Electric Potential Energy & Electric Potential
|
|
- Morgan Holmes
- 5 years ago
- Views:
Transcription
1 Electric Potential Energy & Electric Potential
2 Consider the following scenario. F E F E pt.a If we release the ve charge from pt.a The ELECTRIC FIELD produced by the ve charge pulls the ve charge to the left because opposites attract!
3 F E What if we want to move the charge to pt. B? F E pt.a d pt.b WORK! ENERGY! Where did the energy go?? There already is a force being exerted to the left by the electric field created by the ve charge In order to move a charge from pt.a pt.b, we need to exert a FORCE OVER A DISTANCE to the right
4 Let s refer back to gravity. Gravitational Potential Energy Pt. B is at a Higher Potential than Pt. A in the Gravitational Field pt.b pt.a F g ENERGY! WORK! In order to move a mass from pt.a pt.b we need to exert a FORCE OVER A DISTANCE The same concept applies electrically!!! Where did the energy go??
5 Defining Electric Potential Energy F E F E pt.a pt.b Higher Electrical Potential Energy There s a difference between pt.a & pt.b in the field Pt. B represents higher ELECTRIC POTENTIAL ENERGY in the electric field than Pt. A Remember energy is conserved!!!
6 Comparing Laws Gravitational Forces Electrical Forces F G = GMm F E = kq 1 q 2 r 2 r 2 F g = mg F E = qe E g = GMm r E E = kq 1 q 2 r Electric potential energy is stored by 2 separated charges just as gravitational potential energy is stored by 2 separated masses but E E can be for charges that either attract or repel
7 Electric Potential Energy If work is done by the electric force on a charge: W = F E d W = qε d then E E = W To calculate energy stored in a system of 2 charges a distance r apart: E E = kq 1q 2 r ***Include signs of charges when calculating E E NOTE: E E is a scalar quantity measured in J; W and E E are independent of the path taken by a charge as F E is a conservative force like F g.
8 Electric Potential Energy When 2 charges are ALIKE, E E is ve for repulsion. As work is done on the system to bring the opposing charges together, r and E E is stored. As r, E E, E k.. When 2 charges are OPPOSITE, EE is ve for attraction. Work is not done on the system to bring the opposing charges together; they will move towards each other naturally as work is done by the charges, r and E E. Greater E E means E k. If work was done to separate the charges, r and E E would becoming less negative. *Attraction is similar to E g graph. As r E E 0
9 Summary of E E When work is done against the natural tendency of the charges E E as W = E When calculating E E include the sign of the charge to indicate whether work (W) is done on the system ve (energy is added; E E ) or ve (energy is lost to kinetic energy and other forms as E E ) If W is ve, then charges are alike and want to repel; if W is ve charges are opposite and attract each other
10 Summary of E E If the charges are LIKE (, or,) E E is POSITIVE (ve work is done on the system against the electric field by moving charges closer together) If the charges are OPPOSITE (,) E E is NEGATIVE (ve work is done by the electric field to separate charges as E E other forms of energy in the system) For charge separation as r E E ZERO
11 Reality Check: What is this useful for?!?! Inkjet printers TVs and computer monitors Understanding the human body (giant electric circuit) Xrays, EKGs Radiation therapy Particle accelerators
12 Example 1 a)calculate the electric potential energy stored between two protons in a helium nucleus if the charge of the protons is q=1.602x10 19 C and they are 3.0x10 16 m apart. b)what is the electric force between the protons?
13 Gravitational Potential Energy F g If we release a mass from a point of high E g, as it falls it loses E g transferred into E K or useful work Same applies for Electric Potential Energy!
14 Electric Potential Energy Charges moving from higher potential energy lower potential energy = USEFUL ENERGY
15 Electric Potential F E F E pt.a pt.b Difference in Potential Energy per charge = ELECTRIC POTENTIAL No matter how much charge we move, each Coulomb of charge (q) will undergo THE SAME change in Electrical Potential Energy E E = ELECTRICAL POTENTIAL
16 Electric Potential Electric Potential Energy per unit positive test charge = ELECTRIC POTENTIAL V = E E q V = Electric Potential (J/C or Volts,V) E E = Electrical Potential Energy (J) q = magnitude of the test charge (C) ***Include signs when calculating V Electric potential is also measured in electron volts where 1eV = 1.602x10 19 C x 1V = 1.602x10 19 J 1V is the electric potential at a given point in an electric field if 1J of work is required to move 1C of charge from infinity to that point or from one point to another V = 0 at infinity as E E = 0 at infinity (reference pt.)
