' Potential of a negative charge q is W")2
Electrical Potential of point charge
r . 90
V r) sooov
The equipotentials of a point charge are shown in Fig.23.23 (a).
Field lines are shown in red and equipotential surfaces in blue
The equipotential surfaces
Electric Potential and RC Discharge - Lab Report
Your Name: Anqi(Angel) Cao Partners Name: Nicole Garcia
Section: B09 Date: 11/17/15
As always show your mathematical work with appropriate equations.
1. Using a single point charge of 2, indicate where (how
PH 1120 - Resistors & Light Bulbs - Lab Report
Your Name: Angel Cao Partners Name: Nicole Garcia
Section: B09 Date: 11/19/15
1
Write down the values for your measured R1 and R2 in standard form (Uncertainty
to one digit unless the lead digit is 1, in whic
HW 12: Ampere's Law, Solenoids
4/25/15, 2:52 PM
HW 12: Ampere's Law, Solenoids
Due: 12:50pm on Monday, April 27, 2015
You will receive no credit for items you complete after the assignment is due. Grading Policy
Exercise 28.42
The figure shows, in cross s
HW 10: Magnetic Forces & Torques
5/3/15, 5:31 PM
HW 10: Magnetic Forces & Torques
Due: 12:00pm on Monday, April 20, 2015
You will receive no credit for items you complete after the assignment is due. Grading Policy
Exercise 27.48
A and N turns is free to
HW 14: Motional Electromotive Potential
4/25/15, 4:40 PM
HW 14: Motional Electromotive Potential
Due: 12:50pm on Monday, May 4, 2015
You will receive no credit for items you complete after the assignment is due. Grading Policy
Exercise 29.22
A rectangular
HW 3: Electric Charge & Electric Fields
3/28/15, 6:48 PM
HW 3: Electric Charge & Electric Fields
Due: 12:01pm on Monday, March 23, 2015
You will receive no credit for items you complete after the assignment is due. Grading Policy
Exercise 21.43
Two positi
HW 13: Electromagnetic Induction
4/25/15, 3:25 PM
HW 13: Electromagnetic Induction
Due: 12:50pm on Wednesday, April 29, 2015
You will receive no credit for items you complete after the assignment is due. Grading Policy
Exercise 29.20
A circular loop of wi
The Electric Field Lab Report
(Due by midnight of the day of the Lab)
For Full Marks you must show your work. Repeated calculations need only be
presented once.
Name: _Anqi Cao_, Partner:_Nicol Garcia_
Section: _B 09_, Date_11/4/15_
Note: It is always imp
PH 1120 - Electric Potential & Determining Resistance
Lab Report
Remember to use equations and show your work
Your Name: Anqi(Angel) Cao Section: B09
Partners Name: Nicole Garcia Date 11/12/15
1
Can two equipotential surfaces with different potential valu
PH 1120 - Electric Fields & Field Lines Lab Report
Equations are useful and often the only solution to a full
explanation to a question in a Lab Report.
Name:_Angel Cao_; Partner:_Nicole_
Section:_B 09_; Date:_11/5/15_
1. You have 3 point charges in your
PH1120 - B2015
Conference Dec 8, 2015
Magnetic Field
for a charged particle
Magnetic Field
for a current element
Magnetic Field
for a long current wire
Magnetic force between
two parallel conductors
Attractive if currents are in the same direction and rep
The Electrical Potential
The potential offers an alternative way of thinking about electric elds.
0 It is a scalar, and so easier to work with.
0 It can be visualized using equipotential lines or surfaces.
0 It is directly related to the concept of energy
Electrical Properties of Metals
A metal is a substance with a large number of free electrons in it.
1. The electric eld inside a metal is always zero.
2. Any excess charge placed on a metal always distributes itself on its outer
surface.
3. The electric e
THE ELECTRIC FIELD
The notion of the electric eld was introduced by Michael Faraday.
A charge produces an electric eld in the space around it.
The electric eld is described by a vector at every point in space.
