# r where the electric constant

Size: px
Start display at page:

Transcription

1 1.0 ELECTROSTATICS At the end of this topic, students will be able to: Coulomb s law a) Explain the concepts of electrons, protons, charged objects, charged up, gaining charge, losing charge, charging by contact, charging by induction, grounding, charge quantization, charge conservation, conductors and insulators.. b) Describe the motion of point charges when placed near another charged object. c) Relate the motion of charges to a force and state Coulomb s Law. d) Explain, qualitatively, how the direction and the strength of this force changes with magnitude of the charges and the distance between the charges. e) Draw a force diagram to a system of point charges and obtain the direction and magnitude of the resultant force acting on a point charge due to the presence of other point charges. Relate the motion to Newton s nd law of motion and to the concept of motion. r q1q F = k r where the electric constant 1 9 N k = = πε C m 0 point charges along the x-axes, along the y-axes and 3 charges that forms a rightangled triangle. HP: Page 1 of 1

2 1. Electric field a) State qualitative meaning of an electric field b) Write the electric field strength produced by a point charge and explain qualitatively how the field strength and direction changes when measured at different places. c) Sketch the electric field lines produced by an isolated point charge, by two positive or two negative point charges, by a pair of positivenegative charge and for a point charge placed between a uniformlycharged parallel plates. d) Obtain numerically and show pictorially the electric field strength and direction for a point charge, for a system of two charges and for a system of three charges. e) Explain the effect of the electric field on a positive test charge placed at midpoint between a pair of positive or negative charges and a pair of positive-negative charge. r q E = k r. Note also the direction. Indicate the change of strength (field intensity) by varying the length of the field lines. Draw the field lines for a system of positive charges, negative charges and a pair of positive- negative charge. Numerically determine the field intensity on the right, on the left and at midpoints along the line of a pair of positive charges and a pair of positive-negative charge. r r q0q F = q0e = k. r.0 ELECTRIC POTENTIAL At the end of this topic, the student will be able to: HP: Page of 1

3 .1 Electric Potential & Equipotential Surfaces a) Define electric potential and an equipotential surface. b) Sketch equipotential lines for an isolated positive charge, for an isolated negative charge, for a pair of positive-positive charge, for a pair of positive-negative charge and for a parallel-plate capacitor c) Write the strength and numerically obtain the potential for an isolated charge. d) Write the strength and numerically obtain the potential to the right, to the left and at midpoints for a pair of positive-positive charge and for a pair of positive-negative charge. e) Write, explain and numerically obtain the field strength in the area between a uniformly-charged parallel-plate capacitors. f) Explain, qualitatively, the electric potential energy gain or lost when a positive point charge is moved in an electric field. Electric potential as the amount of work done in moving a point charge from far away (infinity) to some point A in an electric field (compare to moving a mass in a gravitational field). WBA V VA = V A = q0. Equipotential surface as a surface where V is a constant. For a point charge, q0e q V = r = k r = q r V E = d 0 q k r Explain the work energy relation W = U U = q V AB B A 0 HP: Page 3 of 1

4 3.0 CAPACITOR AND DIELECTRICS At the end of this topic, the student will be able to: Capacitance and energy of capacitors a) Define capacitance and state the purpose of a capacitor. b) Explain, qualitatively and algebraically, the factors affecting the capacitance of a parallel plate capacitor and the changes in the capacitance when the geometrical dimensions are changed. c) Numerically determine the capacitance of parallel plate capacitors and the changes in the capacitance when the geometrical dimensions are changed. d) Qualitatively, algebraically and numerically explain and obtain the changes in energy stored by a parallel-plate capacitor when the charging source and/or the geometrical dimensions are changed. Capacitance as a measure the charge on the capacitor per unit Q voltage, C = V Air-filled capacitor ε 0 A C0 =, C = ε r C o d Table of dielectric constant Other types of capacitors are not discussed Q U = CV = QV = C 1 3. Capacitors in series and parallel combination 4.0 ELECTRIC CURRENT AND DIRECT-CURRENT CIRCUITS a) Draw a schematic diagram for capacitors connected in series and capacitors connected in parallel. b) Obtain the mathematical formulation for effective capacitances for capacitors connected in series and connected in parallel. c) Calculate the effective capacitances of capacitors in series, capacitors in parallel and capacitors in series-parallel combination. Limit to five capacitors. Use the constant potential difference for a parallel circuit and constant current in series circuit to obtain effective capacitance. Parallel: C = C1 + C C Series: = d) Determine the voltage, the charge stored and the energy stored on each capacitor in a series, in parallel and in connected in series-parallel combination. At the end of this topic, the student will be able to: 10 C C 1 C C 5 HP: Page 4 of 1