17 Electric Potential Difference Electric Potential Difference = the amount of work required per unit test charge to move a ve charge from one pt. to another pt. in the presence of an electric field If the charge is moving in the direction of the field, the electric potential decreases and is converted into kinetic energy and thermal energy If the charge is moving in the direction against the field, the electric potential increases as work is done against the force of the field thereby increasing E E.
18 Electric Potential E E = kq 1 q 2 r V = E E q V = kq 1 r DE E = qdv Electric potential can also be measured a distance r from a main point charge q 1 ; note q 2 =q (ve test charge) Electric Potential Change in Energy (work done) in terms of the Potential Difference between any 2 points may also be calculated; NOTE: W = E E ; V is used for 1 pt. whereas V is between 2 pts.
19 Parallel Plates A B Special Case: parallel plates uniform ε If work is done to move a charge q from pt B to pt A then: W = Fd = qεd Since E E = W then qv = qεd and V = εd where d = r Electric Field: Decreasing potential
20 Parallel Plates e = DV r Note: Since e is uniform then DV r Units = V/m = J/C/m = N m/c m = N/C V if work is done to move a charge against the electric field This is for the magnitude of the electric field at any point in the space between two parallel plates a distance r apart with potential difference V The difference in potential energy per charge depends directly upon the charge s position in the field
21 Example 2 How much work must be done to increase the electric potential of a charge of 3.0x10 7 C by 120 V?
22 Example 3 The plate separation in a capacitor is 15x10 6 m. If a 9.0V battery is connected to the capacitor, what is the magnitude of the electric field intensity within the capacitor? *A capacitor is a twoterminal electrical component used to store energy in an electric field. It is used in electrical circuits.
23 Example 4 A small sphere has a charge of 3.0x10 6 C. Point X is located 60.0cm from the charge. a)find the electric potential at Point X. b)a charge of 2.0x10 6 C is placed at X. What is its electric potential energy? c)how much work was done in moving the 2.0x10 6 C charge from infinity to X?
24 Motion of Charged Particles in Electric Fields Consider 2 charges where q 2 is a main charge and q 1 is a smaller charge. If the charge is allowed to freely move, q 1 will move to the right due to the force of repulsion. It will accelerate to the right in the direction of the electric force as predicted by Newton s 2 nd Law. a = F E m But as the charge moves r, F E and a will too. the motion of a particle is difficult to analyse using Newton s Laws directly
25 Conservation of Energy in Electric Fields The total energy of the charges remains constant even though the distance between them changes. When q 1 is at r 1, q 1 is at rest so the total energy of the charged mass equals electric potential energy
26 Conservation of Energy in Electric Fields For 2 Like Charges: When charges move farther apart, E E is lost and becomes E K. E E = E K When you bring charges closer together, E K is lost and is stored as E E. E K = E E For 2 Opposite charges, the opposite happens.
27 Example 5 Find the speed of a 220 g puck on an air hockey table with a charge of 4.50 μc when it is 55.0 cm from a fixed puck of 5.20 μc charge if they are initially 18.0 cm apart.
28 Example 6 A TV has a potential difference of 2.0x10 4 V between its plates. Determine how fast an electron is travelling when it hits the screen.
29 EXTRA Shown is a simplified model of hydrogen. Calculate the electric work done in raising the electron from the ground state to the third orbital.
