1 of 7 3/23/2010 2:45 PM


 Rebecca Norton
 1 years ago
 Views:
Transcription
1 1 of 7 3/23/2010 2:45 PM Chapter 30 Homework Due: 8:00am on Tuesday, March 23, 2010 Note: To understand how points are awarded, read your instructor's Grading Policy. [Return to Standard Assignment View] Electric Potential, Potential Energy, and Force Learning Goal: To review relationships among electric potential, electric potential energy, and force on a test charge This problem is a review of the relationship between an electric field, its associated electric potential, the electric potential energy, and the direction of force on a test charge. Electric field lines always begin at charges (or at infinity) and end at charges (or at infinity). One could also say that the lines we use to represent an electric field indicate the direction in which a test charge would initially move when released from rest. Which of the following fills in the three missing words correctly? (positive; negative; negative) (positive; negative; positive) (negative; positive; negative) (negative; positive; positive) Note that the electric field vector is everywhere tangent to the electric field lines. Like electric field lines, the electric field vector generally points away from positive charges and toward negative charges. Would a positive test charge released from rest move toward a region of higher or lower electric potential (compared to the electric potential at the point where it is released)? Potential, field, and force higher electric potential lower electric potential Now imagine that the sign of our test particle is changed from positive to negative, but the electric potential remains the same. Which of the following statements is correct? Hint C.1 Hint C.2 Direction of field and force Direction of force and potential energy gradient The direction of the force will change and it will point to regions of higher potential energy. The direction of the force will not change and it will point to regions of higher potential energy. The direction of the force will not change and it will point to regions of lower potential energy. The direction of the force will change and it will point to regions of lower potential energy. The electric field in a region of space is 1900, where is in meters. Problem What is the potential difference between and? 760 The electric potential in a region of space is , where and are in meters. Problem What is the strength of the electric field at? 1400
2 2 of 7 3/23/2010 2:45 PM What is the direction of the electric field at? Give the direction as an angle (in degrees) counterclockwise from the positive axis. 155 counterclockwise from the positive axis Capacitance: A Review Learning Goal: To review the meaning of capacitance and ways of changing the capacitance of a parallelplate capacitor. Capacitance is one of the central concepts in electrostatics. Understanding its meaning and the difference between its definition and the ways of calculating capacitance can be challenging at first. This tutorial is meant to help you become more comfortable with capacitance. Recall the fundamental formula for capacitance:, where is the capacitance in farads, is the charge stored on the plates in coulombs, and is the potential difference (or voltage) between the plates. In the following problems it may help to keep in mind that the voltage is related to the strength of the electric field and the distance between the plates,, by. What property of objects is best measured by their capacitance? the ability to conduct electric current the ability to distort an external electrostatic field the ability to store charge Capacitance is a measure of the ability of a system of two conductors to store electric charge and energy. It is defined as. This ratio remains constant as long as the system retains its geometry and the amount of dielectric does not change. Capacitors are special devices designed to combine a large capacitance with a small size. However, any pair of conductors separated by a dielectric (or vacuum) has some capacitance. Even an isolated electrode has a small capacitance. That is, if a charge is placed on it, its potential with respect to ground would change, and the ratio is its capacitance. Consider an airfilled charged capacitor. How can its capacitance be increased? What does capacitance depend on? Increase the charge on the capacitor. Decrease the charge on the capacitor. Increase the spacing between the plates of the capacitor. Decrease the spacing between the plates of the capacitor. Increase the length of the wires leading to the capacitor plates. Consider a charged parallelplate capacitor. How can its capacitance be halved? Check all that apply. Double the charge. Double the plate area. Double the plate separation. Halve the charge. Halve the plate area. Halve the plate separation. Part D Consider a charged parallelplate capacitor. Which combination of changes would quadruple its capacitance? Double the charge and double the plate area. Double the charge and double the plate separation. Halve the charge and double the plate separation. Halve the charge and double the plate area. Halve the plate separation and double the plate area. Double the plate separation and halve the plate area. Problem 30.19
3 3 of 7 3/23/2010 2:45 PM A switch that connects a battery to a capacitor is closed. Several seconds later you find that the capacitor plates are charged to. What is the emf of the battery? 3.00 Equivalent Capacitance Consider the combination of capacitors shown in the diagram, where 3.00, 11.0, 3.00, and Find the equivalent capacitance of the network of capacitors. Hint A.1 How to reduce the network of capacitors Hint A.2 Find the capacitance equivalent to,, and Hint A.3 Two capacitors in series Express your answer in microfarads Two capacitors of capacitance 6.00 and 3.00 are added to the network, as shown in the diagram. Find the equivalent capacitance of the new network of capacitors. How to reduce the extended network of capacitors Hint B.2 Find the equivalent capacitance of,,,, and Hint B.3 Two capacitors in series Express your answer in microfarads Problem You need a capacitance of 50.0, but you don't happen to have a 50.0 capacitor. You do have a 75.0 capacitor. What additional capacitor do you need to produce a total capacitance of
4 4 of 7 3/23/2010 2:45 PM Should you join the two capacitors in parallel or in series? in parallel in series A Simple Network of Capacitors In the figure are shown three capacitors with capacitances. The capacitor network is connected to an applied potential. After the charges on the capacitors have reached their final values, the charge on the second capacitor is What is the charge on capacitor? Hint A.1 Hint A.2 Hint A.3 Hint A.4 How to approach the problem Series or parallel? Calculate the potential difference across the second capacitor Calculate the potential difference across the first capacitor, 80.0 What is the charge on capacitor? Hint B.2 Hint B.3 Hint B.4 How to approach the problem Series or parallel? Capacitors in series Calculate the total charge in the initial section Express your answer in microcoulombs to three significant figures. 120 What is the applied voltage,? Hint C.1 Hint C.2 Hint C.3 How to approach the problem Calculate the equivalent capacitance Find the total charge Express your answer in volts to three significant figures.