5 4.1 Ohm s law and Resistivity a) Define electric current. b) Explain the relationship between current flow, electric field and potential difference between two points in a circuit. c) Define electromotive force (emf) of a battery and explain its role to current flow in a circuit. d) Draw an equivalent circuit to represent a battery with emf ε and internal resistance r and explain its effect to the current flowing in circuit. e) State and mathematically write Ohm s law. f) State and explain the relationship between the resistance of a wire to its physical dimensions and to its resistivity. g) Explain the concept of potential drop across a resistor in a simple circuit. ΔQ I =, V=IR dq I = dt R = ρl A Introduce conductivity as the inverse of resistivity 1 σ = ρ Simple circuit is limited to only one load (bulb or resistor) V = ξ Ir 3 4. Electrical energy and power a) Define electrical power and explain joule heating in a resistor. b) Determine the dissipative power and energy loss in a simple circuit. Include P = I R and V P = R for power. Emphasize on V as potential difference across resistors. P = VI and Energy VIt 1 HP: Page 5 of 1

6 4.3 Resistors in series and parallel a) Draw a circuit diagram for resistors in series and resistors in parallel. b) Obtain the mathematical formulation for effective resistances for resistors connected in series and resistors connected in parallel. c) Calculate the effective resistance of resistors in series, resistors in parallel and resistors in series-parallel combination. d) Determine the voltage and the current on each resistor connected in series, connected in parallel and connected in a series-parallel combination. 4.4 Kirchhoff s Laws a) State Kirchoff s current and voltage laws and write the mathematical representation for both laws. b) Label the high and low potential points across resistors and batteries for a given current direction in a loop. c) Write Kirchhoff s laws applied to a two-loop circuit. Limit to four resistors. Use Ohm s Law. Use the constant potential difference for a parallel circuit and constant current in series circuit to obtain the effective resistance. Limit to a maximum of only 3 resistors in series and 3 resistors in parallel for the combination circuit. Σ V = ΣV, Σ Iin = ΣI out drop rise Limit to a maximum of only 3 resistors and batteries in each loop. Specify the current before labelling the high and low potential ends. Maximum of two closed circuit loops MAGNETIC FIELD At the end of this topic, the student will be able to: 9 HP: Page 6 of 1

7 5.1 Permanent magnets and magnetic force a) Sketch the magnetic field lines produced by permanent magnets. Bar magnet and horse-shoe magnets b) Describe the relationship between a magnet s poles and the field lines produced. c) Describe the effect of magnetic field on static and moving electric charges. d) Write the strength and determine the direction of magnetic force acting on moving charges by using the First Right Hand Rule. e) Use the First Right Hand Rule to obtain direction of motion, direction of magnetic field or the magnetic force whenever any two of the quantities are known. Use tiny compasses to represent B field lines and to show direction of the field. Briefly describe the Earth as a giant magnet. Briefly mention the common units used for field strength and some typical values of B. Only moving charges with velocity perpendicular to or having the velocity component which is perpendicular to the field will experience a magnetic force. F = qvbsinθ vb. NO NEED to introduce cross product. Use either the first right hand rule (thumb along velocity, other fingers along B then the palm will show force acting on a +ve charge) or any other easy-to remember rules to determine direction of the force. HP: Page 7 of 1

8 5. Magnetic field produced by current-carrying conductor a) Determine the direction of magnetic field produced by current-carrying conductor. b) Sketch the field lines produced by a long current-carrying conductor and by a circular wire. Use the nd Right Hand Rule (corkscrew) to determine direction of B r for both the long wire and circular wire. 3 c) Write and numerically determine the strength (intensity) of the field produced by a long wire as a function of the current carried by the wire and distance from the wire. μ0i B = for a long straight πr wire d) Write and numerically determine the strength (intensity) of the field produced at the centre of a circular wire. e) Draw the magnetic field lines and label the North-South poles for a solenoid. μ I B = 0 at the centre of a r circular wire of radius R. f) Write and numerically determine the strength (intensity) of the field produced along the centre of a solenoid. B = μ 0nI for a solenoid with N turns per meter of the wire. HP: Page 8 of 1

9 5.3 Magnetic Force on a moving charged particle and on a current-carrying conductor. a) Determine the magnitude and direction of force acting on a charged particle moving near a current-carrying conductor. b) Determine the magnitude and direction of the force acting between two parallel current-carrying conductors and between two wires carrying current in opposite directions. c) Determine the direction of the force acting between two parallel circular wires carrying current in the same directions and two parallel circular wires carrying current in the opposite directions. d) Compute the force per unit length on two adjacent parallel current-carrying conductors Use the 1 st Right Hand Rule. F = qvbsinθ Force between two parallel wires: F = qvbsin θ vb = ILBsinθ IB. You need to first determine the B field produced by each wire (using the corkscrew rule) before applying the 1 st Right Hand Rule. Determine the poles for the circular wires before determining the direction of forces between two parallel coils. Assume wires of same lengths L, F μ 0I then = I1 B = I1 L πd vb Torque on a coil a) Determine the force directions on the sides of a rectangular coil with surface area A and carrying current I placed in a magnetic field B. b) Describe the effect of the magnetic force on the coil, qualitatively and pictorially. c) List and explain the factors affecting speed of rotation for a rectangular coil of surface area A, carrying current I placed in a magnetic field B. Use results from section 13.3 Show the force directions and the direction of rotation for both sides and how that changes when current direction or field direction is reversed. Area, field strength, number of turns and the current 6.0 ELECTROMAGNETIC INDUCTION At the end of this topic, the student will be able to: 4 HP: Page 9 of 1