Electric Potential Energy & Electric Potential
Electric Potential Energy & Electric Potential Consider the following scenario. F E F E pt.a If we release the ve charge from pt.a The ELECTRIC FIELD produced by the ve charge pulls the ve charge to the
More informationElectric Potential Energy Chapter 16
Electric Potential Energy Chapter 16 Electric Energy and Capacitance Sections: 1, 2, 4, 6, 7, 8, 9 The electrostatic force is a conservative force It is possible to define an electrical potential energy
More informationElectric Fields Part 1: Coulomb s Law
Electric Fields Part 1: Coulomb s Law F F Last modified: 07/02/2018 Contents Links Electric Charge & Coulomb s Law Electric Charge Coulomb s Law Example 1: Coulomb s Law Electric Field Electric Field Vector
More informationPHYSICS 12 NAME: Electrostatics Review
NAME: Electrostatics Review 1. The diagram below shows two positive charges of magnitude Q and 2Q. Which vector best represents the direction of the electric field at point P, which is equidistant from
More informationPhysics 12 ELECTROSTATICS
Physics 12 ELECTROSTATICS F = kq 1Q 2 r2 E = V d V = kq r E p = kq 1Q 2 r F = qe V = E p Q 1 000 000 Volts 1 000 000 Volts NAME: Block: Text References 3 rd Ed. Giancolli Pg. 416-30 4 th Ed. Giancolli
More informationChapter 16 Electrical Energy Capacitance. HW: 1, 2, 3, 5, 7, 12, 13, 17, 21, 25, 27 33, 35, 37a, 43, 45, 49, 51
Chapter 16 Electrical Energy Capacitance HW: 1, 2, 3, 5, 7, 12, 13, 17, 21, 25, 27 33, 35, 37a, 43, 45, 49, 51 Electrical Potential Reminder from physics 1: Work done by a conservative force, depends only
More informationObjects can be charged by rubbing
Electrostatics Objects can be charged by rubbing Charge comes in two types, positive and negative; like charges repel and opposite charges attract Electric charge is conserved the arithmetic sum of the
More informationElectrostatics. 3) positive object: lack of electrons negative object: excess of electrons. Particle Mass Electric Charge. m e = 9.
Electrostatics 1) electric charge: 2 types of electric charge: positive and negative 2) charging by friction: transfer of electrons from one object to another 3) positive object: lack of electrons negative
More informationSemester 2 Physics (SF 026) Lecture: BP 3 by Yew Sze Fiona Website:
Semester 2 Physics (SF 026) Lecture: BP 3 by Yew Sze Ling @ Fiona Website: http://yslphysics.weebly.com/ Chapter 1: Electrostatics The study of electric charges at rest, the forces between them and the
More informationElectric Potential Energy
Electric Potential Energy the electric potential energy of two charges depends on the distance between the charges when two like charges are an infinite distance apart, the potential energy is zero An
More informationObjects usually are charged up through the transfer of electrons from one object to the other.
1 Part 1: Electric Force Review of Vectors Review your vectors! You should know how to convert from polar form to component form and vice versa add and subtract vectors multiply vectors by scalars Find
More informationChapter 2. Electric Fields Field Intensity Due to a Point Charge
Chapter 2 Electric Fields An electric field exists in a region if electrical forces are exerted on charged bodies in that region. The direction of an electric field at a point is the direction in which
More informationA 12-V battery does 1200 J of work transferring charge. How much charge is transferred? A source of 1.0 µc is meters is from a positive test
1 A source of 1.0 µc is 0.030 meters is from a positive test charge of 2.0 µc. (a) What is the force on the test charge? (b) What is the potential energy of the test charge? (c) What is the strength of
More informationPHYSICS 12 NAME: Electrostatics Review
NAME: Electrostatics Review 1. An electron orbits a nucleus which carries a charge of +9.6 x10-19 C. If the electron s orbital radius is 2.0 x10-10 m, what is its electric potential energy? A. -6.9 x10-18
More informationPHYSICS 12 NAME: Electrostatics Review
NAME: Electrostatics Review 1. The diagram below shows two positive charges of magnitude Q and 2Q. Which vector best represents the direction of the electric field at point P, which is equidistant from
More informationIntroduction to Charges. BCLN PHYSICS 12 - Rev. Sept/2012
Electrostatics ~ Learning Guide Name: Instructions: Using a pencil, answer the following questions. The Pre-Reading is marked, based on effort, completeness, and neatness (not accuracy). The rest of the
More informationthe electrical nature of matter is inherent in its atomic structure E & M atoms are made up of p+, n, and e- the nucleus has p+ and n
Electric Forces and Fields E & M the electrical nature of matter is inherent in its atomic structure atoms are made up of p+, n, and e- a.k.a Electricity and Magnetism the nucleus has p+ and n surrounding
More informationElectric Fields Electric charges exert forces on each other when they are a distance apart. The word Electric field is used to explain this action at
Electricity & Magnetism Electric Fields Marline Kurishingal Electric Fields Electric charges exert forces on each other when they are a distance apart. The word Electric field is used to explain this action
More informationP202 Practice Exam 1 Spring 2004 Instructor: Prof. Sinova
P202 Practice Exam 1 Spring 2004 Instructor: Prof. Sinova Name: Date: 1. Each of three objects has a net charge. Objects A and B attract one another. Objects B and C also attract one another, but objects
More informationChapter Assignment Solutions
Chapter 20-21 Assignment Solutions Table of Contents Page 558 #22, 24, 29, 31, 36, 37, 40, 43-48... 1 Lightning Worksheet (Transparency 20-4)... 4 Page 584 #42-46, 58-61, 66-69, 76-79, 84-86... 5 Chapter
More informationElectric potential energy The concept of electric potential and potential difference Motion of charges in electric field
In this chapter, you will learn: Electric potential energy The concept of electric potential and potential difference Motion of charges in electric field 2.1 Electric potential energy When a charged particle
More informationChapter 17. Electric Potential Energy and the Electric Potential
Chapter 17 Electric Potential Energy and the Electric Potential Consider gravity near the surface of the Earth The gravitational field is uniform. This means it always points in the same direction with
More informationPhysics The Motion of Charged Particles in Electric Fields Figure 1 use considerations of energy to analyze its motion Figure 2
Physics 12 The Motion of Charged Particles in Electric Fields In Figure 1, the charge q 1 experiences a Coulomb force, to the right in this case, whose magnitude is given by It simply means that if q 1,
More informationSome differences: Some basic similarities: Charges. Electrons vs. Protons 3/25/12. Chapters 22-25: Electromagnetism!