5 5 of 7 3/23/2010 2:45 PM 37.3 What are the charge on and the potential difference across each capacitor in the figure? Problem Part D 1.00 Part E 16.0 Part F 8.00 Problem The flash unit in a camera uses a 3.0 battery to charge a capacitor. The capacitor is then discharged through a flashlamp. The discharge takes, and the average power dissipated in the flashlamp is 10. What is the capacitance of the capacitor? 22.2 Problem Two diameter metal disks are separated by a thick piece of paper. (Dielectric constant for paper is, its dielectric strength is.) What is the capacitance? 0.24
6 6 of 7 3/23/2010 2:45 PM What is the maximum potential difference between the disks? 3.7 The Capacitor as an EnergyStoring Device Learning Goal: To understand that the charge stored by capacitors represents energy; to be able to calculate the stored energy and its changes under different circumstances. An airfilled parallelplate capacitor has plate area and plate separation. The capacitor is connected to a battery that creates a constant voltage. Find the energy Hint A.1 stored in the capacitor. Formula for the energy of a capacitor Express your answer in terms of,,, and. Remember to enter as epsilon_0. The capacitor is now disconnected from the battery, and the plates of the capacitor are then slowly pulled apart until the separation reaches. Find the new energy of the capacitor after this process. What quantity remains constant? What characteristic of the capacitor does not change in this process? charge voltage between the plates capacitance energy In particular, look carefully at the quantities that do change. Hint B.2 What is the charge Find the charge on the capacitor that resides on the plates of the capacitor? Express your answer in terms of some or all of the variables,, and. Remember to enter as epsilon_0. Hint B.3 How does the capacitance change? How does the capacitance change in this process? remains constant increases by a factor of 3 decreases by a factor of 3 increases by a factor of 9 decreases by a factor of 9 Hint B.4 What is the formula for the energy? Which of the following formulas is most useful in finding for this situation? Express your answer in terms of,,, and.
7 7 of 7 3/23/2010 2:45 PM The increase in energy of the capacitor comes from the external work that must be done to pull the plates apart. Keep in mind that the plates have opposite charges and attract each other; some work must be done by an external agent to pull them apart. The capacitor is now reconnected to the battery, and the plate separation is restored to. A dielectric plate is slowly moved into the capacitor until the entire space between the plates is filled. Find the energy the dielectricfilled capacitor. The capacitor remains connected to the battery. The dielectric constant is. of Express your answer in terms of,,,, and. Score Summary: Your score on this assignment is 111.3%. You received out of a possible total of 75 points, plus 9.68 points of extra credit.
Fall 12 PHY 122 Homework Solutions #4
Fall 12 PHY 122 Homework Solutions #4 Chapter 23 Problem 45 Calculate the electric potential due to a tiny dipole whose dipole moment is 4.8 x 1030 C.m at a point 4.1 x 109 m away if this point is (a)
More informationphysics 111N electric potential and capacitance
physics 111N electric potential and capacitance electric potential energy consider a uniform electric field (e.g. from parallel plates) note the analogy to gravitational force near the surface of the Earth
More information1 of 8 3/30/2010 2:18 PM
1 of 8 3/30/2010 2:18 PM Chapter 32 Homework Due: 8:00am on Tuesday, March 30, 2010 Note: To understand how points are awarded, read your instructor's Grading Policy. [Return to Standard Assignment View]
More informationChapter 26. Capacitance and Dielectrics
Chapter 26 Capacitance and Dielectrics Capacitors Capacitors are devices that store electric charge Examples where capacitors are used: radio receivers filters in power supplies energystoring devices
More informationQ24.1 The two conductors a and b are insulated from each other, forming a capacitor. You increase the charge on a to +2Q and increase the charge on b
Q24.1 The two conductors a and b are insulated from each other, forming a capacitor. You increase the charge on a to +2Q and increase the charge on b to 2Q, while keeping the conductors in the same positions.