10 6.1 Magnetic Flux and Faraday s Law a) Define magnetic flux and explain the factors that will change magnetic flux, b) Qualitatively and diagrammatically describe what happens in a conducting wire coil when a bar magnet is moved towards or away from the coil. c) State Faraday s law and mathematically write the law. d) Use Faraday s law to qualitatively explain the maximum induced current and hence the emf in a conducting wire coil connected in series with a resistor. e) Qualitatively explain the relationship between induced voltage (emf) and the induced current. f) Calculate the induced emf in a single coil and in coils with N turns for changes in B field strength and for changes in the area of the coil. Flux governed by product of the magnetic field (its perpendicular component) strength passing through the surface of a coil and the area of the coil.. Φ = BA cosθ. Limit to field lines that are perpendicular to surface. Emphasize on the magnet s polarity and its direction of motion as the determining factor in describing the direction of induced current. ΔΦ emf = N (induced voltage) Example of changes in B only and changes in A only. 3 g) Determine the imaginary poles for the induced magnetic field for magnets moving into and away from a conducting wire coil. Use the imaginary poles for the induced B field to decide direction of induced I and the high and low potential ends of the resistor. HP: Page 10 of 1

11 6. Lenz s Law a) State Lenz s law and describe how the law is used to explain part (g)of section 6.1, the direction of the induced current and hence the induced emf. ΔΦ Δ(cosΘ) emf = N = NAB b) Apply Lenz s Law to determine the direction of the induced current and the induced emf in a coil being rotated between poles of a permanent magnet and to explain the sinusoidal behaviour of the induced emf and induced current. c) Apply Faraday s Law to obtain the magnitude of the induced emf for a coil rotating between the poles of a permanent magnet and use Ohm s Law to determine the induced current in the coil. 6.3 Electric Generators, Inductors & Transformers a) Qualitatively compare and contrast the induction mechanism in an electric generator and an electric motor. b) Quantitatively compare and contrast self inductance and mutual inductance on coils carrying current which is timedependent c) Determine the induced emf in inductors from a current-time graph and obtain the energy stored by the inductor. d) Qualitatively and quantitatively explain the mechanism of a step-up and a step-down AC transformer. Show that for mutual inductance: ΔΦ ΔI p emf = N = M Show that for self inductance: ΔΦ ΔI emf = N = L Energy stored is 1 Energy= LI Discuss the flux change between the primary & secondary coil being the same since it shares ΔΦ the same core: emfs = Ns, ΔΦ emfp = N p ; emf s = emf p emfp N p V p N p = or = emf N V N s s s s 1 HP: Page 11 of 1

12 HP: Page 1 of 1

### r where the electric constant

0. Coulomb s law a) Explain the concepts of electrons, protons, charged objects, charged up, gaining charge, losing charge, grounding and charge conservation. b) Describe the motion of point charges when

### Mansfield Independent School District AP Physics C: Electricity and Magnetism Year at a Glance

Mansfield Independent School District AP Physics C: Electricity and Magnetism Year at a Glance First Six-Weeks Second Six-Weeks Third Six-Weeks Lab safety Lab practices and ethical practices Math and Calculus

### AP Physics C. Magnetism - Term 4

AP Physics C Magnetism - Term 4 Interest Packet Term Introduction: AP Physics has been specifically designed to build on physics knowledge previously acquired for a more in depth understanding of the world

### PHY102 Electricity Course Summary

TOPIC 1 ELECTOSTTICS PHY1 Electricity Course Summary Coulomb s Law The magnitude of the force between two point charges is directly proportional to the product of the charges and inversely proportional

### Physics 6B Summer 2007 Final

Physics 6B Summer 2007 Final Question 1 An electron passes through two rectangular regions that contain uniform magnetic fields, B 1 and B 2. The field B 1 is stronger than the field B 2. Each field fills

### AP Physics C. Electricity - Term 3

AP Physics C Electricity - Term 3 Interest Packet Term Introduction: AP Physics has been specifically designed to build on physics knowledge previously acquired for a more in depth understanding of the

### Physics / Higher Physics 1A. Electricity and Magnetism Revision

Physics / Higher Physics 1A Electricity and Magnetism Revision Electric Charges Two kinds of electric charges Called positive and negative Like charges repel Unlike charges attract Coulomb s Law In vector

### Physics 112. Study Notes for Exam II

Chapter 20 Electric Forces and Fields Physics 112 Study Notes for Exam II 4. Electric Field Fields of + and point charges 5. Both fields and forces obey (vector) superposition Example 20.5; Figure 20.29

### b) (4) How large is the current through the 2.00 Ω resistor, and in which direction?

General Physics II Exam 2 - Chs. 19 21 - Circuits, Magnetism, EM Induction - Sep. 29, 2016 Name Rec. Instr. Rec. Time For full credit, make your work clear. Show formulas used, essential steps, and results

### 8. (6) Consider the circuit here with resistors R A, R B and R C. Rank the

General Physics II Exam 2 - Chs. 18B 21 - Circuits, Magnetism, EM Induction - Oct. 3, 2013 Name Rec. Instr. Rec. Time For full credit, make your work clear. Show formulas used, essential steps, and results

### Physics Will Farmer. May 5, Physics 1120 Contents 2

Physics 1120 Will Farmer May 5, 2013 Contents Physics 1120 Contents 2 1 Charges 3 1.1 Terms................................................... 3 1.2 Electric Charge..............................................