Chapters 22-25: Electromagnetism! Electric Force vs. Gravitational Force What properties does the gravitational force depend on? What properties does the electric force depend on? F grav = G*m 1 *m 2 /d
More informationElectrostatics Notes 1 Charges and Coulomb s Law
Electrostatics Notes 1 Charges and Coulomb s Law Matter is made of particles which are or charged. The unit of charge is the ( ) Charges are, meaning that they cannot be It is thought that the total charge
More informationElectrical Potential Energy and Electric Potential (Chapter 29)
Electrical Potential Energy and Electric Potential (Chapter 29) A Refresher Course on Gravity and Mechanical Energy Total mechanical energy: E mech = K + U, K= 1 2 mv2,u = potential energy f W = F!" ids
More informationCHAPTER 19 - ELECTRIC POTENTIAL ENERGY AND ELECTRIC POTENTIAL. Sections 1-5
CHAPTER 19 - ELECTRIC POTENTIAL ENERGY AND ELECTRIC POTENTIAL Sections 1-5 Objectives: After completing this unit, you should be able to: Understand an apply the concepts of electric potential energy,
More informationEL FORCE and EL FIELD HW-PRACTICE 2016
1 EL FORCE and EL FIELD HW-PRACTICE 2016 1.A difference between electrical forces and gravitational forces is that electrical forces include a. separation distance. b. repulsive interactions. c. the inverse
More informationP Q 2 = -3.0 x 10-6 C
1. Which one of the following represents correct units for electric field strength? A. T B. N/C C. J / C D. N m 2 /C 2 2. The diagram below shows two positive charges of magnitude Q and 2Q. P Q 2Q Which
More informationYou should be able to demonstrate and show your understanding of:
OCR B Physics H557 Module 6: Field and Particle Physics You should be able to demonstrate and show your understanding of: 6.1: Fields (Charge and Field) Field: A potential gradient Field Strength: Indicates
More informationChapter 10. Electrostatics
Chapter 10 Electrostatics 3 4 AP Physics Multiple Choice Practice Electrostatics 1. The electron volt is a measure of (A) charge (B) energy (C) impulse (D) momentum (E) velocity. A solid conducting sphere
More informationSPH4U UNIVERSITY PHYSICS
SPH4U UNIVERSITY PHYSICS ELECTRIC, GRAVITATIONAL, &... FIELDS L (P.346-349) Electric Fields From the definition of an electric field as a force acting on a charge, it follows that, for a given uniform
More informationChapter 11. Electricity. Electric Charge Atoms and Ions Coulomb s Law Electric Field Electric Field Lines Potential Difference
Chapter 11 Electricity In This Chapter: Electric Charge Atoms and Ions Coulomb s Law Electric ield Electric ield Lines Potential Difference Electric Charge Electric charge, like mass, is one of the basic
More informationHandout 3: Electric potential and electric potential energy. Electric potential
Handout 3: Electric potential and electric potential energy Electric potential Consider a charge + fixed in space as in Figure. Electric potential V at any point in space is defined as the work done by
More informationExam 1 Solutions. The ratio of forces is 1.0, as can be seen from Coulomb s law or Newton s third law.