More informationKirchhoff's Rules and Applying Them
[ Assignment View ] [ Eðlisfræði 2, vor 2007 26. DC Circuits Assignment is due at 2:00am on Wednesday, February 21, 2007 Credit for problems submitted late will decrease to 0% after the deadline has passed.
More informationMeasurement of Capacitance
Measurement of Capacitance PreLab Questions Page Name: Class: Roster Number: Instructor:. A capacitor is used to store. 2. What is the SI unit for capacitance? 3. A capacitor basically consists of two
More informationCapacitance, Resistance, DC Circuits
This test covers capacitance, electrical current, resistance, emf, electrical power, Ohm s Law, Kirchhoff s Rules, and RC Circuits, with some problems requiring a knowledge of basic calculus. Part I. Multiple
More informationPhysics 210 Q ( PHYSICS210BRIDGE ) My Courses Course Settings
1 of 16 9/7/2012 1:10 PM Logged in as Julie Alexander, Instructor Help Log Out Physics 210 Q1 2012 ( PHYSICS210BRIDGE ) My Courses Course Settings Course Home Assignments Roster Gradebook Item Library
More informationPhysics 1653 Exam 3  Review Questions
Physics 1653 Exam 3  Review Questions 3.0 Two uncharged conducting spheres, A and B, are suspended from insulating threads so that they touch each other. While a negatively charged rod is held near, but
More informationPSS 27.2 The Electric Field of a Continuous Distribution of Charge
Chapter 27 Solutions PSS 27.2 The Electric Field of a Continuous Distribution of Charge Description: Knight ProblemSolving Strategy 27.2 The Electric Field of a Continuous Distribution of Charge is illustrated.
More informationObjectives for the standardized exam
III. ELECTRICITY AND MAGNETISM A. Electrostatics 1. Charge and Coulomb s Law a) Students should understand the concept of electric charge, so they can: (1) Describe the types of charge and the attraction
More informationRVRUSA LCC. Capacitance & Capacitors (Bogart, page 285)
Capacitance & Capacitors (Bogart, page 285) Capacitance is a measure of a component s ability to store charge. A capacitor is a device specially designed to have a certain amount of capacitance. This ability
More informationExperiment 9 ~ RC Circuits
Experiment 9 ~ RC Circuits Objective: This experiment will introduce you to the properties of circuits that contain both resistors AND capacitors. Equipment: 18 volt power supply, two capacitors (8 µf
More informationElectrical Energy, Potential and Capacitance. AP Physics B
Electrical Energy, Potential and Capacitance AP Physics B Electric Fields and WORK In order to bring two like charges near each other work must be done. In order to separate two opposite charges, work
More informationCapacitance and Dielectrics. Physics 231 Lecture 41
apacitance and Dielectrics Physics 3 Lecture 4 apacitors Device for storing electrical energy which can then be released in a controlled manner onsists of two conductors, carrying charges of q and q,
More informationExam 1 Solutions. PHY2054 Fall 2014. Prof. Paul Avery Prof. Andrey Korytov Sep. 26, 2014
Exam 1 Solutions Prof. Paul Avery Prof. Andrey Korytov Sep. 26, 2014 1. Charges are arranged on an equilateral triangle of side 5 cm as shown in the diagram. Given that q 1 = 5 µc and q 2 = q 3 = 2 µc
More information1 of 8 2/25/2010 5:32 PM
Chapter 26 Homework Due: 8:00am on Monday, February 22, 2010 Note: To understand how points are awarded, read your instructor's Grading Policy. [Return to Standard Assignment View] Charging a Conducting
More informationAP Physics Capacitance & Dielectrics; Current & Resistance; D.C. Circuits
A hysics Capacitance & Dielectrics; Current & esistance; D.C. Circuits art I. Multiple Choice (4 points each) Choose the one best answer to each of the following problems. 1 (A). A parallelplate capacitor
More informationElectrostatics Problems
Name AP Physics B Electrostatics Problems Date Mrs. Kelly 1. How many excess electrons are contained in a charge of 30 C? 2. Calculate and compare the gravitational and electrostatic force between an electron
More informationEðlisfræði 2, vor 2007
[ Assignment View ] [ Pri Eðlisfræði 2, vor 2007 31. Alternating Current Circuits Assignment is due at 2:00am on Wednesday, March 21, 2007 Credit for problems submitted late will decrease to 0% after the
More informationElectrostaticsE Field
1. Which diagram represents the electric field lines between two small electrically charged spheres? 2. Which graph best represents the relationship between the magnitude of the electric field strength,
More informationCLASS TEST GRADE 11. PHYSICAL SCIENCES: PHYSICS Test 3: Electricity and magnetism
CLASS TEST GRADE 11 PHYSICAL SCIENCES: PHYSICS Test 3: Electricity and magnetism MARKS: 45 TIME: 1 hour INSTRUCTIONS AND INFORMATION 1. Answer ALL the questions. 2. You may use nonprogrammable calculators.