### Chapter 21 Magnetic Induction Lecture 12

Chapter 21 Magnetic Induction Lecture 12 21.1 Why is it called Electromagnetism? 21.2 Magnetic Flux and Faraday s Law 21.3 Lenz s Law and Work-Energy Principles 21.4 Inductance 21.5 RL Circuits 21.6 Energy

### Chapter 1: Electrostatics

1.1 Coulomb s law a) State Coulomb s law, Chapter 1: Electrostatics b) Sketch the electric force diagram and apply Coulomb s law for a system of point charges. 1.2 Electric field a) Define and use electric

### ELECTRICITY AND MAGNETISM, A. C. THEORY AND ELECTRONICS, ATOMIC AND NUCLEAR PHYSICS

UNIT 2: ELECTRICITY AND MAGNETISM, A. C. THEORY AND ELECTRONICS, ATOMIC AND NUCLEAR PHYSICS MODULE 1: ELECTRICITY AND MAGNETISM GENERAL OBJECTIVES On completion of this Module, students should: 1. understand

### n Higher Physics 1B (Special) (PHYS1241) (6UOC) n Advanced Science n Double Degree (Science/Engineering) n Credit or higher in Physics 1A

Physics in Session 2: I n Physics / Higher Physics 1B (PHYS1221/1231) n Science, dvanced Science n Engineering: Electrical, Photovoltaic,Telecom n Double Degree: Science/Engineering n 6 UOC n Waves n Physical

### Louisiana State University Physics 2102, Exam 3 April 2nd, 2009.

PRINT Your Name: Instructor: Louisiana State University Physics 2102, Exam 3 April 2nd, 2009. Please be sure to PRINT your name and class instructor above. The test consists of 4 questions (multiple choice),

### PHYSICS ASSIGNMENT ES/CE/MAG. Class XII

PHYSICS ASSIGNMENT ES/CE/MAG Class XII MM : 70 1. What is dielectric strength of a medium? Give its value for vacuum. 1 2. What is the physical importance of the line integral of an electrostatic field?

### AP Physics C Mechanics Objectives

AP Physics C Mechanics Objectives I. KINEMATICS A. Motion in One Dimension 1. The relationships among position, velocity and acceleration a. Given a graph of position vs. time, identify or sketch a graph

### 21 MAGNETIC FORCES AND MAGNETIC FIELDS

CHAPTER 1 MAGNETIC FORCES AND MAGNETIC FIELDS ANSWERS TO FOCUS ON CONCEPTS QUESTIONS 1 (d) Right-Hand Rule No 1 gives the direction of the magnetic force as x for both drawings A and B In drawing C, the

### Physics for Scientists and Engineers 4th Edition 2017

A Correlation and Narrative Summary of Physics for Scientists and Engineers 4th Edition 2017 To the AP Physics C: Electricity and Magnetism Course Description AP is a trademark registered and/or owned

### Gen. Phys. II Exam 2 - Chs. 21,22,23 - Circuits, Magnetism, EM Induction Mar. 5, 2018

Gen. Phys. II Exam 2 - Chs. 21,22,23 - Circuits, Magnetism, EM Induction Mar. 5, 2018 Rec. Time Name For full credit, make your work clear. Show formulas used, essential steps, and results with correct

### Module 3 Electrical Fundamentals

3.1 Electron Theory Structure and distribution of electrical charges within: atoms, molecules, ions, compounds; Molecular structure of conductors, semiconductors and insulators. 3.2 Static Electricity

### Last time. Ampere's Law Faraday s law

Last time Ampere's Law Faraday s law 1 Faraday s Law of Induction (More Quantitative) The magnitude of the induced EMF in conducting loop is equal to the rate at which the magnetic flux through the surface

### Electrical polarization. Figure 19-5 [1]

Electrical polarization Figure 19-5 [1] Properties of Charge Two types: positive and negative Like charges repel, opposite charges attract Charge is conserved Fundamental particles with charge: electron

### Physics 2B: Review for Celebration #2. Chapter 22: Current and Resistance

Physics 2: eview for Celebration #2 Chapter 22: Current and esistance Current: q Current: I [I] amps (A) 1 A 1 C/s t Current flows because a potential difference across a conductor creates an electric

### Ch. 23 Electromagnetic Induction, AC Circuits, And Electrical Technologies

Ch. 23 Electromagnetic Induction, AC Circuits, And Electrical Technologies Induced emf - Faraday s Experiment When a magnet moves toward a loop of wire, the ammeter shows the presence of a current When

### Where k = 1. The electric field produced by a point charge is given by

Ch 21 review: 1. Electric charge: Electric charge is a property of a matter. There are two kinds of charges, positive and negative. Charges of the same sign repel each other. Charges of opposite sign attract.

