Solutions to OHW 9 (Partial)
(04/16/2013)
OHW 9_#2 (Problem 22.7):
Two closely spaced slits produce a double-slit interference pattern.
The dark fringes are located at positions given by:
(
ym = m +
(
y5 y1 = 5 +
1
2
1
2
) dL
m = 0, 1, 2, 3,
) dL (1 + )

PHYS270 Spring 2013: 02 Sections
Professor Ouyang
Midterm Exam Review 2 (Ch.35, Ch.36 and Ch.37)
Note: Ch.35.1 is not required in this exam.
Chapter 35:
(1) Maxwells Equations:
q
E dA = 0 (Gauss's law)
B dA = 0 (Gauss's law for magnetism)
d B
(Farada

Solutions to OHW 4 (Partial)
(03/04/2013)
OHW 4_#4 (Problem 35.38):
Assume the electric field inside the capacitor is uniform and use the Ampere-Maxwell
law.
a) For a current-carrying wire, an equation for the magnetic field strength is:
(
)
7
0 I wire 4

Physics 270 (02 Sections) Spring 2013
Practice Midterm Exam 2
Solution
Name: _
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assignment/examination.
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Solutions to OHW 6 (Partial)
(03/26/2013)
OHW 6_#5 (Problem 36.22):
The AC current through an inductor lags the inductor voltage by 90o.
(a) From Equation 36.21,
I L = 330 A =
L=
VL
V
= L
XL 2 fL
2.2 V
(
)(
6
2 45 10 Hz 330 10
6
A
)
= 2.4 105 H = 24 H
(b

Physics 270 (02 Sections) Spring 2013
Practice Midterm Exam 2
Name: _
Honor Pledge: I pledge on my honor that I have not given or received any unauthorized assistance on this
assignment/examination.
Honor Pledge:
Signature:
Instructions:
Please make sure

PHYS270 Spring 2013: 02 Sections
Professor Ouyang
Chapter 40 Review
Note: Ch 40.5-40.6 are not required in this exam.
(1) Wave function and Probability density P:
wave function (x) is a continuous, wave like (i.e., oscillatory) function
the probability

Practice Problem on Chapters 40 & 41
(05/09/2013)
Problem 1: A quantum particle is described by the wave function:
ce x / , for x 0nm
( x) = x /
, for x 0nm
de
where = 2.0 nm.
(a) Find the constants c and d (give magnitude and units). Hint: first deter

Practice Problem on Chapters 40 & 41
(05/09/2013)
Problem 1: A quantum particle is described by the wave function:
ce x / , for x 0nm
( x) = x /
, for x 0nm
de
where = 2.0 nm.
(a) Find the constants c and d (give magnitude and units). Hint: first deter

Phys270 _ Final Review_ 05/10/2013
Classical Physics:
Ch33: Magnetic Field
When things
get fast
Ch35: Electromagnetic Fields & Waves
Special
Relativity:
Ch36: AC Circuits
Ch37: Relativity
Ch34: Electromagnetic Induction
Ch22: Wave Optics
Ch23: Ray Optics

Wednesday: Induction
Changing E field makes B field
Changing B field makes E field
Induced emf has more meaning than induced Voltage, especially since
theres not necessarily a wire, or if its a full circle loop, cannot have
potential difference
Dr. Margue

Questions remaining from Friday
Transformer demo showed no change after I changed
N2 from 4 turns to 8 turns
I wasnt careful in the direction of turns of the wire when I changed from
4 to 8 turns, if some were in the opposite direction, it would cancel o

Friday
LC circuits
capacitor charge
current in Inductor
LR circuits
= time constant
Dr. Marguerite Tonjes
PHYS 270
Feb. 17, 2016
1
Circuit elements
PHYS260 notes + Knight 33 + Knight 29.5
(have seen this for bulb)
Closed circuit: path for current to flo

Friday: Magnetic Dipole Field
Dr. Marguerite Tonjes
PHYS 270
Feb. 1, 2016
1
Force on a moving charge from a B field
Il=qv
Dr. Marguerite Tonjes
PHYS 270
Feb. 1, 2016
2
Where theres a field, theres a force
Dr. Marguerite Tonjes
PHYS 270
Feb. 1, 2016
3
Forc

Problem 32.25
quick note
Dr. Marguerite Tonjes
PHYS 270
Feb. 8, 2016
1
Friday
Ampres law:
Bsolenoid = 0 n I
Ferromagnets
Dr. Marguerite Tonjes
PHYS 270
Feb. 8, 2016
2
Friday: Induction
Generate a current (E-field) with a
B-field
If the B-field is chang

Monday: Resistors & Capacitors in AC
VC = IC XC relates peak Voltage (VC) and Peak
Current (IC), NOT instantaneous vC and iC
Dr. Marguerite Tonjes
PHYS 270
Feb. 24, 2016
1
RC Filter Circuits
Dr. Marguerite Tonjes
PHYS 270
Feb. 24, 2016
2
Inductors in AC c

