Curriculum Interpretation Electricity and Magnetism. Lee Wai Kit

Similar documents
5. ELECTRIC CURRENTS

Revision checklist SP10. SP10 Electricity and Circuits. SP10a Electric circuits. SP10b Current and potential difference

4.2.1 Current, potential difference and resistance

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

4.2.1 Current, potential difference and resistance Standard circuit diagram symbols. Content. Key opportunities for skills development WS 1.

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

Standard circuit diagram symbols Content Key opportunities for skills development

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

AP Physics C. Magnetism - Term 4

Revision Compare Between. Application

r where the electric constant

Sol: Semiconductor diode.

PhysicsAndMathsTutor.com

Electromagnetism IB 12

CURRENT-CARRYING CONDUCTORS / MOVING CHARGES / CHARGED PARTICLES IN CIRCULAR ORBITS

SECTION 3 BASIC AUTOMATIC CONTROLS UNIT 12 BASIC ELECTRICITY AND MAGNETISM

a) head-on view b) side view c) side view Use the right hand rule for forces to confirm the direction of the force in each case.

Read Chapter 7; pages:

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 Written and composed by: Prof. Muhammad Ali Malik (M. Phil. Physics), Govt. Degree College, Naushera

AP Physics C. Electricity - Term 3

Chapter 21 Magnetic Induction Lecture 12

Outline of College Physics OpenStax Book

5. Positive charges one another.

MAGNETISM. Magnet. When a piece of material is brought close to or stroked by a magnet, the material itself becomes magnetic.

ELECTRICITY AND MAGNETISM

Physics Module Form 5 Chapter 2- Electricity GCKL 2011 CHARGE AND ELECTRIC CURRENT

S/N PHYSICS 5059 SCIENCE (PHYSICS) 5076 / 5077

YEAR 11- Physics Term 1 plan

EXEMPLAR NATIONAL CERTIFICATE (VOCATIONAL) ELECTRICAL PRINCIPLES AND PRACTICE NQF LEVEL 3 ( ) (X-Paper) 09:00 12:00

TSOKOS LSN 5-1 TO 5-5 TEST REVIEW

Physics Module Form 5 Chapter 2- Electricity GCKL 2011 CHARGE AND ELECTRIC CURRENT

1 Written and composed by: Prof. Muhammad Ali Malik (M. Phil. Physics), Govt. Degree College, Naushera

AP Physics C - E & M

Electricity & Optics

fusion production of elements in stars, 345

CLASS X- ELECTRICITY

Physics 1214 Chapter 19: Current, Resistance, and Direct-Current Circuits

Induction_P1. 1. [1 mark]

MASTER SYLLABUS

Physics by Discovery Standards (2nd Semester)

ALI RAZA KAMAL EXERCISE NOTES

Electrics. Electromagnetism

Module 3 Electrical Fundamentals

r where the electric constant

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

Current in a Magnetic Field Learning Outcomes. Force on a Current-Carrying Conductor

MAGNETIC EFFECT OF AN ELECTRIC CURRENT

Magnetism is associated with charges in motion (currents):

Physics for Scientists and Engineers 4th Edition 2017

Physics 2020 Exam 2 Constants and Formulae

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

PHY 102: Notes. FBDs and Buoyancy: How does one solve problems?

Chapter 18. Direct Current Circuits

Insulators Non-metals are very good insulators; their electrons are very tightly bonded and cannot move.

Electric Charge. Electric Charge ( q ) unbalanced charges positive and negative charges. n Units Coulombs (C)

Sliding Conducting Bar

UNIT II CURRENT ELECTRICITY

Chapter 27, 28 & 29: Magnetism & Electromagnetic Induction. Magnetic flux Faraday s and Lenz s law Electromagnetic Induction Ampere s law

Material World Electricity and Magnetism

PHYSICS FORM 5 ELECTRICAL QUANTITES

Revision Guide for Chapter 2

7.1 ANALYSING ELECTRIC FIELDS AND CHARGE FLOW

ELECTRICITY UNIT REVIEW

Preliminary Course Physics Module 8.3 Electrical Energy in the Home Summative Test. Student Name:

1 Fig. 3.1 shows the variation of the magnetic flux linkage with time t for a small generator. magnetic. flux linkage / Wb-turns 1.

The object experiencing the field is called the TEST OBJECT

Section 1 Electric Charge and Force

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

9. Which of the following is the correct relationship among power, current, and voltage?. a. P = I/V c. P = I x V b. V = P x I d.

PHYSICS. Downloaded From: Time Allowed : 3 Hrs. Max. Marks 60

MULTIPLE 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.