### Circuits Capacitance of a parallel-plate capacitor : C = κ ε o A / d. (ρ = resistivity, L = length, A = cross-sectional area) Resistance : R = ρ L / A

k = 9.0 x 109 N m2 / C2 e = 1.60 x 10-19 C ε o = 8.85 x 10-12 C2 / N m2 Coulomb s law: F = k q Q / r2 (unlike charges attract, like charges repel) Electric field from a point charge : E = k q / r2 ( towards

### Calculus Relationships in AP Physics C: Electricity and Magnetism

C: Electricity This chapter focuses on some of the quantitative skills that are important in your C: Mechanics course. These are not all of the skills that you will learn, practice, and apply during the

### LECTURE 17. Reminder Magnetic Flux

LECTURE 17 Motional EMF Eddy Currents Self Inductance Reminder Magnetic Flux Faraday s Law ε = dφ B Flux through one loop Φ B = BAcosθ da Flux through N loops Φ B = NBAcosθ 1 Reminder How to Change Magnetic

### Outline of College Physics OpenStax Book

Outline of College Physics OpenStax Book Taken from the online version of the book Dec. 27, 2017 18. Electric Charge and Electric Field 18.1. Static Electricity and Charge: Conservation of Charge Define

### Electromagnetic Induction (Chapters 31-32)

Electromagnetic Induction (Chapters 31-3) The laws of emf induction: Faraday s and Lenz s laws Inductance Mutual inductance M Self inductance L. Inductors Magnetic field energy Simple inductive circuits

### 1. An isolated stationary point charge produces around it. a) An electric field only. b) A magnetic field only. c) Electric as well magnetic fields.

1. An isolated stationary point charge produces around it. a) An electric field only. b) A magnetic field only. c) Electric as well magnetic fields. 2. An isolated moving point charge produces around it.

### Chapter 5: Electromagnetic Induction

Chapter 5: Electromagnetic Induction 5.1 Magnetic Flux 5.1.1 Define and use magnetic flux Magnetic flux is defined as the scalar product between the magnetic flux density, B with the vector of the area,

### SUMMARY Phys 2523 (University Physics II) Compiled by Prof. Erickson. F e (r )=q E(r ) dq r 2 ˆr = k e E = V. V (r )=k e r = k q i. r i r.

SUMMARY Phys 53 (University Physics II) Compiled by Prof. Erickson q 1 q Coulomb s Law: F 1 = k e r ˆr where k e = 1 4π =8.9875 10 9 N m /C, and =8.85 10 1 C /(N m )isthepermittivity of free space. Generally,

### Induction_P1. 1. [1 mark]

Induction_P1 1. [1 mark] Two identical circular coils are placed one below the other so that their planes are both horizontal. The top coil is connected to a cell and a switch. The switch is closed and

This test covers Faraday s Law of induction, motional emf, Lenz s law, induced emf and electric fields, eddy currents, self-inductance, inductance, RL circuits, and energy in a magnetic field, with some

### CHAPTER 29: ELECTROMAGNETIC INDUCTION

CHAPTER 29: ELECTROMAGNETIC INDUCTION So far we have seen that electric charges are the source for both electric and magnetic fields. We have also seen that these fields can exert forces on other electric

### CHAPTER 7 ELECTRODYNAMICS

CHAPTER 7 ELECTRODYNAMICS Outlines 1. Electromotive Force 2. Electromagnetic Induction 3. Maxwell s Equations Michael Faraday James C. Maxwell 2 Summary of Electrostatics and Magnetostatics ρ/ε This semester,

### Physics 420 Fall 2004 Quiz 1 Wednesday This quiz is worth 6 points. Be sure to show your work and label your final answers.

Quiz 1 Wednesday This quiz is worth 6 points. Be sure to show your work and label your final answers. 1. A charge q 1 = +5.0 nc is located on the y-axis, 15 µm above the origin, while another charge q

### ELECTROMAGNETIC INDUCTION AND FARADAY S LAW

ELECTROMAGNETIC INDUCTION AND FARADAY S LAW Magnetic Flux The emf is actually induced by a change in the quantity called the magnetic flux rather than simply py by a change in the magnetic field Magnetic

### Chapter 21 Lecture Notes

Chapter 21 Lecture Notes Physics 2424 - Strauss Formulas: Φ = BA cosφ E = -N Φ/ t Faraday s Law E = Bvl E = NABω sinωt M = (N 2 Φ 2 )/I 1 E 2 = -M I 1 / t L = NΦ/I E = -L I/ t L = µ 0 n 2 A l Energy =

### PHYS 241 EXAM #2 November 9, 2006

1. ( 5 points) A resistance R and a 3.9 H inductance are in series across a 60 Hz AC voltage. The voltage across the resistor is 23 V and the voltage across the inductor is 35 V. Assume that all voltages

### Self-Inductance. Φ i. Self-induction. = (if flux Φ 1 through 1 loop. Tm Vs A A. Lecture 11-1

Lecture - Self-Inductance As current i through coil increases, magnetic flux through itself increases. This in turn induces back emf in the coil itself When current i is decreasing, emf is induced again

### we can said that matter can be regarded as composed of three kinds of elementary particles; proton, neutron (no charge), and electron.