Prof. Eugene Dunnam Prof. Paul Avery Feb. 6, 007 Exam 1 Solutions 1. A charge Q 1 and a charge Q = 1000Q 1 are located 5 cm apart. The ratio of the electrostatic force on Q 1 to that on Q is: (1) none
More informationElectric Charge and Electric Field AP Physics 4 Lecture Notes
Electric Charge and Electric Field AP Physics 4 Lecture Notes Coulomb s Law The Electric Field Field Lines Electric Fields and Conductors Coulomb s law: Coulomb s Law Force (N) F F F k r F F F r Charge
More informationA Uniform Gravitational Field
A Uniform Gravitational Field We could define a gravitational field in much the same way we have defined the electric field: E = F on q q, g = F on m m (note that m/s 2 = N/kg) The gravitational field
More informationAlgebra Based Physics Electric Field, Potential Energy and Voltage
1 Algebra Based Physics Electric Field, Potential Energy and Voltage 2016 04 19 www.njctl.org 2 Electric Field, Potential Energy and Voltage Click on the topic to go to that section Electric Field *Electric
More informationc. They have electric charges that move freely d. Electrons are added to the rod a. charges are of unlike signs b. charges are of like signs
Physics Review Chapter 17 & 18 Name: Date: Period: 1. What sentence best characterizes electron conductors? a. They have low mass density b. They have high tensile strength c. They have electric charges
More informationCPS lesson Electric Field ANSWER KEY
CPS lesson Electric Field ANSWER KEY 1. A positively charged rod is brought near a conducting sphere on an insulated base. The opposite side of the sphere is briefly grounded. If the rod is now withdrawn,
More informationElectricity and Magnetism. Electric Potential Energy and Voltage
Electricity and Magnetism Electric Potential Energy and Voltage Work and Potential Energy Recall from Mechanics that E mech = K + U is a conserved quantity for particles that interact via conservative
More informationRecall Gravitational Potential Energy
Electric Potential Recall Gravitational Potential Energy How can you increase the gravitational potential energy of an object? Raise it above the surface of the earth. The amount of work done against earth
More informationElectricity Final Unit Final Assessment
Electricity Final Unit Final Assessment Name k = 1/ (4pe 0 ) = 9.0 10 9 N m 2 C -2 mass of an electron = 9.11 10-31 kg mass of a proton = 1.67 10-27 kg G = 6.67 10-11 N m 2 kg -2 C = 3 x10 8 m/s Show all
More informationGravitational & Electric Fields
Gravitational & Electric Fields Jessica Wade (jess.wade@kcl.ac.uk) www.makingphysicsfun.com Department of Physics & Centre for Plastic Electronics, Imperial College London Faculty of Natural & Mathematical
More informationTest Review FQ3eso_U5_3_Electric force
Test Review FQ3eso_U5_3_Electric force Identify the letter of the choice that best completes the statement or answers the question. 1.- Two metal spheres, A and B, possess charges of 1.0 microcoulomb and
More informationElectrostatics Notes 2 Electric Field on a Single Charge
Electrostatics Notes 2 Electric Field on a Single Charge There are many similarities between gravitational and electrostatic forces. One such similarity is that both forces can be exerted on objects that
More informationChapter 12 Electrostatic Phenomena
Chapter 12 Electrostatic Phenomena 1. History Electric Charge The ancient Greeks noticed that if you rubbed amber (petrified tree resin) on fur, then the amber would have a property that it could attract
More informationElectric Potential and Potential Energy. A reformulation from a vector approach to a scalar approach
Electric Potential and Potential Energy A reformulation from a vector approach to a scalar approach Once again, compare to gravity, be very careful though Potential is not the same thing as potential energy
More informationPHYSICS. Electrostatics
Electrostatics Coulomb s Law: SYNOPSIS SI unit of electric intensity is NC -1 Dimensions The electric intensity due to isolated point charge, Electric dipole moment, P = q (2a), SI unit is C m Torque on
More informationElectric Potential Energy Conservative Force
Electric Potential Energy Conservative Force Conservative force or field is a force field in which the total mechanical energy of an isolated system is conserved. Examples, Gravitation, Electrostatic,
More informationPhysics 2020: Sample Problems for Exam 1