More informationObjectives. Capacitors 262 CHAPTER 5 ENERGY
Objectives Describe a capacitor. Explain how a capacitor stores energy. Define capacitance. Calculate the electrical energy stored in a capacitor. Describe an inductor. Explain how an inductor stores energy.
More informationPreLab 7 Assignment: Capacitors and RC Circuits
Name: Lab Partners: Date: PreLab 7 Assignment: Capacitors and RC Circuits (Due at the beginning of lab) Directions: Read over the Lab Handout and then answer the following questions about the procedures.
More informationPHYS2020: General Physics II Course Lecture Notes Section II
PHYS2020: General Physics II Course Lecture Notes Section II Dr. Donald G. Luttermoser East Tennessee State University Edition 4.0 Abstract These class notes are designed for use of the instructor and
More informationLAB 4: CAPACITORS AND RC CIRCUITS
1 Name Date Partner(s) OBJECTIVES LAB 4: CAPACITORS AND RC CIRCUITS! To define capacitance and to learn to measure it with a digital multimeter.! To discover how the capacitance of conducting parallel
More informationLesson 6 Capacitors and Capacitance Lawrence B. Rees 2007. You may make a single copy of this document for personal use without written permission.
Lesson 6 apacitors and apacitance Lawrence B. Rees 7. You may make a single copy of this document for personal use without written permission. 6. Introduction In 745 Pieter van Musschenbroek, while trying
More informationEpisode 126: Capacitance and the equation C =Q/V
Episode 126: Capacitance and the equation C =Q/V Having established that there is charge on each capacitor plate, the next stage is to establish the relationship between charge and potential difference
More informationCapacitors Lab. In order to investigate electric fields you will need the following equipment. Homemade parallel capacitor with wax paper in between
Capacitors Lab 1 Equipment In order to investigate electric fields you will need the following equipment Homemade parallel capacitor with wax paper in between DC voltage supply Electrometer Variable capacitor
More informationResistorCapacitor (RC) Circuits
ResistorCapacitor (RC) Circuits Introduction In this second exercise dealing with electrical circuitry, you will work mainly with capacitors, which are devices that are used to store charge for later
More informationCAPACITIVE REACTANCE. We have already discussed the operation of a capacitor in a DC circuit, however let's just go over the main principles again.
Reading 13 Ron Bertrand VK2DQ http://www.radioelectronicschool.com CAPACITOR IN A DC CIRCUIT CAPACITIVE REACTANCE We have already discussed the operation of a capacitor in a DC circuit, however let's just
More informationLab 4  Capacitors & RC Circuits
Lab 4 Capacitors & RC Circuits L41 Name Date Partners Lab 4 Capacitors & RC Circuits OBJECTIVES To define capacitance and to learn to measure it with a digital multimeter. To explore how the capacitance
More informationCHAPTER 14  CAPACITORS QUESTION & PROBLEM SOLUTIONS
Solutionsh 14 (apacitors) HAPTER 14  APAITORS QUESTION & PROBLEM SOLUTIONS 141) You have a power supply whose low voltage plate A plate B "ground" terminal is attached to a resistor whose R resistance
More informationPhysics II Exam 2 Review
Physics II Exam 2 Review Christopher Lane 1,2 Justin Lucas 1,3 Julia Bielaski 1,2 1 Department Physics, Clarkson University 2 Department Mathematics, Clarkson University 3 Department Electrical and Computer
More informations_5xut Page 1 Physics Samples
Physics Samples E&M Unit 1. Two metal spheres having charges of +4.0 x 10 6 coulomb and +2.0 x 10 5 coulomb, respectively, are brought into contact and then separated. After separation, the charge on each
More informationElectricity and Water Analogy
[ Assignment View ] [ Eðlisfræði 2, vor 2007 25. Current, Resistance, and Electromagnetic Force Assignment is due at 2:00am on Wednesday, February 14, 2007 Credit for problems submitted late will decrease
More informationChapter 11. Circuits
Chapter 11 Circuits 376 377 AP Physics Multiple Choice Practice Circuits 1. Multiple Correct. Which two arrangements of resistors shown above have the same resistance between the terminals? Select two
More informationUNIT 24: CAPACITORS AND RC CIRCUITS Approximate Time Two 100minute Sessions
Name St.No.  Date(YY/MM/DD) / / Section Group # UNIT 24: CAPACITORS AND RC CIRCUITS Approximate Time Two 100minute Sessions + + + +     The most universal and significant concept to come out of the
More informationELECTROSTATICS. Ans: It is a fundamental property of matter which is responsible for all electrical effects
ELECTROSTATICS One Marks Questions with Answers: 1.What is an electric charge? Ans: It is a fundamental property of matter which is responsible for all electrical effects 2. Write the SI unit of charge?