Physics II we can said that matter can be regarded as composed of three kinds of elementary particles; proton, neutron (no charge), and electron. Particle Symbol Charge (e) Mass (kg) Proton P +1 1.67

### Mass of neutron=1.675 X kg. SECTION-A

No. of printed pages:5 INDIAN SCHOOL SOHAR FIRST TERM EXAM- 2015 PHYSICS THEY CLASS: XII MARKS:70 DATE: 15 /9/2015 TIME:3hrs General Instructions: 1. All questions are compulsory. 2. There are 26 questions

### Sliding Conducting Bar

Motional emf, final For equilibrium, qe = qvb or E = vb A potential difference is maintained between the ends of the conductor as long as the conductor continues to move through the uniform magnetic field

### SECOND ENGINEER REG III/2 MARINE ELECTRO-TECHNOLOGY. 1. Understands the physical construction and characteristics of basic components.

SECOND ENGINEER REG III/ MARINE ELECTRO-TECHNOLOGY LIST OF TOPICS A B C D Electric and Electronic Components Electric Circuit Principles Electromagnetism Electrical Machines The expected learning outcome

### Curriculum Interpretation Electricity and Magnetism. Lee Wai Kit

Curriculum Interpretation Electricity and Magnetism Lee Wai Kit Electricity and Magnetism 4.1 Electrostatics 4.2 Circuits and domestic electricity 4.3 Electromagnetism 4.1 Electrostatics electric charges

### Physics by Discovery Standards (2nd Semester)

Physics by Discovery Standards 2017-18 (2nd Semester) 11. Newton's Law of Universal Gravitation UG I can apply the Law of Universal Gravitation Reason about how doubling distance, masses, etc. affect the

### PHYSICS. Chapter 30 Lecture FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E RANDALL D. KNIGHT

PHYSICS FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E Chapter 30 Lecture RANDALL D. KNIGHT Chapter 30 Electromagnetic Induction IN THIS CHAPTER, you will learn what electromagnetic induction is

### FIRST TERM EXAMINATION (07 SEPT 2015) Paper - PHYSICS Class XII (SET B) Time: 3hrs. MM: 70

FIRST TERM EXAMINATION (07 SEPT 205) Paper - PHYSICS Class XII (SET B) Time: 3hrs. MM: 70 Instructions:. All questions are compulsory. 2. Q.no. to 5 carry mark each. 3. Q.no. 6 to 0 carry 2 marks each.

### DEHRADUN PUBLIC SCHOOL I TERM ASSIGNMENT SUBJECT- PHYSICS (042) CLASS -XII

Chapter 1(Electric charges & Fields) DEHRADUN PUBLIC SCHOOL I TERM ASSIGNMENT 2016-17 SUBJECT- PHYSICS (042) CLASS -XII 1. Why do the electric field lines never cross each other? [2014] 2. If the total

### Chapter 30. Inductance

Chapter 30 Inductance Self Inductance When a time dependent current passes through a coil, a changing magnetic flux is produced inside the coil and this in turn induces an emf in that same coil. This induced

### Name: Class: Date: Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.

Name: Class: _ Date: _ w9final Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. If C = 36 µf, determine the equivalent capacitance for the

### ASSOCIATE DEGREE IN ENGINEERING TECHNOLOGY RESIT EXAMINATIONS. SEMESTER 2 July 2012

ASSOCIATE DEGREE IN ENGINEERING TECHNOLOGY RESIT EXAMINATIONS SEMESTER 2 July 2012 COURSE NAME: PHYSICS 2 CODE: GROUP: ADET 1 DATE: July 4, 2012 TIME: DURATION: 1:00 pm 2 HOUR INSTRUCTIONS: 1. This paper

### ITL Public School First - Term( )

Date: 9/09/6 ITL Public School First - Term(06-7) Class: XII Physics(04) Answer key Time: hrs M. M: 70 SECTION-A An ac source of voltage V =V 0 sin ωt is connected to an ideal capacitor. Draw graphs and

### Unit 8: Electromagnetism

Multiple Choice Portion Unit 8: Electromagnetism 1. Four compasses are placed around a conductor carrying a current into the page, as shown below. Which compass correctly shows the direction of the magnetic

### Handout 10: Inductance. Self-Inductance and inductors

1 Handout 10: Inductance Self-Inductance and inductors In Fig. 1, electric current is present in an isolate circuit, setting up magnetic field that causes a magnetic flux through the circuit itself. This

### Physics 2020 Exam 2 Constants and Formulae

Physics 2020 Exam 2 Constants and Formulae Useful Constants k e = 8.99 10 9 N m 2 /C 2 c = 3.00 10 8 m/s ɛ = 8.85 10 12 C 2 /(N m 2 ) µ = 4π 10 7 T m/a e = 1.602 10 19 C h = 6.626 10 34 J s m p = 1.67

### PHYS 202 Notes, Week 6

PHYS 202 Notes, Week 6 Greg Christian February 23 & 25, 2016 Last updated: 02/25/2016 at 12:36:40 This week we learn about electromagnetic induction. Magnetic Induction This section deals with magnetic

### The next two questions pertain to the situation described below. Consider a parallel plate capacitor with separation d:

PHYS 102 Exams Exam 2 PRINT (A) The next two questions pertain to the situation described below. Consider a parallel plate capacitor with separation d: It is connected to a battery with constant emf V.

