about half of a typical class scores above 75% on a typical test.)
Other grades:
W: To withdraw, contact the records office by the ninth week. W's cannot be issued by faculty.
IP: Contact me by the day after the final. As with any time extension, you need a legitimate reason.
Retests:
I do not drop any grades; instead, you can take another test on the same material. The better of the
two grades counts. Making up a test you missed counts as a retest unless I agree otherwise.
You may take retake a maximum of five quizzes, within 1 week of the original, but not after the final
exam. You may take one of the 100 point exams over, on the date in the schedule above. A retest
gets "used up" even if it does not improve your grade. There are no retests on the final.
COURSE DESCRIPTION:
Catalog description: Introduces electric fields of discrete and continuous charges, Gauss's law,
potential, DC circuits, capacitance, magnetic fields, Ampere's law, induction, Maxwell's equations,
AC circuits, and thermodynamic processes and laws. Three class hours, three lab hours. Spring
-3only.
Prerequisites: PHY131 and MAT 142 (MAT 142 can be taken concurrently with PHY 132).
Student Learning Outcomes:
Upon successful completion of the course, students will be able to demonstrate
*1. The ability to explore natural phenomena using scientific methods, in the course's laboratory.
"Natural phenomena" means actual physical processes taking place live, as opposed to videos or
simulations. "Laboratory" means an appropriate facility containing necessary equipment, as
defined by the list included in the Course Outline. For a minimum of ten of the three-hour labs,
students must measure something real, in the presence of the instructor.
Students must submit lab reports worth at least two thirds of the possible lab points to receive
credit for the course.
*2. The ability to apply data, concepts, and models in the field of physics, as documented by
performance on quizzes, exams and the comprehensive departmental final. These tests contain both
conceptual questions and quantitative problems, with the emphasis on quantitative problems.
Partial credit will be given based on how closely a student's solution resembles a correct one. The
following will be demonstrated:
a. fluency in the course's prerequisite mathematics.
b. the ability to interpret graphs.
c. consistent use of units.
d. the ability to apply the meaning of terminology verbally.
e. the ability to apply the meaning of terminology in solving problems.
f. the ability to apply basic physical principles verbally.
g. the ability to apply basic physical principles in solving problems.
h. the ability to do the above in the context of a variety of topics, as listed in the course's content
outline.
3. Critical thinking (reasoning) ability as documented by solving exam problems which are not
identical to others they have seen before, and whose solution involves two or more steps. This
includes
a. problems in which one equation must be used to find something needed in another. These
equations may be algebraic, involve trigonometric or logarithmic functions, or involve calculus.
b. problems involving the manipulation of vectors in a plane or in three dimensions.
c. problems which involve setting up an integral.
They must show, in written form, how they have done this; that is, present a well-reasoned
argument for their answer.
* This course objective has been identified as a student learning outcome that must be formally assessed as part of the
Comprehensive Assessment Plan of the college. All faculty teaching this course must collect the required data and
submit the required analysis and documentation at the conclusion of the semester to the Office of Institutional
Research and Assessment.
-4RULES & POLICIES:
Attendance is only monitored so I can report it to others, not for any purpose of my own. (I’m here to
judge how good you are at physics, not to be your mother. Keep in mind that people who don't come
to class often get low grades because they don't learn much.)
Missing a quiz or exam: If possible, contact me on or before the day of the test. You will probably
need to document the fact that missing the test was beyond your control. (Paperwork from your
medical treatment, the receipt for your car’s repairs or parts, the police report … ) If you’re sick for a
quiz but not sick enough to see a doctor, just take the retest. If this happens for a big test, discuss it
with me. If it’s a day or two after the test, you will need to explain why you couldn’t contact me
sooner. I try to be reasonable; however, the final judgment as to what is reasonable is mine, and I may
reject any undocumented excuse. If I do, the zero can be raised by a retest the same as any other
grade. Don’t miss the Final without a good reason.
Missed or late labs: Labs are due when you leave the laboratory; get written permission to finish one
at home. I do not accept late papers without a reason; "I forgot to bring it" will work a few times.
