Ph 214, Spring 2007
Exam #3
08 May 2007
DO NOT OPEN THIS EXAM BEFORE YOU ARE TOLD TO BEGIN
.
A. Complete this:
Name
Please check the circle next to your recitation section:
circlecopyrt
C, Prof Uglesich, Wed 23pm
circlecopyrt
M, Prof Debroy, Wed 121pm
circlecopyrt
E, Prof Debroy, Wed 11amnoon
circlecopyrt
S, Prof Nu˜nez, Tue 34pm
circlecopyrt
K, Prof Nu˜nez, Tue 45pm
B. Read this:
1.
This is a closed book, closed notes exam. No collaboration. You may not use a calculator. Wireless devices,
cellphones, computers and PDAs are forbidden in the room. If you have brought any of these items with you,
they must be handed over to a proctor for the duration of the exam. Once you begin the exam you may not leave
the room. This exam will end promptly at 1 PM EDT.
Violation of these rules constitute academic dishonesty
and your exam will be confiscated.
2.
Once you are told to begin, write your name at the top of
each exam page.
Only pages with a name at
the top will receive credit.
3.
There are
20 questions
total on the exam: seventeen (17) multiple choice and three (3) true/false.
You
are expected to complete
all
20 questions worth a total of
100 pts
(the point value for each question is clearly
indicated).
4.
Write your answers in the space provided. If you need more space, come up and get extra blank problem
sheets.
Do not write on the back of any page.
We will ignore anything written there.
Use the blue books
for scratch paper. You must turn them in at the end of the exam but nothing written in them will be graded.
5.
For the multiple choice and true/false questions, you must transfer your answers to the boxes
on the first
page of each section.
If your answer is not transferred, you will not receive a score for that question.
For true/false questions, if you answer false, you must provide an explanation or counterexample.
6.
It is important that your work be
legible
and that your reasoning be
clear
and
easy to follow
. To receive full
credit for a problem, you must demonstrate that you understand the physics involved. Writing down the correct
final mathematical expression or numerical answer without providing an explanation is not sufficient.
#
Score (out of)
MC Sub
/85
TF Sub
/15
Total
i
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Ph 214, Spring 2007
Exam #3
08 May 2007
.
USEFUL FORMULAE
.
Maxwell’s Equations
Differential
Integral
vector
∇·
vector
E
=
ρ
ǫ
0
contintegraldisplay
S
vector
E
·
d
vector
A
=
1
ǫ
0
integraldisplay
ρdV
vector
∇·
vector
B
= 0
contintegraldisplay
S
vector
B
·
d
vector
A
= 0
vector
∇×
vector
E
=
−
∂
vector
B
∂t
contintegraldisplay
C
vector
E
·
d
vector
l
=
−
∂
Φ
B
∂t
vector
∇×
vector
B
=
μ
0
vector
J
+
ǫ
0
μ
0
∂
vector
E
∂t
contintegraldisplay
C
vector
B
·
d
vector
l
=
μ
0
I
enc
+
ǫ
0
μ
0
∂
Φ
E
∂t
EM force, Poynting vector, energy density
vector
F
=
q
parenleftBig
vector
E
+
vectorv
×
vector
B
parenrightBig
vector
S
=
vector
E
×
vector
B
μ
0
u
E
=
1
2
ǫ
0
vextendsingle
vextendsingle
vextendsingle
vector
E
vextendsingle
vextendsingle
vextendsingle
2
u
B
=
1
2
μ
0
vextendsingle
vextendsingle
vextendsingle
vector
B
vextendsingle
vextendsingle
vextendsingle
2
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 Spring '08
 Faculty
 Atom, Energy, Kinetic Energy, ETAN, Prof Debroy, Prof Nu~ez

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