Allison Bronstein
8 April 2014
PHYS 241
Section C: John Gloss
Unit 5: Motor Lab
Week 9 Section 2
Abstract: The goals of this section are to be able to derive the amount of power emitted,
efficiency of a motor, speed of rotation, and to understand the gene
Physics 241 - Electrostatics
1: You hold a conductor in each hand by an insulating handle. Assume that the conductor
in your left hand is charged and that the conductor in your right hand is neutral.
a: You move the conductor in your left hand near the co
1. Consider the electrical circuit shown below.
(a) Calculate the amount of current that flows through the 7 Ohm resistor and the equivalent
resistance of the network (Assume that the battery has negligible internal resistance). [20 points]
(b) If points
Gausss Law Practice Worksheet
htt :/bohr.' h sics.arizona.edu/~leone/ua 5 tin 2009/ h 324llab.html
Student Name: _/\_
1. Gausss Law applied to systems with spherical symmetry: A Cartesian representation of the electric
vector eld, E = Ex)? + E Q + E12, i
!
Bline =
Equations
!
Felectric =
1
qq
1
qq !
1 2 r =
1 2 r
4 0 r 2
4 0 r 3
!
F
1
q
r
E field = =
source
2
q0 4 0
r
! !
torque on dipole = p E
!
!
p = q dneg to pos
V (r) =
!
E finite line =
1
4 0
!
E disk
Q
% 1(
' *
! ! Q
electric = E d! = ! enclosed
Matt Weiner Phys. 241 Lab Lab Partner: Phillip Hoffman 9/4/06 Electrostatics and the Electric Field Goal: To provide some experience with the fundamental concept of an electric field and some of its characteristics. Theory: This lab discusses the ide
Matt Weiner Phys. 241 Lab Lab Partner: Phillip Hoffman 9/26/06 Acceleration Of Electrons In A Cathode Ray Tube, CRT Goal: To study the motion of electrons in electric fields using a cathode ray tube. Theory: This experiment basically is just throwing
PHYS 241
21.9.
Ch. 21 Homework Solutions
q1q2 . r2
IDENTIFY:Apply F = ma , with F = k
SET UP: a = 25.0 g = 245 m/s 2 . An electron has charge e = 1.60 1019 C. EXECUTE: F = ma = (8.55 103 kg)(245 m/s 2 ) = 2.09 N . The spheres have equal charges q, so q2 F
Allison Bronstein
25 March 2014
PHYS 241
Section C: John Gloss
Unit 4: Calculating Capacitance
Week 8 Section 2
Abstract: The goal of this experiment is to be able to find the total effective capacitance
of a system through two different methods. The firs
!
Exam 2
Capacitors
Properties:
o Positive and negative bodies are both conductors, which
implies that positive and negative potential are constant over
respective conductor
o Electric field, E, lines emerge from positive and disappear into
negative condu
Magnetic field for a straight line
o
o Approximation for an infinite wire (x<L)
!
Amperes Law:
o
!
Rules for amperes law:
" L must be a closed loop
" Only current enclosed by the loop counts in
Amperes law
"
Current can be positive or negative, depending
Exam One Study Guide
10/20/14 9:54 AM
Chapters 21, 22, 23
Electric
Charge:
Like charges repel
Opposite charges attract
The mass of an electron is 9.1*10 31 kilograms
The electric charge of an electron, -e, is 1.6 *10 19 Coulombs
A proton has a charge of +
Allison Bronstein
4 March 2014
PHYS 241
Section C: John Gloss
Unit 3: Oh-my Lab
Week 6 Section 3
Abstract: The goal of this lab is to determine the quantum mechanical property of the
LEDthe bond energy gapto prove that the LED is non-ohmic and to understa
Allison Bronstein
22 April 2014
PHYS 241
Section C: John Gloss
Unit 6 Lab Report
Week 12 Section 3
Abstract: The goal of this section is to experimentally determine the resonant frequency
of the secondary circuit and relate it to the carrier frequency of
Allison Bronstein
18 February 2014
PHYS 241
Section C: John Gloss
Unit 2: Beam Me Up Electron
Week 3 Section 2
Abstract: The goal of this lab is to experimentally test the horizontal and vertical CRT
deflection equation. The cathode ray was turned on and
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Allison Bronstein
4 February 2014
PHYS 241
Section C: John Gloss
Unit 1: Battery Power
Week 1 Section 5
Abstract: The goal of this section was to learn how to calculate the total power of each
circuit by first examining each individual parts of each circu
Magnetic properties of matter
10/20/14 9:18 AM
1) paramagnetic materials
Develop an induced weak dipole moment, parallel to applied
magnetic field
Weakly attractive
Occurs in systems with an unpaired electron (Net magnetic
moments due to pairs of elect
Electrical Conduction, Electrodynamics
10/20/14 9:19 AM
Electrodynamics: free electrons that are moving in conductors
Assumptions about conductors, E=0, is no longer true
E =/= 0 in conductors NOW, because the charges have to move
o Electric field is req
Conductors
10/20/14 9:18 AM
Conductors: bodies which have a large number of freely moving chargesin
the electrostatics case
For now we will solve after the charges have already settled down
and are motionless
1) There can be NO E field inside a conducto
Dielectrics
10/20/14 9:19 AM
Dont conduct, but not called an insulator because there is no such thing as
a perfect insulator, dielectrics are in between insulators and conductors
Conductor:
o
Dielectrics: the object is responding to the electric field wi
Capacitors and Capacitance
10/20/14 9:19 AM
Provide a method for controlled release and storage of charges
Definition of Capacitor: Any set of two conductors holding equal and
opposite charges, +q and q, net charge on a capacitor is always zero
We define
EMF: Electromotive force
10/20/14 9:19 AM
Energy per unit charge supplied by the battery
A battery is a charge separatorit does not product charge
o
Examples:
Terms:
Resistor: any circuit element which has an Ohmic response
(current proportional to the c
Electrostatic Potential Energy and Electrostatic
Potential
10/20/14 9:18 AM
Works depend on initial point, final point and path taken
Conservative Forces: Gravitational, electrical
Work done is independent of the path taken, only depends on the
final and
Electric Charge
10/20/14 9:18 AM
Electromagnetism:
Study of physical laws that govern the interaction between charged
particles and between currents (moving charge)
1) Stationary charges: electrostatics
2) Moving charges: electrodynamics
3) Leads to unde
Faradays Law
10/20/14 9:18 AM
Faraday Stuff
Charge carriers experience magnetic forces because they are
moving with the wire
On section two, the charge carriers move along the wire due to the
magnetic force
There must be some electric potential difference