### Lenz s Law (Section 22.5)

Lenz s Law (Section 22.5) : Thursday, 25 of February 7:00 9:00 pm Rooms: Last Name Room (Armes) Seats A - F 201 122 G - R 200 221 S - Z 205 128 2016-02-21 Phys 1030 General Physics II (Gericke) 1 1) Charging

### MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Physics Spring 2014 Final Exam Equation Sheet. B( r) = µ o 4π

MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Physics 8.02 Spring 2014 Final Exam Equation Sheet Force Law: F q = q( E ext + v q B ext ) Poynting Vector: S = ( E B) / µ 0 Force on Current Carrying

### Physics 1302W.400 Lecture 33 Introductory Physics for Scientists and Engineering II

Physics 1302W.400 Lecture 33 Introductory Physics for Scientists and Engineering II In today s lecture, we will discuss generators and motors. Slide 30-1 Announcement Quiz 4 will be next week. The Final

### University Of Pennsylvania Department of Physics PHYS 141/151 Engineering Physics II (Course Outline)

University Of Pennsylvania Department of Physics PHYS 141/151 Engineering Physics II (Course Outline) Instructor: Dr. Michael A. Carchidi Textbooks: Sears & Zemansky s University Physics by Young and Freedman

### Revision Compare Between. Application

evision Compare etween Points of Comparison Series Connection Parallel Connection Drawing otal resistance ( ) = + + 3 3 Potential Difference () = + + 3 = = = 3 Electric Current (I) I = I = I = I 3 I =

### AP Physics C - E & M

AP Physics C - E & M Electromagnetic Induction 2017-07-14 www.njctl.org Table of Contents: Electromagnetic Induction Click on the topic to go to that section. Induced EMF Magnetic Flux and Gauss's Law

### Physics 208, Spring 2016 Exam #3

Physics 208, Spring 206 Exam #3 A Name (Last, First): ID #: Section #: You have 75 minutes to complete the exam. Formulae are provided on an attached sheet. You may NOT use any other formula sheet. You

### DO PHYSICS ONLINE MOTORS AND GENERATORS FARADAY S LAW ELECTROMAGNETIC INDUCTION

DO PHYSICS ONLINE MOTORS AND GENERATORS FARADAY S LAW ELECTROMAGNETIC INDUCTION English Michael Faraday (1791 1867) who experimented with electric and magnetic phenomena discovered that a changing magnetic

### Demo: Solenoid and Magnet. Topics. Chapter 22 Electromagnetic Induction. EMF Induced in a Moving Conductor

Topics Chapter 22 Electromagnetic Induction EMF Induced in a Moving Conductor Magnetic Flux EMF Induced in a Moving Conductor Demo: Solenoid and Magnet v 1 EMF Induced in a Moving Conductor q Work done

### PHY 131 Review Session Fall 2015 PART 1:

PHY 131 Review Session Fall 2015 PART 1: 1. Consider the electric field from a point charge. As you move farther away from the point charge, the electric field decreases at a rate of 1/r 2 with r being

### Slide 1 / 24. Electromagnetic Induction 2011 by Bryan Pflueger

Slide 1 / 24 Electromagnetic Induction 2011 by Bryan Pflueger Slide 2 / 24 Induced Currents If we have a galvanometer attached to a coil of wire we can induce a current simply by changing the magnetic

### ELECTRO MAGNETIC INDUCTION

ELECTRO MAGNETIC INDUCTION 1) A Circular coil is placed near a current carrying conductor. The induced current is anti clock wise when the coil is, 1. Stationary 2. Moved away from the conductor 3. Moved

### Electricity & Magnetism

Ch 31 Faraday s Law Electricity & Magnetism Up to this point, we ve seen electric fields produced by electric charges... E =... and magnetic fields produced by moving charges... k dq E da = q in r 2 B

### iclicker: which statements are correct?

iclicker: which statements are correct? 1. Electric field lines must originate and terminate on charges 2. Magnetic field lines are always closed A: 1&2 B: only 1 C: only 2 D: neither 2 Inductive E-field:

### PHYSICS : CLASS XII ALL SUBJECTIVE ASSESSMENT TEST ASAT

PHYSICS 202 203: CLASS XII ALL SUBJECTIVE ASSESSMENT TEST ASAT MM MARKS: 70] [TIME: 3 HOUR General Instructions: All the questions are compulsory Question no. to 8 consist of one marks questions, which

### FXA 2008 Φ = BA. Candidates should be able to : Define magnetic flux. Define the weber (Wb). Select and use the equation for magnetic flux :

1 Candidates should be able to : Define magnetic flux. Define the weber (Wb). Select and use the equation for magnetic flux : Φ = BAcosθ MAGNETIC FLUX (Φ) As we have already stated, a magnetic field is

### Magnets. Domain = small magnetized region of a magnetic material. all the atoms are grouped together and aligned

Magnetic Fields Magnets Domain = small magnetized region of a magnetic material all the atoms are grouped together and aligned Magnets Ferromagnetic materials domains can be forced to line up by applying

### AQA Physics A-level Section 7: Fields and Their Consequences

AQA Physics A-level Section 7: Fields and Their Consequences Key Points Gravitational fields A force field is a region in which a body experiences a non-contact force. Gravity is a universal force acting