Make a missed lab up within one week of the scheduled date, unless you have a documented hardship.
Behavior: If I feel you are unacceptably offensive or distracting, I may deny you permission to be in
class for however long seems appropriate to me. This includes possible expulsion from the course,
with zeros on all remaining work. I've never had to do this; let's keep it that way. For more
information on behavior, put “student code of conduct” in the search box at genesee.edu.
Plagiarism and Cheating: Cheating is obtaining or intentionally giving unauthorized information to
create an unfair advantage in an examination, assignment, or classroom situation. Plagiarism is the
act of presenting and claiming words, ideas, data, programming code or creations of others as one’s
own. Plagiarism may be intentional – as in a false claim of authorship – or unintentional – as in a
failure to document information sources using MLA (Modern Language Association), APA
(American Psychological Association) or other style sheets or manuals adopted by instructors at the
College. Presenting ideas in the exact or near exact wording as found in source material constitutes
plagiarism, as does patching together paraphrased statements without in-text citation. Disciplinary
action may include a failing grade on an assignment or test, a failing grade for the course, suspension
or expulsion from the college, as described in the Code of Conduct.
A first offense will result in a course grade reduction of one letter. (If you cheat on an exam, the
average of the other two exams will be used as the grade for that exam. If you cheat on a quiz, the
average of the other quizzes will be used as its grade. If you cheat on a lab (fabricate or copy data for
a lab you did not participate in), the average of the other labs will be used as its grade. After that, 83
points = 11% will be subtracted from your grade for the course.) I will notify the Dean of Students,
which will lead to more severe penalties if you have a previous history of dishonesty. A second
offense, meaning you previously cheated in any course at GCC, will result in a course grade of F.
Punctuality: If you are late for a quiz or exam, your paper will be collected when everyone else's is,
unless you offer a reasonable explanation. If you arrive over 15 minutes after the class has started a
lab, you will have to make it up, within one week.
-5Storm cancellation policy: If the college is open, I will almost certainly hold class. Use your
judgment as to whether you come. If driving seems unsafe to you, don't. I consider a storm to be a
legitimate excuse like being sick.
TIPS ON STUDYING & WHAT TO EXPECT FROM THE COURSE:
In class: Take good notes. A lot of this material will not stick to you the first time you hear it. You
need something to refer to as you do the homework. If following the lectures is hard, do the reading
before I go over it so you have an idea of what I’m talking about.
At home each week: It’s more important to practice solving problems than to read the text over and
over. Work on the homework until you can put the solutions on blank paper, just like during the quiz.
Once you can do it at home, you can do the exact same thing in class. (Unless you have some issues
with test taking. Go to the CAP center for help in that case.) If you need more practice than just the
homework, go over the sample problems from the notes and text: cover up the solutions, try them,
then compare. There are also many worked out problems in the study guide.
For the monthly exams (and final): Cramming a month of material into your head in one night isn't
going to work. But, if you've been preparing properly each week, you may only need to refresh your
memory by reading back through your notes. If there are areas where you do not feel confident,
practice by solving problems. Doing new ones is better than the same old ones over again.
This is a fairly demanding course that needs to be taken seriously. Expect to follow the 2 to 1 rule
(two hours outside of class per credit, meaning 8 hours per week for this course). If you aren’t willing
to do the necessary work, others sitting near you are, and they will be the ones getting what you had in
mind for yourself. So make up your mind to come to class, do the homework and study. Don’t be
intimidated: Most people have the ability to succeed. It’s just a matter of time and effort. You don't
get good at a sport or a musical instrument without practicing; the same is true here. And who knows?
You may even discover that the mathematical description of nature can be an interesting subject.
SUPPORT SERVICES: If you need any sort of help, please ask me for it; repeatedly if necessary. A
tutor is usually available. Ask me or at the C.A.P. to find out.
For information on other kinds of support such as testing services, disabilities support, internet
access, help desk, financial, transfer or career services, or contact information for GCC people or
offices, see genesee.edu
NEED A JOB? If you, or someone you know, want minimum - wage work in the science labs, there are
sometimes unfilled positions for student assistants. See me to find out.