Solutions to OHW 10 (Partial)
(04/21/2013)
OHW 10_#2 (Problem 22.29):
For sodium light of the longer wavelength (1) and of the shorter wavelength (2),
L = m
1
2
(
2
)2
L = m + 1
We want the same path difference 2(L2 L1) to correspond to one extra waveleng

PHYs270 (01 & 02 Sections) -Spring 2013 Name:
Midterm Exam 1
February 25th, 2013
Section #:
Honor Pledge: I pledge on my honor that I have not given or received any unauthorized assistance on this
assignment/examination.
Honor Pledge:
Instructions:

Physics 270 (02 Sections) Spring 2013
Practice Midterm Exam 3
Solution
Name: _
Honor Pledge: I pledge on my honor that I have not given or received any unauthorized assistance on this
assignment/examination.
Honor Pledge:
Signature:
Instructions:
Please m

Physics 270 (02 Sections) Spring 2013
Practice Midterm Exam 3
Name: _
Honor Pledge: I pledge on my honor that I have not given or received any unauthorized assistance on this
assignment/examination.
Honor Pledge:
Signature:
Instructions:
Please make sure

Solutions to OHW 11 (Partial)
(04/30/2013)
OHW 11_#3 (Problem 23.68):
1 1 1
fs
+ = s =
s s f
s f
We are given f = 60 cm, s = 20 cm, and h = 1.0 cm.
s =
fs
(60 cm)(20 cm)
=
= 15 cm
s f
20 cm + 60 cm
The negative sign means the image is behind the mirror; i

Solutions to OHW 8 (Partial)
(04/10/2013)
OHW 8_#4 (Problem 37.30):
S is the grounds frame and S is the rockets frame. S moves with velocity v = 0.5c
relative to S.
1
1
2 2
2
(a) We have = [1 ( v c) ] = [1 (0. 50) ] = 1.155 . Applying the Lorentz transfor

PHYS270 (01 & 02 Sections) -Spring 2013 Name: _
Midterm Exam 2
April 8th, 2013
Solution
Section #: _
Honor Pledge: I pledge on my honor that I have not given or received any unauthorized assistance on this
assignment/examination.
Honor Pledge:
Signature:

PHYS270 Spring 2013: 02 Sections
Professor Ouyang
Midterm Exam Review 1 (Ch.33-Ch.34)
Chapter 33:
(1) Right-hand
rules:
A
B
,
curl
them
to
point
along
, then your
C = A B : Point your fingers along
thumb will point along C
(2) Biot-Savart Law:
Magnetic

PHYS270 (01 & 02 Sections) -Spring 2013 Name: _
Midterm Exam 3
May 6th, 2013
Solution
Section #: _
Honor Pledge: I pledge on my honor that I have not given or received any unauthorized assistance on this
assignment/examination.
Honor Pledge:
Signature:
In

Solutions to OHW 2 (Partial)
(02/19/2013)
OHW 2_#6 (Problem 33.38):
The torque on a current loop is due to the magnetic field.
a) We can use the right-hand rule to find the force direction on the currents at the top,
bottom, front, and back segments of lo

Solutions to OHW 7 (Partial)
(04/03/2013)
OHW 7_#2 (Problem 37.13):
You and your assistant are in the same reference frame. Light from the two lightning
bolts travels toward you and your assistant at 300 m/ms. You and your assistant have
synchronized cloc

Solutions to OHW 3 (Partial)
(02/26/2013)
OHW 3_#5 (Problem 34.38):
Assume the wire is infinitely long.
The current through the wire produces a steady magnetic field, but the magnetic field
strength depends on the distance from the wire. The loop moves aw

Solutions to OHW 5 (Partial)
(03/12/2013)
OHW 5_#5 (Problem 35.62):
Use Maluss law for the polarized light.
For unpolarized light, the electric field vector varies randomly through all possible values
of .
Because the average value of cos2 is 12 , the int

Practice
Physics 270 (02 Sections) Spring 2013
Name: _
Practice Midterm Exam 1
Section #: _
Honor Pledge: I pledge on my honor that I have not given or received any unauthorized assistance on this
assignment/examination.
Honor Pledge:
Signature:
Instructi

Solutions to OHW 1 (Partial)
(02/12/2013)
OHW 1_#5 (Problem 33.2):
The current in the wire is directed to the right. B2 = 20 mT + 20 mT = 40 mT because the
two overlapping wires are carrying current in the same direction and each wire produces a
magnetic

PHYS270 Spring 2013: 02 Sections
Professor Ouyang
Midterm Exam Review 3 (Ch.22, 23, Ch.25, Ch.38 & Ch.39)
Note: Ch25.1-25.2, Ch.38.1- 38.5 are not required in this exam.
Chapter 22:
(1) Interference:
In general, the superposition of two or more waves int

Physics 270 (02 Sections) Spring 2013
Practice Midterm Exam 1
Solution
Name: _
Honor Pledge: I pledge on my honor that I have not given or received any unauthorized assistance on this
assignment/examination.
Honor Pledge:
Signature:
Instructions:
Please m