4.7.1 Permanent and induced magnetism, magnetic forces and fields. Content Key opportunities for skills development

GRADE 11F: Physics 4. UNIT 11FP.4 10 hours. Current electricity. Resources. About this unit. Previous learning. Expectations

1. What is heating effect of current? What is its cause?

Electron Theory of Charge. Electricity. 1. Matter is made of atoms. Refers to the generation of or the possession of electric charge.

6. In a dry cell electrical energy is obtained due to the conversion of:

Revision Guide for Chapter 15

Big idea (age 11-14) PEM: Electricity and magnetism

Electromagnetic Induction

Renewable Energy Systems

AS PHYSICS. Electricity Homework Questions. moulsham high school

Electric charge is conserved the arithmetic sum of the total charge cannot change in any interaction.

Chapter 1: Electrostatics

IM Syllabus (2015): Physics IM SYLLABUS (2015) PHYSICS IM 26 SYLLABUS

Physics 112. Study Notes for Exam II

CHAPTER 5 ELECTROMAGNETIC INDUCTION

An ion follows a circular path in a uniform magnetic field. Which single change decreases the radius of the path?

Chapter 12. Magnetism and Electromagnetism

Version The diagram below represents lines of magnetic flux within a region of space.

Answers to examination-style questions. Answers Marks Examiner s tips. any 3

4.7 Magnetism and electromagnetism

Physics - Grade 12. Revision Sheet for the Final Exam / Second Term. Academic Year: 2018/2019. Student s Name:.. Date: /3/2018

AQA Physics Checklist

UNIVERSITY OF TECHNOLOGY, JAMAICA Faculty of Engineering and Computing School of Engineering

AP Physics C Mechanics Objectives

PHYSICS ASSIGNMENT ES/CE/MAG. Class XII

Electromagnetism Checklist

Calculus Relationships in AP Physics C: Electricity and Magnetism

Transcription:

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 E-field electric potential

Electric Charge Student should able to examine the evidence for two kinds of charges in nature realise the attraction and repulsion between charges Gold leaf electroscope could be used as an instrument to demonstrate repulsion and attraction between like/unlike charges. Concept of conductor and insulator is required

Electric Charge Student should able to interpret charging in terms of electron transfer solve problems involving forces between point charges Charging by sharing and induction is required Quantitative treatment of Coulomb s law required Addition of forces* due to the interaction of point charges by Coulomb s law is required

Electric Field Student should able to describe the electric field around a point charge and between parallel charged plates represent an electric field using field lines explain how charges interact via an electric field Experiments involving shuttle ball and foil strip could be used to demonstrate electric force and field Point action is not required Charge distribution on a metal sphere and parallel plates is required Charge distribution on an irregular shaped metal surface is not required

Electric Field Student should able to define electric field strength at a point as the force per unit charge on a positive test charge placed at that point solve problems involving electric field strength around a point charge and between parallel charged plates Field strength E considered as force per unit charge Calculate resultant force of a moving charged particle in a electric field is required Analogy with Gravitational field is not required

Electric Potential Student should able to use the convention that the electric potential energy at infinity is zero define the electric potential at a point as the electric potential energy per unit charge of a positive test charge placed at that point state the electric potential around a point charge V = Q/4πεr and solve related problems L Experiment to demonstrate lines of equal potential is encouraged Flame probe is not required Electrical potential of any earthed points is assigned to be at zero potential (simple circuits) Quantitative treatment of electric potential and electric field strength around point charges and parallel plate is required

Electric Potential Student should able to derive for parallel plates and solve related problems E =V/d relate electric field strength to the negative gradient of potential Relate electric potential and electric field strength by the negative potential gradient * * Mathematics skills slope and gradient Compulsory Part in Math 12. Equations of straight lines and circles slope of a straight line

Circuit and Domestic electricity Electric current Electrical energy and e.m.f. Resistance Series and parallel circuits Simple circuits Electrical power Domestic electricity

Electric current Student should able to define electric current as the rate of flow of electric charges state the convention for the direction of electric current treatment as HKCEE definition of the unit for current, ampere as one coulomb per second SI unit of current in Ampere (A) is required