The electric eld acts on a charge and exerts
PH1120 - B2015
Conference Dec 10, 2105
Faradays Law
The induced emf in a closed loop equals the negative of
the time rate of the change of magnetic flux through the loop
Lenzs Law: Induced current or emf always tends to
oppose or cancel out the change tha
PH1120 - B2015
Conference Dec 1, 2015
Capacitors in Parallel
Dielectrics
Capacitors in Series
Current and Resistance
J=I/A
Ohms Law
Electromotive Force (emf)
Potential Loop Rule
Power and Energy
Resistors in series
Resistors in parallel
Magnetic Force
Mag
PH1120 - B2015
Conference Dec 3, 2015
Magnetic Force on a current-carrying wire
Magnetic Torque
Magnetic Moment
For N coils
Potential Energy for a magnetic dipole
From HW Magnetic Torque due Friday
From HW Magnetic Torque due Friday
Group Work #8
PH1120 - B2015
Conference Dec 15, 2015
Magnetic Force on a current-carrying wire
Magnetic Torque
Magnetic Moment
For N coils
Potential Energy for a magnetic dipole
Magnetic Field
for a charged particle
Magnetic Field
for a current element
Magnetic Field
f
PH1120 - B2015
Conference Nov 10, 2015
Key Concepts
Coulombs Law
direction: repulsive if same sign, attractive if opposite
Definition: Electric force per unit charge
Electric Field Lines
Electric Flux
Gausss Law
Oppositely charged parallel plates
Electric
HW 7: Capacitance, Dielectrics & Energy
4/6/15, 8:10 PM
HW 7: Capacitance, Dielectrics & Energy
Due: 12:00pm on Tuesday, April 7, 2015
You will receive no credit for items you complete after the assignment is due. Grading Policy
Exercise 24.43
When an air
HW 11: Producing Magnetic Fields
4/21/15, 7:01 AM
HW 11: Producing Magnetic Fields
Due: 12:50pm on Friday, April 24, 2015
You will receive no credit for items you complete after the assignment is due. Grading Policy
Exercise 28.10
(0.500 mm) ^j carries a
HW 11: Producing Magnetic Fields
4/21/15, 7:01 AM
HW 11: Producing Magnetic Fields
Due: 12:50pm on Friday, April 24, 2015
You will receive no credit for items you complete after the assignment is due. Grading Policy
Exercise 28.10
(0.500 mm) ^j carries a
d R=4n V
@2012 Penman Educallon. Ina.
Shown above is a circuit with a non-ideal battery having an internal resistance of r = 29 .
E =2A
r+R_2+4
The current owing in the circuit is I =
The potential drop across the internal resistance is Ir = (2A)(22) =
. ,Q
I ' M3:
JM /
R=4JL
I a E. E) w 3A
R h 4.32.,
W: dkzl
Vowbaaa- jgzii-CIE
:. Elk: @7149; 3Q w = 2433.1 _
R 7?
f P; f1; YE. wants
3 FDrW/hxQO-/Fs WA 3&4)th u; a MAE: ._._ 13. MLE; Jgjuhkf no M _M ._U~Lv.~_._ 0%W_W_Hmm
._~_._.-_.\1.014E~.\-_[A3*_.$m. "=-
Here is a detailed explanation of the problem I solved on the previous page.
I rst combined the capacitors using the rules for series and parallel until I reduced them down to
the single equivalent capacitance of 2,1117 shown in the lowest gure. The char
RULES FOR ELECTRIC FIELD LINES
o B eld is tangent to the eld line at each point
0 Field is strong where lines bunch up and weak Where they are
far apart
0 Field lines pass through every point of space
0 Field lines begin on positive charges and end on neg
CURRENT AND RESISTANCE
Current I m dQ/dt = charge ow per unit time Unit: C/s = ampere (A)
Some typical currents are:
Flashlight = 1A Home Circuitry = lO-lSA ,
Starter motor (car) = 200A Computer circuits = lpA lnA
Current density J = I/A = current per uni