-6Homework (Quiz Questions):
Solutions are on file at the library's circulation desk, and at
http://faculty.genesee.edu/macrittenden/phy132.htm
Avoid using them as a crutch; try to do it yourself first. If you don't spend two or three hours on an
assignment before deciding you need help, you're not making a serious attempt. Then, to find your
mistakes or resolve any questions, consult the solutions or see me.
I quiz you on homework rather than collecting it; the weekly quizzes are homework questions with the
numbers changed. Exams are not.
Sec. 1 - Electric & Gravitational Fields
Read: Ch. 13: example 13.1 on p. 308; Ch. 23: Sec. 1 - 4, 6 & 7.
Quiz A: Four point charges are at the corners of a square of side a as
shown. In terms of a and q, what is the electric field vector, ⃑ , acting
on the 5q charge?
2
ans: (1/4πε0)(q/a )(3.06 iˆ + 5.06 ĵ )
B. A point charge of -5.20 μC is located at the origin. Find the electric field vector
(a) on the y axis at y = -4.00 m,
(b) at the point (2.00 m, 2.00 m).
3
3
ans: 2.92 x 10 ĵ V/m, 5.84 x 10 V/m at 225
C. Three point charges are located at the corners of an equilateral triangle, as
shown. Calculate the net electric force on the 7.00 μC charge. (Give the force
vector, in iˆ , ĵ notation.)
ans: .755 iˆ - .436 ĵ N
D. A charged cork of mass 1.00 g is suspended on a light string in a
5
uniform electric field as shown. When ⃑ = (3.00 iˆ + 5.00 ĵ )x10 N/C, the
ball is in equilibrium at θ = 37. Find (a) the charge on the ball, and (b) the
tension in the string.
ans: 10.9 nC, 5.43 mN
E. 1. (2 points) A free electron and a free proton are placed in identical electric fields.
a. Which feels the larger force, or are they equal?
-7b. Which has the greater acceleration, or are they equal?
2. (8) Two charges are located on the x axis: -4 μC at the origin, +9 μC at x = 1.00 m. Where on the x
axis, other than x = ± infinity, does the electric field equal zero?
ans: x = -2.00 m
F. 1. (2 points) Draw an arrow indicating the approximate direction of the
electric field vector at the origin.
2. (3) Two protons in a molecule are separated by a distance of 3.80 x 10
exerted by one proton on the other?
ans: 1.59 nN away
-10
m. How large is the force
3. (5). An electron is placed in the uniform electric field between two charged parallel plates. To give the
16
2
electron an acceleration of 1.8 x 10 m/s , what should the strength of the field, E, be?
5
ans: 1.02 x 10 N/C
Sec 2 - Potential Energy & Electric Potential
Read: Ch. 13: sec. 5; Ch. 25: Sec. 1 – 3
A: 1. (3 pts) ⃑ is uniform throughout this region.
a. Is potential difference (VA - VB) more, less, or equal to (VA - VC)?
b. Is potential difference (VA - VB) more, less, or equal to (VB - VC)?
c. Which point(s) is(are) at the highest potential?
2. (7) Calculate the speed of a proton that is accelerated from rest through a potential difference of 120 V.
ans: 152 km/s
B. 1. (4 points) A system consists of three particles, each of mass 5.00 kg, located at the corners of an
equilateral triangle with sides of 3.00 m. Calculate the potential energy of the system.
-9
ans: -1.67 x 10 J
2. (6) The three charges are at the vertices of an isosceles triangle.
Calculate the electric potential at the midpoint of the base.
ans: -110 kV
-8C. 1. (1 point) A proton and an electron are in empty space, far
from any other sources of electric fields. Which is at the
higher potential?
2. (9) The parallel plates are 1.5 m apart and the origin is
halfway between them. A power supply maintains 500 V
-8
between the plates. The 1.7 x 10 C charge is 40 cm from the
origin. What is the electric field vector at the origin?
ans: 666 iˆ - 167 ĵ V/m
D. 1. (1 point) A test charge is located at a certain point in an electric field. If the
charge of this test charge is doubled, with no change in the field it was placed in,
what happens to the electric potential (the "voltage") of the point?