More informationJanuary 30. Physics 272. Spring Prof. Philip von Doetinchem
Physics 272 January 30 Spring 2014 http://www.phys.hawaii.edu/~philipvd/pvd_14_spring_272_uhm.html Prof. Philip von Doetinchem philipvd@hawaii.edu Phys272  Spring 14  von Doetinchem  140 Summary General
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) If the voltage at a point in space is zero, then the electric field must be A) zero. B) positive.
More informationCapacitors. We charge a capacitor by connecting the two plates to a potential difference, such as a battery:
RC Circuits PHYS 1112L Capacitors A capacitor is an electrical component that stores charge. The simplest capacitor is just two charged metal plates separated by a nonconducting material: In the diagram
More informationChapter 25: Capacitance
Chapter 25: Capacitance Most of the fundamental ideas of science are essentially simple, and may, as a rule, be expressed in a language comprehensible to everyone. Albert Einstein 25.1 Introduction Whenever
More informationPhysics 122 (Sonnenfeld), Spring 2013 ( MPSONNENFELDS2013 ) My Courses Course Settings
Signed in as Richard Sonnenfeld, Instructor Help Sign Out Physics 122 (Sonnenfeld), Spring 2013 ( MPSONNENFELDS2013 ) My Courses Course Settings Course Home Assignments Roster Gradebook Item Library Essential
More information4/16/ Bertrand
Physics B AP Review: Electricity and Magnetism Name: Charge (Q or q, unit: Coulomb) Comes in + and The proton has a charge of e. The electron has a charge of e. e = 1.602 1019 Coulombs. Charge distribution
More informationEDEXCEL NATIONAL CERTIFICATE/DIPLOMA UNIT 5  ELECTRICAL AND ELECTRONIC PRINCIPLES NQF LEVEL 3 OUTCOME 2  CAPACITANCE
EDEXCEL NATIONAL CERTIFICATE/DIPLOMA UNIT 5  ELECTRICAL AND ELECTRONIC PRINCIPLES NQF LEVEL 3 OUTCOME 2  CAPACITANCE 2 Understand the concepts of capacitance and determine capacitance values in DC circuits
More informationEE301 Lesson 14 Reading: 10.110.4, 10.1110.12, 11.111.4 and 11.1111.13
CAPACITORS AND INDUCTORS Learning Objectives EE301 Lesson 14 a. Define capacitance and state its symbol and unit of measurement. b. Predict the capacitance of a parallel plate capacitor. c. Analyze how
More informationPeople s Physics Book
The Big Idea When current flows through wires and resistors in a circuit as a result of an electric potential, charge does not build up significantly anywhere on the path. Capacitors are devices placed
More informationCoefficient of Potential and Capacitance
Coefficient of Potential and Capacitance Lecture 12: Electromagnetic Theory Professor D. K. Ghosh, Physics Department, I.I.T., Bombay We know that inside a conductor there is no electric field and that
More informationMore Concepts. I = dq. Current is the rate of flow of charge around a circuit.