Physics 00: Sample Problems for Eam 1 1. Two particles are held fied on the -ais. The first particle has a charge of Q 1 = 6.88 10 5 C and is located at 1 = 4.56 m on the -ais. The second particle has
More informationChapter 17 & 18. Electric Field and Electric Potential
Chapter 17 & 18 Electric Field and Electric Potential Electric Field Maxwell developed an approach to discussing fields An electric field is said to exist in the region of space around a charged object
More informationELECTROSTATIC FIELDS
ELECTROSTATIC FIELDS Electric charge Ordinary matter is made up of atoms which have positively charged nuclei and negatively charged electrons surrounding them. A body can become charged if it loses or
More informationis at the origin, and charge q μc be located if the net force on q
Term: 152 Saturday, April 09, 2016 Page: 1 Q1. Three point charges are arranged along the x-axis. Charge q 3.0 0 μc 1 is at the origin, and charge q 5.0 0 μc 2 is at x = 0.200 m. Where should a third charge
More informationPHYSICS - Electrostatics
PHYSICS - Electrostatics Electrostatics, or electricity at rest, involves electric charges, the forces between them, and their behavior in materials. 22.1 Electrical Forces and Charges The fundamental
More informationExam 1--PHYS 102--S14
Class: Date: Exam 1--PHYS 102--S14 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. The magnitude of the charge on an electron is approximately: a. 10-23
More informationRecap: Electric Field Lines Positive Charge: field lines outwards direction Negative Charge: converge F + In both cases density
Recap: Electric Field Lines Concept of electric field lines initially used by Michael Faraday (19 th century) to aid visualizing electric (and magnetic) forces and their effects. James Clerk Maxwell (19
More informationAP Physics Study Guide Chapter 17 Electric Potential and Energy Name. Circle the vector quantities below and underline the scalar quantities below
AP Physics Study Guide Chapter 17 Electric Potential and Energy Name Circle the vector quantities below and underline the scalar quantities below electric potential electric field electric potential energy
More informationEnd-of-Chapter Exercises
End-of-Chapter Exercises Exercises 1 12 are primarily conceptual questions designed to see whether you understand the main concepts of the chapter. 1. (a) If the electric field at a particular point is
More informationChapter 20 Electric Potential and Electric potential Energy
Outline Chapter 20 Electric Potential and Electric potential Energy 20-1 Electric Potential Energy and the Electric Potential 20-2 Energy Conservation 20-3 The Electric Potential of Point Charges 20-4
More informationFísica Básica Experimental I Cuestiones Tema VII. Electrostática. Soluciones incluidas. 1.
1. A cubical surface with no charge enclosed and with sides 2.0 m long is oriented with right and left faces perpendicular to a uniform electric field E of (1.6 10 5 N/C) î. The net electric flux E through
More informationElectrostatics and Electric Potential - Outline
Electrostatics and Electric Potential - Outline 1. Understand the basic properties of electric charge, including conservation of charge and that charges are quantized. 2. Differentiate between conductors
More informationChapter 1 The Electric Force
Chapter 1 The Electric Force 1. Properties of the Electric Charges 1- There are two kinds of the electric charges in the nature, which are positive and negative charges. - The charges of opposite sign
More informationChapter 16. Electric Energy and Capacitance
Chapter 16 Electric Energy and Capacitance Electric Potential Energy The electrostatic force is a conservative force It is possible to define an electrical potential energy function with this force Work
More informationElectric Charge & Force Problems - 1 v Goodman & Zavorotniy
Electric Charge Chapter Questions 1. What happens to a plastic rod when it is rubbed with a piece of animal fur? What happens to the piece of fur? 2. How many types of electric charge are there? What are
More informationElectric Charge & Force Problems - 1 v Goodman & Zavorotniy
The Atom Chapter Questions 1. Which part on an atom carries a positive charge? Which carries the negative charge? 2. How many types of electric charge are there? 3. When a neutral atom captures a free
More informationPolarization. Polarization is not necessarily a charge imbalance!
