# Register now to access 7 million high quality study materials (What's Course Hero?) Course Hero is the premier provider of high quality online educational resources. With millions of study documents, online tutors, digital flashcards and free courseware, Course Hero is helping students learn more efficiently and effectively. Whether you're interested in exploring new subjects or mastering key topics for your next exam, Course Hero has the tools you need to achieve your goals.

12 Pages

### 13ohm3s

Course: PH 102, Fall 2009
School: Augustana
Rating:

Word Count: 479

#### Document Preview

Law Physics Ohm's 102 Professor Lee Carkner Lecture 13 Potential difference (V or V): in volts (joules per coulomb) Circuit Theory Current (I): in amperes (amps, coulombs per second) I = Q/ t Resistance (R): how hard it is to get current to flow in ohms (volts per ampere) Resistance Good conductors have low resistivity, good insulators have high resitivities The total resistance of the...

Register Now

#### Unformatted Document Excerpt

Coursehero >> Illinois >> Augustana >> PH 102

Course Hero has millions of student submitted documents similar to the one
below including study guides, practice problems, reference materials, practice exams, textbook help and tutor support.

Course Hero has millions of student submitted documents similar to the one below including study guides, practice problems, reference materials, practice exams, textbook help and tutor support.
Law Physics Ohm's 102 Professor Lee Carkner Lecture 13 Potential difference (V or V): in volts (joules per coulomb) Circuit Theory Current (I): in amperes (amps, coulombs per second) I = Q/ t Resistance (R): how hard it is to get current to flow in ohms (volts per ampere) Resistance Good conductors have low resistivity, good insulators have high resitivities The total resistance of the material also depends on its size The resistance can be written as: where is the resistivity, L is the length, and A is the cross sectional area R = (L/A) How much current do you get if you put a potential difference V across a wire with resistance R? High voltage, low resistance means large current Ohm's Law Commonly written as: V = IR Every individual piece of a circuit has its own value of V, I and R and obeys Ohm's law Temperature and Resistance Resistors convert energy from the current into heat Temperature also affects electronic properties This increased random motion means collisions are more frequent and it is harder for current to flow Resistance generally increases with temperature As current flows though a resistor, its resistance changes (we usually neglect this) Charges have energy: Energy in Electric Circuits converted to converted to Power radiated by resistor is: (Energy/Coulomb)(Coulomb/Second) = (Energy/Second) V = P Using Ohm's law (V = IR) we can write: = P I2R and P = (V)2/R Lightbulbs A common circuit element is the lightbulb Household lightbulbs are rated in watts Brightness of lightbulb = power In the US, most power outlets produce 120 volts of potential difference Those that do not use a transformer Conservation of Charge We can find V, R and I for different parts of circuit by applying two conservation rules (for charge and energy) If the current splits, the two new currents must sum to be equal to the original Otherwise charge would be gained or lost Conservation of Energy Each resistor has a V associated with it The sum of the voltage drops across all circuit elements on a single wire must be equal to the potential difference across the ends of the wire All wires connected between the same two points must have the same V Since the change in potential ene...

Find millions of documents on Course Hero - Study Guides, Lecture Notes, Reference Materials, Practice Exams and more. Course Hero has millions of course specific materials providing students with the best way to expand their education.

Below is a small sample set of documents:

Augustana - PH - 313
Pure SubstancesThermodynamics Professor Lee Carkner Lecture 5PAL # 4 First LawP Pumping water uphill and then running it back to produce energy P But the pump and the turbine are only 75% efficientP Rate of power imparted to water = P Wwater =
Augustana - PH - 202
DoubleSlitDiffractionPhysics202 ProfessorLeeCarkner Lecture27Singleslitdiffraction,howbrightisspot5cm fromcenter?=680nm,a=0.25mm,D=5.5m Converty=5cmto tan=y/D,=arctan(y/D)=0.52deg NeedtofindtofindI =(a/)sin=10.5rad I=Im(sin/)2=0.007ImPAL#26D
Augustana - AS - 311
TelescopesandSpacecraftAstronomy311 ProfessorLeeCarkner Lecture7Ifitislowtidewhereyouarestanding rightnow,howmanytotalplaceson Earthareatlowtiderightnow?How manytotalplacesonEarthareathigh tiderightnow?a) b) c) a) a) 1and0 1and1 1and2 2and2 4and
Augustana - PH - 102
RCCircuitsPhysics102 ProfessorLeeCarkner Lecture15KirchhoffsRules+ I1 V=6V I2 6 I3 6 4Leftloop:66I2=0 6=6I2soI2=1A Rightloop:6I26I34I3=0 SinceI2=1,610I3=0,or6=10I3orI3=0.6A I1=I2+I3 I1=1+0.6orI1=1.6A Voltage:ForbatteryV=6V,for6,V=6I2=6V,for2
Augustana - PH - 102
Coulomb's LawPhysics 102 Professor Lee Carkner Lecture 93 m +5eForce on 2 from 1: F12 = kq1q2/r2PAL #8F12 2eF232.1 m +7eF12 = (8.99X109)(5)(1.6X1019)(2)(1.6X1019)/(32) = 2.56X1028 N Force is to left, make negative Force on 2 from 3: F23
Penn State - PHYS - 213
Physic 214 Laboratory Diffraction of Light Theory: Light that is incident upon a more slit will be diffracted and produce a diffraction pattern on a distant screen. If light with wavelength is incident upon a slit of width a, the light will interfer
Penn State - PHYS - 213
Interference of LightRefraction (a review) Character of the wave in different (transparent) media wave travels slower Index of refraction n = c/v frequency is constant (wavelength changes) Law of Refraction (Snells Law) n1 sin 1 = n2 sin 2
Penn State - PHYS - 213
Chapter 33-7 PolarizationThe Beginning of Optical Physics (Light and Optics)Transverse Wave Property (Electric Field Considered) Ancient ideaHistorical attempts to characterize light light emanates from eye to illuminate object Newton (18t
Penn State - PHYS - 212
Chapter 24 Electric PotentialRelationship between Work done by a force and ENERGY If you accelerate an object to a greater speed by applying a force you increase its kinetic energy These changes in KE are due to energy transfers: you transfer ene
Penn State - PHYS - 2
Chapter 9 Static Equilibrium; Elasticity and FractureEx. 9-7Units of Chapter 9The Conditions for Equilibrium Solving Statics Problems Applications to Muscles and Joints Stability and Balance Elasticity; Stress and Strain Fracture Spanning a Spac
Penn State - PHYS - 250
Chapter 9 Static Equilibrium; Elasticity and FractureEx. 9-7Units of Chapter 9The Conditions for Equilibrium Solving Statics Problems Applications to Muscles and Joints Stability and Balance Elasticity; Stress and Strain Fracture Spanning a Spac
Penn State - PHYS - 2
Chapter 6 Work and EnergyUnits of Chapter 6Work Done by a Constant Force Work Done by a Varying Force Kinetic Energy, and the Work-Energy Principle Potential Energy Conservative and Nonconservative Forces Mechanical Energy and Its Conservation Pro
Penn State - PHYS - 250
Chapter 6 Work and EnergyUnits of Chapter 6Work Done by a Constant Force Work Done by a Varying Force Kinetic Energy, and the Work-Energy Principle Potential Energy Conservative and Nonconservative Forces Mechanical Energy and Its Conservation Pro
Penn State - PHYS - 211
#2 The Study of Concurrent Forces with the Force TableApparatus: Force table with 4 pulleys, centering ring and string, 50 g weight hangers, slotted weights, protractors, and rulers. Discussion: The force table is designed to help you study the prop
Penn State - PHYS - 2
Chapter 4 Dynamics: Newtons Laws of MotionProb. 6 (#35 in book)Units of Chapter 4 Force Newtons First Law of Motion Mass Newtons Second Law of Motion Newtons Third Law of Motion Weight the Force of Gravity; and the Normal ForceUnits of C
Penn State - PHYS - 250
