PHY 2140
Class 20, 2/21
Section 001 (David Bowen)
Backchannel URL:
TodaysMeet.com/Frameup
Stuff
New Google Moderator site for review topics
for Hour Exam 2
Discussion of common problems on Hour Exam
1 posted on Blackboard under Content >
Exams and relat
PHY 2140
Class 22, 2/25
Section 001 (David Bowen)
Backchannel URL:
TodaysMeet.com/Framed
Stuff
New Google Moderator site for review topics
for Hour Exam 2
Good question to ask yourself: four wires
problem what about changing directions of
current? Also
Psy 3010
Frequency Distributions and Histograms
1. The following are the number of graduate schools applied to by a group of psychology
students. Set up a grouped frequency distribution of these data. Make the class intervals 2
units wide and begin your l
1. When a light ray in water (n = 1.33) enters glass with index of refraction 1.60, what is the
greatest angle of refraction that can occur?
A. 90.0
B. 56.2
C. 52.2
D. 38.7
E. 0.0
2. A small object is enclosed in plastic (n = 1.5). The object appears to b
Psy 3010
Central Tendency and Dispersion
1. Find the mean, median, and mode for each of the following sets of scores.
a. 3, 6, 4, 7, 8, 5, 7, 9, 4, 7
b. 10, 8, 12, 9, 20, 9, 11
2. For which of the sets of scores in question #1 is the mean a poor measure o
Psy 3010
Central Tendency and Dispersion
1. Find the mean, median, and mode for each of the following sets of scores.
a. 3, 6, 4, 7, 8, 5, 7, 9, 4, 7 (Mean = 6, Median = 6.5, Mode =7)
b. 10, 8, 12, 9, 20, 9, 11
(Mean = 11.29, Median = 10, Mode = 9)
2. For
Physics 2140 Practice Exam 1
Physics 2140.010 Practice Exam 1
1. A cube contains a point charge Q at its center. What is the total flux through one
side of the cube?
A. (1/6)kQ
B. (2/3)kQ
C. kQ
D. 4kQ
E. 0
2. A helium nucleus is accelerated from rest thro
Exam 2
Form A
PHY 2140 Sec 001 Winter 2012. On the Scantron form, write and bubble in your name (no need
for ID number) and write the Form (A or B) in the top margin.
Name _ Row _ Seat Number _
Please mark your quiz section.
_ Monday (Christopher Zin)
_ T
Exam 3
Form A
PHY 2140 Sec 001 Winter 2012. On the Scantron form, write and bubble in your name (no need for ID
number) and write the Form (A or B) in the top margin.
Name _ Row _ Seat Number _
Please mark your quiz section.
_ Monday (Christopher Zin)
_ T
1,.
A diverging lens of focal length 25 cm is placed 10 cm behind a converging
lens of focal length 15 cm., If the object is at infinity, where will the final
image form from the diverging lens?
Ans : S2 + + 6.25 cm ( behind the diverging lens)
2.
Two 20
PHY 2140 Formula Sheet
Constants
c
0
0
|e|
me
mp
E1
a0
C
R
r0
1u
h
=
=
=
=
=
=
=
=
=
=
=
=
=
=
Chapter 16
2.99 108 m/s
8.85 1012 N m2/C2
4 107 T m/A
1.60 1019 C
9.11 1031 kg
1.67 1027 kg
13.6 eV (Hydrogen)
52.9 pm
2.426 pm
1.097 107 m1
1.2 fm
1.66 1027 kg
Phys 2141
Jan 31, 2011 3PM
Equipotential Lines and Lines of Force
Purpose: The purpose of this experiment is to learn about the glow of current through extended
conductors by doing various tests and recording the results.
Procedure: We had to pick a few d
Assume all charges are positive initially. In most of the cases the straight fingers can
represent v and curling fingers ( into the palm) represent B
In the problems below use either / both vector cross product and right hand rule
to get correct answers.
Chapter 19
Chapter 21
Constants
F = q v x B = q v B sin
= 2f
0 = 4 x 10-7T.m
A
L
F=I
xB= I
= NIAB sin
r = mv
qB
L B sin
v=E
B
B= oI
2r
f
Irms = Imax
2
Vrms = Vmax
2
Vrms = Irms R
XC = 1
=1
C
1eV = 1.6 X 10-19 J
c = 3 x 108 m/s
2f C
XL = L = 2f L
Vrms(C)
Multiple choice Questions for Practice
Chapter 18
100 m of a certain type of wire has a resistance of 7.2 . What is the resistance of
2.5 m of the same wire?
(11)
A.
B.
C.
D.
E.
