.
594
CHAPTER 19 ELECTRIC POTENTIAL ENERGY AND THE ELECTRIC POTENTIAL
Section 19.3 The Electric Potential Difference
Created by Point Charges
3
(a) A, B, C
6. The drawing shows three arrangements of charged particles, all
the same distance from the origin
PHYSICS 102 "Formula" Sheet
-1
-12
Constants: k = 9 x 109
μo = 4 x 10-7
o = (4 k) = 8.85 x 10
e = 1.602 x 10-19 (all in appropriate MKS units)
1eV = 1.602 x 10-19 joule
F =k
E = F /q =
Electric Field:
k
q1q 2
(repulsive for like charges, attractive for un
Homework 7
Physics 204, evening summer 2008
Part 1
1. The distance from earth to the center of the galaxy is about 23500 ly (1 ly = 1 light‐year =
9.47 1015 m), as measured by an earth‐based observer. A spaceship is to make this journey
at a speed of
Homework 7 solutions
Physics 204 evening summer 2008
1.
REASONING The distance between earth and the center of the galaxy is the proper length L0, because
it is the distance measured by an observer who is at rest relative to the earth and the center of t
Homework 6
Physics 204, summer 2008
Part 1
1. Read sections the parts of 11.6 involving lenses and the parts of 11.2 and 11.5 involving
interference and the double slit experiment in Physics: The First Science.
2. Chapter 11 guided review 13.
3. Chap
Weihua Zheng
Hw6
Physics 204, Summer 2008
Part 1
2,3 omitted.
4. Without the glasses, the farsighted person can only see the newspaper by holding
it 48cm away from his eyes. With the glasses, he can hold the newspaper 25 cm away from
his eyes and read. So
Homework 5
Physics 204, summer 2008
Part 1
1. Read sections 11.1, 11.4, and the parts of 11.6 involving reflection and plane mirrors in
Physics: The First Science.
2. A generator uses a coil that has 60 turns and a 0.50 T magnetic field. The frequency
Homework 4
Physics 204, summer 2008
Part 1
1. Read section 10.1 in Physics: The First Science.
2. In a lightning bolt, 16 C of charge flows in a time of 1.5 × 10 −3 s . Assuming that the lightning bolt can
be represented as a long, straight line of cu
Physics 204 Homework 4
2. The current is I = 16 C/1.5 × 10−3 s = 1.1 × 104 A. Plugging this and the distance
r = 20 m into the formula for the magnetic ﬁeld of a long current, one obtains
B=
µ0 I
= 1.1 × 10−4 T.
2πr
3. (Ch 10, P 1)
(a) Equating the magnit
Homework 3
Physics 204, summer 2008
Part 1
1. Read section 9.2 in Physics: The First Science.
2. Chapter 9 guided review 15
3. Chapter 9 problem 7. Hint: The copper block and the copper wire will have the same volume.
4. Chapter 9 synthesis problem a
Weihua Zheng
Hw3
Physics 204, Summer 2008
Part 1
2. (Chp 9 GR 15)
Resistance in wire can be calculated by R = ρ
L=
RA
ρ
=
L
, we can change the form so that
A
1Ω ⋅ [3.14 ⋅ (0.1mm) 2 ] 1Ω ⋅ [3.14 ⋅ (10−4 m) 2 ] 3.14 × 10−8
=
=
m = 1.85m
1.7 × 10− 8 Ωm
1.7
Homework 2
Physics 204, summer 2008
Part 1
1. Read section 9.1 in Physics: The First Science. The textbook is meant to be an active learning tool.
Reading it is very important and you should plan on spending time doing it. The examples are an
integrat
R2
-18V
-18V
#2 (Ch. 9 GR1)
a‐c)
( 9 × 10 )(1 × 10
kQ
=4
r
1/ 2
9
U center = 4
(
)
−9
) = +50.9V
d)
U center = 2
k ( +Q )
k ( −Q )
−2
= 0V
r
r
#6 (Ch9, SPP1)
a) as we add more charges we form a charged plate.
b) As we add more negative ch
564
CHAPTER 18 ELECTRIC FORCES AND ELECTRIC FIELDS
A and B,
Object A
-2.00 iL'
onto B to
tractive fo
LEMS
Problems that are not marked with a star are considered the easiest to solve. Problems that are marked with a single star (*) are more difficult, whi
Exam #2 practice problems
Physics 227
1. Consider the circuit shown.
a. Determine the power output of each light bulb (shown as
resistors).
b. What assumptions did you make about the circuit?
2. In many science fiction stories, charged pa
Exam #1 practice problems solutions
Physics 227
1. Three glass spheres of positive charge = 10%& are arranged so that they are located at the corners of a square of
side = 0.1 . A proton is placed at the center of the square, then released so it can
Exam #3 practice problems solutions
Physics 227
1. James C. Maxwell found a problem with Amperes Law. Explain this problem, what Maxwell did to correct it, and
how this led to a new understanding about the nature of light.
Amperes Law prior to Maxwell
Exam 1 solutions
Name:
Physics 227
Instructions:
The responsibility is yours to show me that you understand what you are doing so please
show all your work. If you feel you are stuck on a particular part explain as much of your
thinking as you c
Exam #2 practice problems solutions
Physics 227
1. Consider the circuit shown.
a. Determine the power output of each light bulb (shown as
resistors).
b. What assumptions did you make about the circuit?
First, Ill simplify the circuit and find the c
Exam #3 practice problems
Physics 227
1. James C. Maxwell found a problem with Amperes Law. Explain this problem, what Maxwell did to correct it, and
how this led to a new understanding about the nature of light.
2. You are a safety inspector hired
Exam 2 solutions
Physics 227
Name:
Instructions:
Score
The responsibility is yours to show me that you understand what you are doing so please
show all your work. If you feel you are stuck on a particular part explain as much of your
thinking as you can s
Exam 3 solutions
Name:
Physics 203
Instructions:
Score
The responsibility is yours to show me that you understand what you are doing so please
show all your work. If you feel you are stuck on a particular part explain as much of your
thinking a
Exam #1 practice problems
Physics 227
1. Three glass spheres of positive charge = 10%& are arranged so that they are located at the corners of a square of
side = 0.1 . A proton is placed at the center of the square, then released so it can move free
Physics 204
Physics 194
Exam #1 practice problems solutions
1. Nuclear fusion is a highly sought after alternate energy source because it is environmentally friendly and
uses very abundant fuels. However, it is a technical challenge to get two atomic nucl
Light/Wave Interference
Objective: To see how light waves interfere constructively and destructively. To observe interference and diffraction. To measure small apertures or objects using their diffraction patterns. Apparatus: Laser, slides (single-slit, d