Chapter 4 Dynamics: Newtons Laws of MotionProb. 6 (#35 in book)Units of Chapter 4 Force Newtons First Law of Motion Mass Newtons Second Law of Motion Newtons Third Law of Motion Weight the Force of Gravity; and the Normal ForceUnits of C
Penn State - PHYS - 211
DYNAMICSSources of Motion (Newton's Laws of Motion)Isaac Newton 1642-1727Develops his three laws and calculus to explain the theory of planetary motion introducing gravity as the cause! Introduces a quantitative description of the causes of motio
Penn State - PHYS - 213
Physics 213 Spring 2009Dr. Leonard GambergAssociate Professor email: lpg10@psu.edu Office Luerssen-122-B Hrs. Tues, Wed 5-6pm or by appointment Phone: 610-396-6124 Fax: 610-396-6024 Course Web-stite: http:/hadron2.bk.psu.edu/ Class Schedule Mon, We
Penn State - PHYS - 211
Motion in 1-D Problem SolvingThe Major Player Isaac Newton 1642-1727 Develops Calculus to explain the theory of Mechanics F = maKinematics Dynamics We begin here in 1-DMike Gallis PSU.SL-Constant AccelerationWhen Solving a problemMake a
Penn State - PHYS - 213
Optical Instruments Telescopes Compound lens problem1 1 1 = + f ob iob pob 1 1 1 = + f eye ieye peyeObject at focal point of converging lens puts a virtual image at infinityOptics of TelescopeNewtonian Reflectorf ob m = - f eyeReflectors
Penn State - PHYS - 212
EXPERIMENTS 1 &amp; 2: ELECTRIC FIELD MAPPINGNOTE: The procedure for Exp. 1 begins on page 2 and the procedure for Exp. 2 begins on page 5.Object: To determine the nature of the electric field and equipotentials of a dipole and the relationship between
Augustana - PH - 313
StatisticalMechanicsPart1Physics313 ProfessorLeeCarkner Lecture251KineticTheory Thermodynamicpropertiesofagasaredue tomotionsoflargenumbersofgas molecules Thebehavioroftheensembleisgoverned bystatistics Theparticlesbehaveinarandomfashion
Augustana - PH - 316
PH316AUGUSTANA COLLEGEWINTER 2006-2007Deep Impact: How much time would we have to prepare? T. S. Grimes &amp; R. S. Kruidenier INTRODUCTION When considering the scenario of a possible earth impact, our eyes automatically turn to the moon. If such a
Penn State - PHYS - 2
#6 Uniform Circular MotionOBJECTIVE: To study the motion of an object undergoing uniform circular motion. DISCUSSION: An object undergoing uniform circular motion (moving with constant speed along the circumference of a circle) experiences a centrip
Penn State - PHYS - 250
#6 Uniform Circular MotionOBJECTIVE: To study the motion of an object undergoing uniform circular motion. DISCUSSION: An object undergoing uniform circular motion (moving with constant speed along the circumference of a circle) experiences a centrip
Augustana - PH - 316
Project 2: Ball on a rotating rodRyan Kruidenier Tom GrimesProblem Statement: The system treated in this problem involved a ball on a massless rod that started with an initial velocity. Using a variable ball mass, rod length, and damping constant
Penn State - PHYS - 2
Chapter 7 Linear MomentumUnits of Chapter 7Momentum and Its Relation to Force Conservation of Momentum Collisions and Impulse Conservation of Energy and Momentum in Collisions Elastic Collisions in One DimensionUnits of Chapter 7Inelastic Coll
Penn State - PHYS - 250
Chapter 7 Linear MomentumUnits of Chapter 7Momentum and Its Relation to Force Conservation of Momentum Collisions and Impulse Conservation of Energy and Momentum in Collisions Elastic Collisions in One DimensionUnits of Chapter 7Inelastic Coll
Penn State - PHYS - 2
Chapter 19 DC CircuitsUnits of Chapter 19 EMF and Terminal Voltage Resistors in Series and in Parallel Kirchhoff's Rules EMFs in Series and in Parallel; Charging a Battery Circuits Containing Capacitors in Series and in ParallelUnits of Chap
Penn State - PHYS - 250
Chapter 19 DC CircuitsUnits of Chapter 19 EMF and Terminal Voltage Resistors in Series and in Parallel Kirchhoff's Rules EMFs in Series and in Parallel; Charging a Battery Circuits Containing Capacitors in Series and in ParallelUnits of Chap
Penn State - PHYS - 2