### /20 /20 /20 /60. Dr. Galeazzi PHY207 Test #3 November 20, I.D. number:

Signature: Name: I.D. number: You must do ALL the problems Each problem is worth 0 points for a total of 60 points. TO GET CREDIT IN PROBLEMS AND 3 YOU MUST SHOW GOOD WORK. CHECK DISCUSSION SECTION ATTENDED:

### Assessment Schedule 2015 Physics: Demonstrate understanding of electrical systems (91526)

NCEA Level 3 Physics (91526) 2015 page 1 of 6 Assessment Schedule 2015 Physics: Demonstrate understanding of electrical systems (91526) Evidence Q Evidence Achievement Achievement with Merit Achievement

### Induction and Inductance

Welcome Back to Physics 1308 Induction and Inductance Michael Faraday 22 September 1791 25 August 1867 Announcements Assignments for Tuesday, November 6th: - Reading: Chapter 30.6-30.8 - Watch Videos:

### Electromagnetic Induction. Bo Zhou Faculty of Science, Hokudai

Electromagnetic Induction Bo Zhou Faculty of Science, Hokudai Oersted's law Oersted s discovery in 1820 that there was a close connection between electricity and magnetism was very exciting until then,

### Describe the forces and torques exerted on an electric dipole in a field.

Learning Outcomes - PHYS 2015 Electric charges and forces: Describe the electrical nature of matter; Explain how an object can be charged; Distinguish between electrical conductors and insulators and the

### Which of the following is the SI unit of gravitational field strength?

T5-2 [122 marks] 1. A cell is connected in series with a 2.0Ω resistor and a switch. The voltmeter is connected across the cell and reads 12V when the switch is open and 8.0V when the switch is closed.

### III.Sources of Magnetic Fields - Ampere s Law - solenoids

Magnetism I. Magnetic Field - units, poles - effect on charge II. Magnetic Force on Current - parallel currents, motors III.Sources of Magnetic Fields - Ampere s Law - solenoids IV.Magnetic Induction -

### Saint Lucie County Science Scope and Sequence

Course: Honors Physics 1 Course Code: 2003390 UNIT 9 TOPIC of STUDY: Electricity STANDARDS: 10: Energy ~The electric force between two charged particles depends upon the size of the charge and the distance

### Exam 2 Solutions. ε 3. ε 1. Problem 1

Exam 2 Solutions Problem 1 In the circuit shown, R1=100 Ω, R2=25 Ω, and the ideal batteries have EMFs of ε1 = 6.0 V, ε2 = 3.0 V, and ε3 = 1.5 V. What is the magnitude of the current flowing through resistor

### Chapter 20: Electromagnetic Induction. PHY2054: Chapter 20 1

Chapter 20: Electromagnetic Induction PHY2054: Chapter 20 1 Electromagnetic Induction Magnetic flux Induced emf Faraday s Law Lenz s Law Motional emf Magnetic energy Inductance RL circuits Generators and

### Welcome to PHY2054C. Office hours: MoTuWeTh 10:00-11:00am (and after class) at PS140

Welcome to PHY2054C Office hours: MoTuWeTh 10:00-11:00am (and after class) at PS140 Book: Physics 8 ed. by Cutnell & Johnson, Volume 2 and PHY2054 Lab manual for your labs. One Midterm (July 14) and final

### Physics Notes for Class 12 chapter 6 ELECTROMAGNETIC I NDUCTION

1 P a g e Physics Notes for Class 12 chapter 6 ELECTROMAGNETIC I NDUCTION Whenever the magnetic flux linked with an electric circuit changes, an emf is induced in the circuit. This phenomenon is called

### Exam 2 Solutions. Note that there are several variations of some problems, indicated by choices in parentheses.

Exam 2 Solutions Note that there are several variations of some problems, indicated by choices in parentheses. Problem 1 Part of a long, straight insulated wire carrying current i is bent into a circular

### Chapter 31. Faraday s Law

Chapter 31 Faraday s Law 1 Ampere s law Magnetic field is produced by time variation of electric field dφ B ( I I ) E d s = µ o + d = µ o I+ µ oεo ds E B 2 Induction A loop of wire is connected to a sensitive

### Chapter 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

### AP Physics Electromagnetic Wrap Up

AP Physics Electromagnetic Wrap Up Here are the glorious equations for this wonderful section. This is the equation for the magnetic force acting on a moving charged particle in a magnetic field. The angle

### Physics GRE: Electromagnetism. G. J. Loges 1. University of Rochester Dept. of Physics & Astronomy. xkcd.com/567/

Physics GRE: Electromagnetism G. J. Loges University of Rochester Dept. of Physics & stronomy xkcd.com/567/ c Gregory Loges, 206 Contents Electrostatics 2 Magnetostatics 2 3 Method of Images 3 4 Lorentz

### Chapter 23 Magnetic Flux and Faraday s Law of Induction

Chapter 23 Magnetic Flux and Faraday s Law of Induction 1 Overview of Chapter 23 Induced Electromotive Force Magnetic Flux Faraday s Law of Induction Lenz s Law Mechanical Work and Electrical Energy Generators