2. (9) A uniform electric field of magnitude 325 V/m is directed in the negative y
direction as shown. Calculate the potential difference VB -VA using (a) the solid
line path, (b) the dotted line path.
ans: 260 V, 260 V
E. 1. (2 points) A uniform electric field is parallel to the x axis. In what direction can a charge be
displaced in this field without any external work being done on the charge?
3
2. (8) The electric field along the x axis (due to a small dipole at the origin) is given by ⃑ = (170/x ) iˆ
V/m. Find the potential difference between the points at x = 3 m and x = 4 m. (That is, V3 - V4.)
ans: 4.13 V
F. 1. (4 pts) a. Is the electric potential zero or nonzero halfway between a proton and an electron?
b. Is the electric potential zero or nonzero halfway between two protons?
c. Is the electric field vector zero or nonzero halfway between a proton and an electron?
d. Is the electric field vector zero or nonzero halfway between two protons?
2. (6) In SI units, the electric field a distance r from a certain charged wire is E = 700/r, pointing away
from the wire.
a. What is the potential difference between a point 2.00 m away and a point 3.00 m away, V2 - V3?
b. How much potential energy would a proton gain moving between these points?
ans: 284 V, 4.55 x 10-17J
Sec. 3 - Gauss's Law.
Read: Ch. 24, all.
-9A. 1. (3 points) a. A charge Q is uniformly distributed on the surface of a
balloon. Air is let out, shrinking the balloon. Point P, outside the balloon, is
a fixed distance from its center, so it gets farther from its surface. What
happens to the electric field strength at point P?
b. A charge Q is uniformly distributed on the surface of a balloon. Air is let
out, shrinking the balloon. Point P, outside the balloon, is a fixed distance
from its surface, so it gets closer to its center. What happens to the electric
field strength at point P?
2. (7) A wire 3.0 m long has 12 μC uniformly distributed along its length.
Imagine a 20 cm radius sphere with this wire passing through its center, as
shown.
a. How much charge does the sphere contain?
b. How much flux passes through the sphere?
5
ans: 1.60 μC, 1.81 x 10 V·m
-12
B. 1. (2 points) Each of the three charges shown is 8.854 x 10 C. In V·m,
(a) What is the net flux through surface A? (b) What is the flux through B?
(c) through C? (d) D?
2. (8) The uniform electric field in this region has a magnitude of 1100
V/m. Its direction is parallel to the xy plane, 30° above the x axis.
Each side of the box is 20 cm long.
a. Find the flux through the box’s (i) left side, (ii) right side, (iii)
top, (iv) bottom, (v) front, (vi) back.
b. Find the net charge inside the box.
ans: -38.1, 38.1, 22.0, -22.0, 0, 0 all in V·m; q = 0
C. A slab of insulating material runs to plus and minus infinity in all directions in
the yz plane. Its surfaces are at x = a and x = -a. This slab has a uniform positive
charge density, ρ. Find the magnitude of the electric field inside the slab, at a
point a distance x from its center. Your answer should be in terms of ρ, x and
fundamental constants. Show a complete solution; that is,
a. Indicate exactly what you are using for a gaussian surface.
b. Give an expression for the flux through each part of the surface.
c. Show all substitutions you make into Gauss’s law and how you solve it for E.
ans: ρx/ε0
-10-
D. Field inside a charged cylinder: An infinitely long cylinder has a radius R and a uniform charge
density, ρ. (ρ is a positive constant.) Find the magnitude of the electric field a distance r from the
cylinder's axis if r < R. Your answer should be in terms of ρ, R, r and fundamental constants. Show a
complete solution; that is,
a. Indicate exactly what you are using for a gaussian surface.
b. Give an expression for the flux through each part of the surface.
c. Show all substitutions you make into Gauss’s law and how you solve it for E.
ans: ρr/(2ε0)
E. Field outside a charged cylinder: An infinitely long cylinder has a radius R and a uniform charge
density, ρ. (ρ is a positive constant.) Find the magnitude of the electric field a distance r from the
cylinder's axis if r > R. Your answer should be in terms of ρ, R, r and fundamental constants. Show a
complete solution. ; that is,
a. Indicate exactly what you are using for a gaussian surface.
b. Give an expression for the flux through each part of the surface.
c. Show all substitutions you make into Gauss’s law and how you solve it for E.