Physics 250 Experiment #8 CONSERVATION OF MOMENTUM IN A TWO-DIMENSIONAL COLLISION Objective To verify the principle of conservation of linear momentum in a collision. Note about terms and notation: The following notation is used in these instructions
Penn State - PHYS - 250
Physics 250 Experiment #8 CONSERVATION OF MOMENTUM IN A TWO-DIMENSIONAL COLLISION Objective To verify the principle of conservation of linear momentum in a collision. Note about terms and notation: The following notation is used in these instructions
Penn State - PHYS - 2
#11 Simple Harmonic Motion ExperimentIn this experiment, a motion sensor is used to measure the position of an oscillating mass as a function of time. The frequency of oscillations will be obtained by measuring the velocity and acceleration of the o
Penn State - PHYS - 250
#11 Simple Harmonic Motion ExperimentIn this experiment, a motion sensor is used to measure the position of an oscillating mass as a function of time. The frequency of oscillations will be obtained by measuring the velocity and acceleration of the o
Penn State - PHYS - 2
Chapter 22 Electromagnetic WavesUnits of Chapter 22 Changing Electric Fields Produce Magnetic Fields; Maxwell's Equations Production of Electromagnetic Waves Light as an Electromagnetic Wave and the Electromagnetic Spectrum Measuring the Speed
Penn State - PHYS - 250
Chapter 22 Electromagnetic WavesUnits of Chapter 22 Changing Electric Fields Produce Magnetic Fields; Maxwell's Equations Production of Electromagnetic Waves Light as an Electromagnetic Wave and the Electromagnetic Spectrum Measuring the Speed
Penn State - PHYS - 212
Chapter 25CapacitanceReal Parallel PlatesChapter 25 CAPACITANCE Depends on geometry and materials Units Farad = Coulomb/Volt [F = C/V] ( F = 10-6 F) and picofarad (pF = 10-12 F) Examples Parallel Plates Coaxial Conductors (cylindrical s
Augustana - PH - 202
WavesPhysics 202 Professor Lee Carkner Lecture 6 Suppose you are watching Jupiter's moon Io in a telescope. Where will Io appear to be moving fastest across the sky? a) When it is furthest away from Jupiter a) When it is closest to Jupiter
Augustana - PH - 330
White DwarfsPhysical Astronomy Professor Lee Carkner Lecture 18Compact ObjectsW WTheir cores become compact objectsWWhite dwarf WNeutron star WBlack holeW WPhysically small and thus low luminosityWOften observable due to mass transferSiriu
Augustana - PH - 313
Pure Substances Part 1Physics 313 Professor Lee Carkner Lecture 20 1Substances A substance can exist as solid, liquid, gas or in a combination A pure substance is either: Composed of a single element A homogenous mixture of several elem
Augustana - PH - 313
IntroductionPhysics313 ProfessorLeeCarkner Lecture11WhatisThermodynamics? Hotandcoldandhowtheygetthatway ClassicalThermodynamics Temperature,heatandworkcanbetransformed intooneanother StatisticalPhysics Thebehaviorofparticlesisgovernedb
Augustana - PH - 102
HeatPhysics102 ProfessorLeeCarkner Lecture3Ifyoucantstandthe heat,getoutofthe kitchen. HarryS.TrumanPAL#2GalileoThermometerHowdoesitwork?LimitationsHeatWhatisheat? Sametemperature,noheatHeatusedtobethoughtofafluid(caloric)that co
Augustana - PH - 203
RL CircuitsPH 203 Professor Lee Carkner Lecture 21Which of the following would increase the inductance of a solenoid the most? A) Decreasing its length B) Increasing its current C) Decreasing the number of turns per meter D) Decreasing its cross
Augustana - PH - 203
MagnetsPH 203 Professor Lee Carkner Lecture 26Consider a Gaussian surface enclosing a the north pole of a bar magnet. The net magnetic flux through the surface is A) B) A) A) B) positive negative zero dependant on the size of the surface greater
Augustana - PH - 203
Electric FluxPH 203 Professor Lee Carkner Lecture 4HW 3, #1, HRW7, P 9l q2= - 4.50 q1 at x2 = 70 cm and q1 = 2.1 10-8 C at x1 = 20 cm, where is E = 0?+q1 E2 and E1both point right-q2 q2 &gt; q1 r2 &lt; r1 so E2 &gt; E1HW 3, #1, HRW7, P 9l q2= - 4
Augustana - PH - 203
Faraday's LawPH 203 Professor Lee Carkner Lecture 19Which of the following would increase the field inside of a solenoid the most? A) Increasing the length and increasing the number of turns B) Increasing the length and decreasing the number of t