RC Circuits In this presentation, circuits with multiple batteries, resistors and capacitors will be reduced to an equivalent system with a single battery, a single resistor, and a single capacitor. Kirchoff's
More informationPHYSICS 200 CLASS 12 SPRING 2004 (11 February 04) CONCEPTS: 1. Capacitor as a device for storing electric charge
PHYSICS 200 CLASS 12 SPRING 2004 (11 February 04) ASSIGNMENT: HRW, Chapter 26 CONCEPTS: 1. Capacitor as a device for storing electric charge 2. The ability of a capacitor to store charge depends on its
More informationExercises on Voltage, Capacitance and Circuits. A d = (8.85 10 12 ) π(0.05)2 = 6.95 10 11 F
Exercises on Voltage, Capacitance and Circuits Exercise 1.1 Instead of buying a capacitor, you decide to make one. Your capacitor consists of two circular metal plates, each with a radius of 5 cm. The
More informationStoring And Releasing Charge In A Circuit
Storing And Releasing Charge In A Circuit Topic The characteristics of capacitors Introduction A capacitor is a device that can retain and release an electric charge, and is used in many circuits. There
More informationProblem Solving 4: Capacitance, Stored Energy, Capacitors in Parallel and Series, Dielectrics
Problem Solving 4: Capacitance, Stored Energy, Capacitors in Parallel and Series, Dielectrics Section Table Names Hand in one copy per group at the end of the Friday Problem Solving Session. OBJECTIVES
More informationResistor Capacitor (RC) Circuits
Resistor Capacitor (RC) Circuits So far, we know how to handle resistors in a circuit: What happens when the switch is closed? A steady current flows in the circuit What happens if we also put a capacitor
More informationParallel Plate Capacitor
Parallel Plate Capacitor Capacitor Charge, Plate Separation, and Voltage A capacitor is used to store electric charge. The more voltage (electrical pressure) you apply to the capacitor, the more charge
More informationChapter 18 Electric Current and Circuits
Chapter 18 Electric Current and Circuits 3. When a current flows down a wire: A. electrons are moving in the direction of the current. B. electrons are moving opposite the direction of the current. C.
More informationLab 5 RC Circuits: Charge Changing in Time Observing the way capacitors in RC circuits charge and discharge.
Print Your Name Lab 5 RC Circuits: Charge Changing in Time Observing the way capacitors in RC circuits charge and discharge. Print Your Partners' Names Instructions October 15, 2015October 13, 2015 Read
More information1) 10. V 2) 20. V 3) 110 V 4) 220 V
1. The diagram below represents an electric circuit consisting of a 12volt battery, a 3.0ohm resistor, R 1, and a variable resistor, R 2. 3. What is the total resistance of the circuit 1) 6.6 Ω 2) 10
More informationForce on Moving Charges in a Magnetic Field
[ Assignment View ] [ Eðlisfræði 2, vor 2007 27. Magnetic Field and Magnetic Forces Assignment is due at 2:00am on Wednesday, February 28, 2007 Credit for problems submitted late will decrease to 0% after
More informationPHYS2212 LAB Coulomb s Law and the Force between Charged Plates
PHYS2212 LAB Coulomb s Law and the Force between Charged Plates Objectives To investigate the electrostatic force between charged metal plates and determine the electric permittivity of free space, ε
More informationHomework 6 Solutions PHYS 212 Dr. Amir
Homework 6 Solutions PHYS Dr. Amir Chapter 5: 9. (II) A 00W lightbulb has a resistance of about Ω when cold (0 C) and 0 Ω when on (hot). Estimate the temperature of the filament when hot assuming an average
More information( )( 10!12 ( 0.01) 2 2 = 624 ( ) Exam 1 Solutions. Phy 2049 Fall 2011
Phy 49 Fall 11 Solutions 1. Three charges form an equilateral triangle of side length d = 1 cm. The top charge is q =  4 μc, while the bottom two are q1 = q = +1 μc. What is the magnitude of the net force
More informationUniversity Physics 227N/232N Current and Ohm s Law, Resistors, Circuits, and Kirchoff Lab this Friday, Feb 28 So NO QUIZ this Friday!
University Physics 227N/232N Current and Ohm s Law, Resistors, Circuits, and Kirchoff Lab this Friday, Feb 28 So NO QUIZ this Friday! Dr. Todd Satogata (ODU/Jefferson Lab) and Fred Miller satogata@jlab.org
More informationReading assignment: All students should read the Appendix about using oscilloscopes.
10. A ircuits* Objective: To learn how to analyze current and voltage relationships in alternating current (a.c.) circuits. You will use the method of phasors, or the vector addition of rotating vectors
More informationForces between charges
Forces between charges Two small objects each with a net charge of Q (where Q is a positive number) exert a force of magnitude F on each other. We replace one of the objects with another whose net charge
More information1 of 7 4/13/2010 8:05 PM
Chapter 33 Homework Due: 8:00am on Wednesday, April 7, 2010 Note: To understand how points are awarded, read your instructor's Grading Policy [Return to Standard Assignment View] Canceling a Magnetic Field
More informationCHAPTER 26 ELECTROSTATIC ENERGY AND CAPACITORS
CHAPTER 6 ELECTROSTATIC ENERGY AND CAPACITORS. Three point charges, each of +q, are moved from infinity to the vertices of an equilateral triangle of side l. How much work is required? The sentence preceding
More information3. As shown in the diagram below, a charged rod is held near, but not touching, a neutral electroscope.