Electrostatics Polarization Polarization is the separation of charge In a conductor, free electrons can move around the surface of the material, leaving one side positive and the other side negative. In
More informationAP Physics 2012 Practice Quiz 4, Conduction & Electric Fields
Name: Class: Date: ID: A AP Physics 01 Practice Quiz 4, Conduction & Electric Fields Multiple Choice Identify the choice that best completes the statement or answers the question. 1. ( points) A repelling
More informationElectric Potential Energy and Voltage
Slide 1 / 105 Electric Potential Energy and Voltage www.njctl.org Slide 2 / 105 How to Use this File Each topic is composed of brief direct instruction There are formative assessment questions after every
More information7 ELECTRIC POTENTIAL
Chapter 7 Electric Potential 285 7 ELECTRIC POTENTIAL Figure 7.1 The energy released in a lightning strike is an excellent illustration of the vast quantities of energy that may be stored and released
More informationPhysics 1520, Fall 2011 Quiz 3, Form: A
Physics 1520, Fall 2011 Quiz 3, Form: A Name: Date: Numeric answers must include units. Sketches must be labeled. All short-answer questions must include your reasoning, for full credit. A correct answer
More information47 CHARGE. 1. What are the basic particles of charge?
47 CHARGE 1. What are the basic particles of charge? 2. There are three variables for charge listed to the right. Tell the typical circumstances when each is used. 3. Charge What are the units of charge?
More informationChapter 23 Electric Potential. Copyright 2009 Pearson Education, Inc.
Chapter 23 Electric Potential Units of Chapter 23 Electric Potential Energy and Potential Difference Relation between Electric Potential and Electric Field Electric Potential Due to Point Charges Potential
More informationChapter 25. Electric Potential
Chapter 25 Electric Potential Outline 25.1 Potential difference and electric Potential 25.2 Potential Difference and electric field 25.3 Electric Potential and Potential energy due to point charges 25.1
More informationAP Physics 1 Multiple Choice Questions - Chapter 11
1 Two protons are held a distance d apart. The electrostatic force and the gravitational force that one protons exerts on the other are F e and F g, respectively. Which of the following correctly compares
More informationPotential from a distribution of charges = 1
Lecture 7 Potential from a distribution of charges V = 1 4 0 X Smooth distribution i q i r i V = 1 4 0 X i q i r i = 1 4 0 Z r dv Calculating the electric potential from a group of point charges is usually
More informationTwo equally charges particles are 3 cm apart and repel each other with a force of 4 x10-5 N. Compute the charge on each particle.
Physics QOD 12.3 Two equally charges particles are 3 cm apart and repel each other with a force of 4 x10-5 N. Compute the charge on each particle. q 1 = q 2 = 2 x 10-9 C 12.3 ELECTRIC FIELDS Electric Fields
More informationPractice Exam 1. Necessary Constants and Equations: Electric force (Coulomb s Law): Electric field due to a point charge:
Practice Exam 1 Necessary Constants and Equations: Electric force (Coulomb s Law): Electric field due to a point charge: Electric potential due to a point charge: Electric potential energy: Capacitor energy:
More informationElectrons are transferred from the fur to the rubber rod. As a result, the rubber rod becomes charged and the fur becomes charged.
AP Physics Electric Forces, Fields, Energy and Capacitance Chapter 16-17 Chapter 16 - Reading pp. 501-527 - text HW #2,9,12,21,23,26,43,45,46,47,61,65 Chapter 17 - Reading pp. 535-562 - text HW #1,4,10,11,15,16,21,22,29,30,31,37,
More informationElectric Field of a uniformly Charged Thin Spherical Shell
Electric Field of a uniformly Charged Thin Spherical Shell The calculation of the field outside the shell is identical to that of a point charge. The electric field inside the shell is zero. What are the
More informationChapter 21 Electric Charge and Electric Field
Chapter 21 Electric Charge and Electric Field 21-1 Static Electricity; Electric Charge and Its Conservation Objects can be charged by rubbing 21-1 Static Electricity; Electric Charge and Its Conservation
More informationChapter 23. Electric Fields
Chapter 23 Electric Fields Electric Charges There are two kinds of electric charges Called positive and negative Negative charges are the type possessed by electrons Positive charges are the type possessed
More informationBook page. Coulombs Law
Book page Coulombs Law A Coulomb torsion balance A Coulomb torsion balance is used to measure the force between two charged objects Coulomb's Torsion Balance Two conducting spheres fixed on insulating
More informationCapacitors II. Physics 2415 Lecture 9. Michael Fowler, UVa
Capacitors II Physics 2415 Lecture 9 Michael Fowler, UVa Today s Topics First, some review then Storing energy in a capacitor How energy is stored in the electric field Dielectrics: why they strengthen
More informationCh. 16 and 17 Review Problems
Ch. 16 and 17 Review Problems NAME 1) Is it possible for two negative charges to attract each other? A) Yes, they always attract. B) Yes, they will attract if they are close enough. C) Yes, they will attract
More informationElectric Force and Field Chapter Questions
Electric Force and Field Chapter Questions 1. What happens to a plastic rod when it is rubbed with a piece of animal fur? What happens to the piece of fur? 2. How many types of electric charge are there?