Augustana - PH - 203
SolenoidsPH 203 Professor Lee Carkner Lecture 18A wire is carrying a current straight towards you. What is the direction of the magnetic field of the wire? A) B) C) D) straight towards you down up circling the wire in a clockwise direction A) cir
Penn State - PHYS - 2
Chapter 8 Rotational MotionUnits of Chapter 8Angular Quantities Constant Angular Acceleration Torque Rotational Dynamics; Torque and Rotational Inertia Solving Problems in Rotational DynamicsUnits of Chapter 8Rotational Kinetic Energy Angular M
Penn State - PHYS - 250
Chapter 8 Rotational MotionUnits of Chapter 8Angular Quantities Constant Angular Acceleration Torque Rotational Dynamics; Torque and Rotational Inertia Solving Problems in Rotational DynamicsUnits of Chapter 8Rotational Kinetic Energy Angular M
Penn State - PHYS - 211
Chapter 3 VectorsPhysics deals with many quantities that have both Size Direction VECTORS !y x r (x,y) (r,)E.g. Displacement, Velocity, Acceleration, Force, Torquex and y components of motion are independent-&quot;LINEARITY&quot;Componets v x = v cos
Penn State - PHYS - 211
Kinetic Energy and Work Chapter 7Work Forces and Work Work and moving objectsKinetic Energy and WORK Energy associated with MOTION What causes MOTION? FORCES Therefore its no surprise there is a relationship between force and kinetic energy Units
Augustana - PH - 203
CurrentPH 203 Professor Lee Carkner Lecture 10Consider a pair of metal plates separated by an air gap that acts as a capacitor. How could the amount of charge on the plates be increased for a given voltage? A) B) A) A) B) Replace the air with vac
Augustana - PH - 330
CosmologyPhysical Astronomy Professor Lee Carkner Lecture 25Hubble's LawC C Found the distance-redshift correlation known as Hubble's Law v = H0d CC The Wilkinson Microwave Anisotropy Probe (WMAP) launched in 2001 gives us: H0 = 71 km s-1 Mpc-
Penn State - PHYS - 211
DYNAMICS continuedSliding friction Two or more objects interacting ExamplesEXAMPLE 2 Inclined Plane ProblemA 2 kg block begins from rest and slides down a 15o frictionless incline. What is its acceleration?EXAMPLE 2 The Free Body DiagramNOTE
Penn State - PHYS - 212
Chapter 29 continued .Ampere's Law Andre Marie Ampere (1775-1836)Ampere's Lawr v B ds = oienclEnclosing a current carrying wire with a loop and taking the dot product of B and ds along that loop determines the amount of current enclosed by
Penn State - PHYS - 211
Rotation of a Rigid Body, Chapter 11Rolling Motion Torque Angular Momentum Conservation of Angular MomentumRolling MotionRolling without slippings = Rds d = =R dt dtvcomvcom = RKinetic Energy of Rolling Motion from the reference point P:
Augustana - PH - 203
Gauss's LawPH 203 Professor Lee Carkner Lecture 5A uniform electric field of magnitude 1 N/C is pointing in the positive y direction. If the cube has sides of 1 meter, what is the flux through sides A, B, C? A) A) A) B) C) 1, 0, 1 0, 0, 1 1, 0, 0
Augustana - AS - 311
The SunAstronomy 311 Professor Lee Carkner Lecture 23 What is responsible for creating a comet's tail?a) a) b) a) a) The solar wind The comet's motion Light pressure a and c only a, b, and cWhich of the following would you not expect to
Augustana - AS - 311
EarthAstronomy 311 Professor Lee Carkner Lecture 12 The high temperature of Venus is due to the lack of what compound?a) a) a) b) c) Carbon Dioxide Water Ammonia Sulfur Dioxide OxygenWhich of the following is not evidence for volcanism
Augustana - PH - 202
EnginesPhysics 202 Professor Lee Carkner Lecture 18 PAL #17 Entropy1 kg block of ice (at 0 C) melts in a 20 C roomS = Sice + Sroom Sice = Q/T = mL/T = [(1)(330000)]/(273) Sice = +1219.8 J/K (heat gained) Sroom = Q/T = 330000/293 Sroom = 1136
Augustana - AS - 311
The MoonAstronomy 311 Professor Lee Carkner Lecture 13Which of the following was not a constituent of the Earth's original atmosphere?a) b) c) d) a) Water Carbon Dioxide Ammonia Methane Sulfur DioxideWhy do we think the Earth's core is liqu