2
ans: ρR /(2ε0r)
F. 1. (2 points) A spherical gaussian surface surrounds a point charge, q. What happens to the flux
through the surface if (a) the charge is tripled? (b) the volume of the sphere is doubled? (c) the shape of
the surface is changed to that of a cube? (d) the charge is moved to another position inside the surface?
2. (8) Background information: Under static conditions (only), E = 0 inside a conductor. The question: A
long wire is centered in a long hole through a block of metal. The wire has a charge per unit length of λ =
+15.0 nC/m. If the hole has a 1.00 cm radius, what is σ, the charge per unit area on the hole’s inside
surface (except near the ends)? Clearly indicate whether σ is positive or negative.
ans: -.239 μC/m2
Sec. 4 - Capacitors. Current & Resistance. Series & Parallel Circuits.
Read: Ch. 26, sec. 1 – 3; Ch. 27, sec. 1 & 2; Ch. 28 sec. 2.
12
A. 1. (3 points) 3.00 x 10 electrons cross a given cross section of a
conductor each second. Calculate the current.
ans: 481 nA
2. (7) Find the equivalent capacitance between points a and b.
ans: 12.9 μF
B. 1. (2 pts) I showed in class that the drift velocity of electrons through a metal is very slow. Why, then,
doesn't it take several hours for a light to come on after you throw the switch?
-112. (8) An electric current is given by the expression I(t) = 100 sin(120πt), where I is in amperes and t is in
seconds. What is the total charge carried by the current from t = 0 to t = 1/240 s?
ans: .265 C
C. 1. (2 pts) Two capacitors in series are connected to a battery. They have different capacitances; call the
larger one C1. (C1 > C2.)
a. Compare their charges. (Q1 > Q2? Q1 = Q2? Q1 < Q2?)
b. Compare their voltages. (V1 > V2? V1 = V2? V1 < V2?)
2. (8) An electron beam has a circular cross-section of radius 1.00 mm. (a) If the beam current is 8.00 μA,
what is the current density of the beam, assuming it is uniform throughout? (b) The speed of the electrons
8
is so close to the speed of light that their speed can be taken as 3.00 x 10 m/s. Find the electron density in
the beam.
2
10 -3
ans: 2.55 A/m , 5.31 x 10 m
D. 1. (1.5 points) If you double the voltage between the plates of a capacitor, what effect does it have on
the capacitance?
2. (1.5 pts) Points A and B are between oppositely charged parallel plates. At A, 10 cm from the negative
plate, E = 5000 V/m. What is E at B, 5 cm from the negative plate?
3. (7) What is the equivalent resistance between points a and b?
ans: 6.0 Ω
E. 1. (2 points) What is the difference between resistance and resistivity?
2. (8) The quantity of charge, in coulombs, passing through a surface of area 2.00 cm2 varies with time
3
according to q = 4.00 t + 5.00t + 6.00, where t is in seconds. (a) What is the instantaneous current
through the surface at t = 1.00 s? (b) What is the magnitude of the current density at this time?
ans: 17.0 A, 85.0 kA/m2
F. 1. (5 pts) Two conductors having charges of +10.0 μC and -10.0 μC have a potential difference of 10.0
V. Determine
a. the capacitance of the system, and
b. the potential difference between the conductors if the charges
are increased to +100 μC and -100 μC.
ans: 1.00 μF, 100 V
2. (5) A .900 V potential difference is maintained across a 1.50 m length of tungsten wire that has a cross
sectional area of .600 mm2. What is the current in the wire?
ans: 6.43 A
Sections 5 - 14 will be handed out later. They are available now at
-12http://faculty.genesee.edu/macrittenden/phy132.htm