More informationPhysics 126 Fall 2004 Practice Exam 1. Answer will be posted about Oct. 5.
Physics 126 Fall 2004 Practice Exam 1. Answer will be posted about Oct. 5. 1. Which one of the following statements best explains why tiny bits of paper are attracted to a charged rubber rod? A) Paper
More informationChapter 18 Electrostatics Electric Forces and Fields
Chapter 18 Electrostatics Electric Forces and Fields Electrical charges that does not flow through an object, but sit stationary on the surface of an object. Usually it is isolated on the surface, but
More informationGravity and Coulomb s Law
AP PHYSICS 1 Gravity and Coulomb s Law 016 EDITION Click on the following link or scan the QR code to complete the evaluation for the Study Session https://www.surveymonkey.com/r/s_sss Copyright 016 National
More informationLos Altos Physics Honors. Electrostatics: Electric Fields, Electric Forces, Electric Potentials and. Electric Potential Energy.
Los Altos Physics Honors Electrostatics: Electric Fields, Electric Forces, Electric Potentials and Electric Potential Energy Workbook adam.randall@mvla.net www.laphysics.com dls.mvla.net/los_altos Spring
More informationCompiled and rearranged by Sajit Chandra Shakya
1 (a) Define capacitance. [May/June 2005] 1...[1] (b) (i) One use of a capacitor is for the storage of electrical energy. Briefly explain how a capacitor stores energy......[2] (ii) Calculate the change
More informationObjects can be charged by rubbing
Electrostatics Objects can be charged by rubbing Charge comes in two types, positive and negative; like charges repel and opposite charges attract Electric charge is conserved the arithmetic sum of the
More informationChapters 21 and 22: Giancoli, 4 th Edition Electrostatics
Chapters 21 and 22: Giancoli, 4 th Edition Electrostatics Electric Charges Coulomb s Law and Electric force The Electric Field Electric Field Lines Electric flux Gauss Law and applications of Gauss Law
More informationElectrostatics. Electrostatics the study of electrical charges that can be collected and held in one place. Also referred to as Static Electricity
Electrostatics 169 Electrostatics Electrostatics the study of electrical charges that can be collected and held in one place. Types of Charge Also referred to as Static Electricity Benjamin Franklin noticed
More informationAgenda for Today. Elements of Physics II. Conductors and Insulators Movement of charges Conservation of charge Static electricity Electroscope
Physics 132: Lecture e 5 Elements of Physics II Agenda for Today Conductors and Insulators Movement of charges Conservation of charge Static electricity Electroscope Physics 201: Lecture 1, Pg 1 Problem
More informationElectrostatics Test Review Hons. All work must be shown,including givens, equations used, and units. Draw diagrams as appropriate.
Electrostatics Test Review Hons. All work must be shown,including givens, equations used, and units. Draw diagrams as appropriate. 1. If a charged rod A attracts another rod B, you can conclude that a.
More informationI. Origin of Electricity
Name Regents Physics Mr. Mellon Based on Chapter 20 and 21 Essential Questions What is the charge of an elementary charge? Know how to convert elementary charges to Coulombs (vice-versa). Explain the conservation
More informationCoulomb s Law. Phys102 Lecture 2. Key Points. Coulomb s Law The electric field (E is a vector!) References
Phys102 Lecture 2 Phys102 Lecture 2-1 Coulomb s Law Key Points Coulomb s Law The electric field (E is a vector!) References SFU Ed: 21-5,6,7,8,9,10. 6 th Ed: 16-6,7,8,9,+. Phys102 Lecture 2 Phys102 Lecture
More informationChapter 21: Electric Potential Solutions
Chapter 21: Electric Potential Solutions Questions: 2, 7, 14 Exercises & Problems: 1, 6, 10, 12, 16, 21, 25, 27, 71 Q21.2: Charge q is fired through a small hole in the positive plate of a capacitor. a)
More informationLecture 2 [Chapter 21] Tuesday, Jan 17th
Lecture 2 [Chapter 21] Tuesday, Jan 17th Administrative Items Assignments this week: read Ch 21 and Ch 22 in the textbook complete Pre-Lecture Ch22 HW assignment complete Ch 21 HW assignment [Pre-Lecture
More information