1. As a positively charged rod is brought near to but not allowed to touch the knob of an uncharged electroscope, the leaves will diverge because negative charges are transferred from the electroscope
More informationPhysics 2212 GH Quiz #4 Solutions Spring 2015
Physics 1 GH Quiz #4 Solutions Spring 15 Fundamental Charge e = 1.6 1 19 C Mass of an Electron m e = 9.19 1 31 kg Coulomb constant K = 8.988 1 9 N m /C Vacuum Permittivity ϵ = 8.854 1 1 C /N m Earth s
More information14 Capacitors in Series & Parallel
hapter 4 apacitors in Series & Parallel 4 apacitors in Series & Parallel The method of eversimpler circuits that we used for circuits with more than one resistor can also be used for circuits having more
More informationOCR (A) specifications: 5.4.7a,b,c,d,e,f,g,h. Chapter 7 Capacitors
OCR (A) specifications: 5.4.7a,b,c,d,e,f,g,h Chapter 7 Capacitors Worksheet Worked examples Practical : Determining the capacitance of a parallelplate capacitor Practical 2: Determining the capacitance
More informationThe current that flows is determined by the potential difference across the conductor and the resistance of the conductor (Ohm s law): V = IR P = VI
PHYS1000 DC electric circuits 1 Electric circuits Electric current Charge can move freely in a conductor if an electric field is present; the moving charge is an electric current (SI unit is the ampere
More informationChapter 25 : Electric circuits
Chapter 25 : Electric circuits Voltage and current Series and parallel circuits Resistors and capacitors Kirchoff s rules for analysing circuits Electric circuits Closed loop of electrical components around
More information1 of 7 10/2/2009 1:13 PM
1 of 7 10/2/2009 1:13 PM Chapter 6 Homework Due: 9:00am on Monday, September 28, 2009 Note: To understand how points are awarded, read your instructor's Grading Policy. [Return to Standard Assignment View]
More informationPHYSICS LAB. Capacitor. Date: GRADE: PHYSICS DEPARTMENT JAMES MADISON UNIVERSITY. Revision November 2002. Capacitor 21
PHYSICS LAB Capacitor Printed Names: Signatures: Date: Lab Section: Instructor: GRADE: PHYSICS DEPARTMENT JAMES MADISON UNIVERSITY Revision November 2002 Capacitor 21 Blank page Capacitor 22 CHARGING AND
More informationPhysics 2220 Module 09 Homework
Physics 2220 Module 09 Homework 01. A potential difference of 0.050 V is developed across the 10cmlong wire of the figure as it moves though a magnetic field perpendicular to the page. What are the strength
More informationHW7 Solutions Notice numbers may change randomly in your assignments and you may have to recalculate solutions for your specific case.
HW7 Solutions Notice numbers may change randomly in your assignments and you may have to recalculate solutions for your specific case. Tipler 24.P.021 (a) Find the energy stored in a 20.00 nf capacitor
More informationChapter 18 Electric Forces and Electric Fields. Key Concepts:
Chapter 18 Lectures Monday, January 25, 2010 7:33 AM Chapter 18 Electric Forces and Electric Fields Key Concepts: electric charge principle of conservation of charge charge polarization, both permanent
More informationOHM S LAW 05 AUGUST 2014
OHM S LAW 05 AUGUST 2014 In this lesson, we: Current Lesson Description Revise the definitions of current, potential difference and emf Explore Ohm s law Identify the characteristics of ohmic and nonohmic
More informationElectrostatics. Electrostatics Version 2
1. A 150watt lightbulb is brighter than a 60.watt lightbulb when both are operating at a potential difference of 110 volts. Compared to the resistance of and the current drawn by the 150watt lightbulb,
More informationElectric Currents. Electric Potential Energy 11/23/16. Topic 5.1 Electric potential difference, current and resistance
Electric Currents Topic 5.1 Electric potential difference, current and resistance Electric Potential Energy l If you want to move a charge closer to a charged sphere you have to push against the repulsive
More informationElectric Field Mapping Lab 3. Precautions
HB 092507 Electric Field Mapping Lab 3 1 Electric Field Mapping Lab 3 Equipment mapping board, Uprobe, resistive boards, templates, dc voltmeter (431B), 4 long leads, 16 V dc for wall strip Reading
More informationCAUTION! A highquality capacitor can hold a charge for long periods of time.