18
1.8
0.18
3.0
0.30
The resistance of a wire increases 3.9 %when the te
Chapter 19 MCQ
1. An electron is moving at 3x10 6 m/s at 40 o to a magnetic field of 0.80 T
What is the magnitude of force on the electron?
A.
4.8 x10-13 N
B.
3.8 x10-13 N
C.
2.9 x10-13 N
D.
2.5 x10-13 N
E.
1.2 x10-13 N
Ans D
2. An electron is moving at 2
Magnetism
Magnets
A
magnet is an object that produces
a magnetic field.
A magnetic dipole has both a north
and south pole.
All
known magnets are magnetic
dipoles.
A hypothetical magnetic monopole
would have either only a north pole
or only a south pole
1. A 12.6 V battery is in series with a 30.0 mH inductor and 0.150 ohm resistor connected through
a switch. When the switch is closed at t =o, find time constant of the circuit( ans: 0,2 s)
Find the current after 1 time constant has elapsed ( ans: 53.1 A)
Physics 2140 Practice Exam 2
Covering Chapters 18 through 22
1 (Chapter 18). In the diagram, if the current through R1 is 5 A up and if the current
through R3 is 3 A up, what is the current in R2?
A. 8 A up
B. 8 A down
C. 2 A up
D. 2 A down
E. more inform
A radar sends a radio signal of frequency 9 x 109 Hz towards an aircraft approaching the
radar. If the reflected wave shows a frequency shift of 3 X 103 Hz, the speed with which
the aircraft is approaching the radar in m/s is (velocity of radio signal is
Chapter 17 Electric Potential
1. Doubling both charges changes the potential energy for a pair of point charges by a factor of:
A. 2.
B. 4.
C. .
D. .
E. 1 (no change).
4. What is the distance between a -2.00 C charge and a -3.00 C charge if their potentia
MAP 2302
Differential Equations
Exam 1 C
Name: _
1. Solve the differential equation
dy
xy
dx
2
dx
x 1
dy
xy
dy
xdx
1
ln y ln x 2 1 c 2 ln y ln x 2 1 k
2
dx x 2 1
y
2
x 1
y2
y2
y2
ln
c1
e c 1
C y 2 C x 2 1
2
2
2
x 1
x 1
x 1
2
2. Solve the Bernoullis e
Worksheet magnetism 2 solutions
1. Refer to the diagram shown above. Even though there appears to be no power source, a current of 10A flows through this closed loop due to
an external magnetic field. The distance between parallel wires one and three is 0
MAGNETISM & EFFECTS ON
ELECTRON STREAM
AHMED HAMMOUD
FRANK R UDOWSKI
OMAR ALIADIRI
TEAM TESLA
PHYS. 232-70
ABSTRACT
The purpose of this lab was to classify different objects by their magnetic properties as well as determine
if a magnet would affect an ele
CALCULATING INDUCTANCE OF
SOLENOIDS
AHMED HAMMOUD
FRANK RUDOWSKI
OMAR ALJADERI
TEAM TESLA
P HYS . 232-70
ABSTRACT
The purpose of this experiment was to calculate the inductance values for individual solenoids and see if
the calculated equivalent inductanc
WELCOME !
Physics 232
General Information
The International System of Units (S.I.),
commonly referred to as the metric system is
used by all branches of science including physics
prefixes
in everyday use
in nearlySIevery
country.
Text
Symbol
Factor
Scient
OBSERVING COMPONENT COLORS OF
GASES
AHMED HAMMOUD
FRANK RUDOWSKI
OMAR ALJADERI
TEAM TESLA
P HYS . 232-70
ABSTRACT
The purpose of this experiment was to observe the color spectrum produced by different gases when
they were excited and calculate their resul
Proving Kirchhoffs Loop Law
Team Tesla
Physics 232
Abstract
We conduct an experiment to prove Kirchhoffs Loop Law concerning voltage drops and rises. Our testing
results in measurements and calculations that prove Kirchhoffs Loop Law
Introduction
Gustav K
INDIRECT MEASUREMENT OF
ENERGY ELECTRIC POTENTIAL
AKA
AHMED HAMMOUD
TEAM TESLA
PHYS. 232-70
ABSTRACT
The purpose of this lab was to investigate the current flow and voltages in series and parallel circuits
using Ohms law. We concluded that using Ohms law
Chapter 16 Electric Forces and Fields
2. How many electrons does it take to make one coulomb of negative charge?
A. 1.00 109
B. 6.25 1018
C. 6.02 1023
D. 1.66 1018
E. 2.24 104
10. Two equal point charges are separated by a distance d. When the separation