CAUTION! A highquality capacitor can hold a charge for long periods of time. To prevent a painful shock, the capacitor must be discharged before its removal. What Is A Capacitor? For HVAC technicians,
More informationEquipotential and Electric Field Mapping
Experiment 1 Equipotential and Electric Field Mapping 1.1 Objectives 1. Determine the lines of constant electric potential for two simple configurations of oppositely charged conductors. 2. Determine the
More information2. In Newton s universal law of gravitation the masses are assumed to be. B. masses of planets. D. spherical masses.
Practice Test: 41 marks (55 minutes) Additional Problem: 19 marks (7 minutes) 1. A spherical planet of uniform density has three times the mass of the Earth and twice the average radius. The magnitude
More informationQ26.1 Which of the two arrangements shown has the smaller equivalent resistance between points a and b? A. the series arrangement B.
Q26.1 Which of the two arrangements shown has the smaller equivalent resistance between points a and b? A. the series arrangement B. the parallel arrangement C. The equivalent resistance is the same for
More informationFall 97 Test 1, P. 2
2102 Fall 97 Test 1 Fall 97 Test 1, P. 2 Fall 97 Test 1, P. 3 Fall 97 Test 1, P. 4 Fall 97 Test 1, P. 5 5. (10 points) A spherical rubber balloon has a charge uniformly distributed over is surface. The
More informationLooking at Capacitors
Module 2 AC Theory Looking at What you'll learn in Module 2: In section 2.1 Common capacitor types and their uses. Basic Circuit Symbols for. In section 2.2 Charge & Discharge How capacitors work. What
More informationELECTRIC FIELD LINES AND EQUIPOTENTIAL SURFACES
ELECTRIC FIELD LINES AND EQUIPOTENTIAL SURFACES The purpose of this lab session is to experimentally investigate the relation between electric field lines of force and equipotential surfaces in two dimensions.
More informationRC Circuits. Honors Physics Note 002 c Alex R. Dzierba Honors Physics P222  Spring, 2004
R ircuits Honors Physics Note 2 c Alex R. Dziera Honors Physics P222  Spring, 24 Introduction This note concerns the ehavior of circuits that include cominations of resistors, capacitors and possily a
More informationStudent Content Brief Advanced Level
Student Content Brief Advanced Level Electric Circuits Background Information There are a variety of forces acting on the body of the Sea Perch. One important force is pushing electrons through the wires
More informationGauss's Law. Gauss's Law in 3, 2, and 1 Dimension
[ Assignment View ] [ Eðlisfræði 2, vor 2007 22. Gauss' Law Assignment is due at 2:00am on Wednesday, January 31, 2007 Credit for problems submitted late will decrease to 0% after the deadline has passed.
More informationElectric Currents & DC Circuits
Slide 1 / 70 Slide 2 / 70 1 The length of an aluminum wire is quadrupled and the radius is doubled. y which factor does the resistance change? lectric urrents & ircuits 2 4 1/2 1/4 1 Slide 3 / 70 2 copper
More informationElectricity & Optics
Physics 24100 Electricity & Optics Lecture 9 Chapter 24 sec. 35 Fall 2012 Semester Matthew Jones Thursday s Clicker Question To double the capacitance of a parallel plate capacitor, you should: (a) Double
More informationSQA Advanced Higher Physics Unit 2: Electrical Phenomena
SCHOLAR Study Guide SQA Advanced Higher Physics Unit 2: Electrical Phenomena Andrew Tookey HeriotWatt University Campbell White Tynecastle High School HeriotWatt University Edinburgh EH14 4AS, United
More information1 of 9 2/9/2010 3:38 PM
1 of 9 2/9/2010 3:38 PM Chapter 23 Homework Due: 8:00am on Monday, February 8, 2010 Note: To understand how points are awarded, read your instructor's Grading Policy. [Return to Standard Assignment View]
More informationBasic Electricity Notes
Basic Electricity Notes EVERYTHING IS MADE OF ATOMS Imagine a pure gold ring. Divide it in half and give one of the halves away. Keep dividing and dividing and dividing. Soon you will have a piece so small
More informationA2 Physics  Electric Fields Q&A Revision Sheet
Give the equation relating to the force between point charges in a vacuum If 'F' (the force) is negative what does that mean? If 'F' (the force) is positive what does that mean? State Coulomb's Law F is
More information