Electrical energy and electromotive force describe the energy transformations in electric circuits define the potential difference (p.d.) between two points in a circuit as the electric potential energy converted to other forms per unit charge passing between the points outside the source define the electromotive force (e.m.f.) of a source as the energy imparted by the source per unit charge passing through it Same treatment as HKCEE

resistance define resistance R =V/I describe the variation of current with applied p.d. in metal wires, electrolytes, filament lamps and diodes realise Ohm s law as a special case of resistance behaviour determine the factors affecting the resistance of a wire and define its resistivityρ=ra/ l describe the effect of temperature on resistance of metals and semiconductors Demonstration of the variation of current with applied p.d. in various conductors and circuit elements (metals, a filament bulb, electrolyte, thermistors and diodes) is encouraged

Series and parallel circuit compare series and parallel circuits in terms of p.d. across the components of each circuit and the current through them derive the resistance combinations in series and parallel R = R 1 + R 2 +... for resistors connected in series 1/R =1/R 1 + 1/R 2 +... for resistors connected in parallel Quantitative problem involving simple parallel and series circuits is required The concept of the conservation of charge and energy of a closed circuit is required

Simple circuit measure I, V and R in simple circuits assign the electrical potential of any earthed points as zero compare the e.m.f. of a source and the terminal voltage across the source experimentally and relate the difference to the internal resistance of the source solve problems involving simple circuits Digital multimeters could be used to measure current (A), voltage (V) and resistance ( ). The structure of ammeter and voltmeter, and operation principles is not required Loading effect of ammeter and voltmeter on measurement is required Potentiometer used as a potential divider is required as an application Problem to convert an ammeter by using a shunt or a multiplier is not required Concept of internal resistance of a power supply (e.g. battery) is required

Electrical power Student should able to examine the heating effect when a current passes through a conductor apply P = VI to solve problems Calculate the power rating and maximum possible current of an appliance is required Applying V=IR and P=VI to solve numerical problem is required

Domestic electricity determine the power rating of electrical appliances use kilowatt-hour (kwh) as a unit of electrical energy calculate the costs of running various electrical appliances understand household wiring and discuss safety aspects of domestic electricity determine the operating current for electrical appliances discuss the choice of power cables and fuses for electrical appliances based on the power rating Same treatment as HKCEE Understanding of household wiring and discussing of safety aspects (e.g. live / neutral / earth wires) is required Function of earth wire to prevent electric shock is required Fuse and circuit breaker could be used as a safety device and detailed structure is not required

Domestic electricity determine the operating current for electrical appliances discuss the choice of power cables and fuses for electrical appliances based on the power rating Calculation of the running cost of electric appliances is required Ring circuit in domestic electricity is required

Electromagnetism magnetic force and field magnetic effect of current Current carrying conductor in magnetic field Hall effect electromagnetic induction a.c. transformer

magnetic force and B field realise the attraction and repulsion between magnetic poles examine the magnetic field in the region around a magnet describe the behaviour of a compass in a magnetic field represent magnetic field using field lines Plotting compass, hall probe, current balance, search coil (and CRO) could be used to examine magnetic field

magnetic effect of current realise the existence of a magnetic field due to moving charges or electric currents examine the magnetic field patterns associated with currents through a long straight wire, a circular coil and a long solenoid Use Tesla (T) as a unit of magnetic flux density B

magnetic effect of current apply B =μ o I/2πr and B = μ o NI/ l to represent the magnetic fields around a long straight wire, and inside a long solenoid carrying current, and solve related problems examine the factors affecting the strength of an electromagnet Numerical problem involving magnetic fields around a straight wire, and inside a long solenoid carrying current is required Derivation of the equations B =μ o I/2πr and B = μ o NI/ l by ampere s law is not required

Current carrying conductor in magnetic field examine the existence of a force on a currentcarrying conductor in a magnetic field and determine the relative directions of force, field and current determine the factors affecting the force on a straight current-carrying wire in a magnetic field and represent the force by F = BIl sinθ Quantitative treatment of the force between currents in long straight parallel conductors is required Define ampere in terms of force between currents in long straight parallel wires is required Turning moment* (torque) of a current carry coil in magnetic field is required Current balance is required

Current carrying conductor in magnetic field define ampere in terms of the force between currents in long straight parallel wires determine the turning effect on a current-carrying coil in a magnetic field describe the structure of a simple d.c. motor and how it works solve problems involving current-carrying conductors in a magnetic field Principles of design/structure and operation of a moving coil galvanometer is not required Calculate resultant force of a moving charged particle in a magnetic field is required Relative directions of force, field and current is required * Moment of a force is introduced in the Compulsory Part - Force and Motion

Hall effect derive the relation I = navq between electron drift velocity and current represent the force on a moving charge in a magnetic field by F = BQv sinθ derive Hall voltage V H = BI / nqt examine magnetic fields using a Hall probe apply I = navq, F= BQv sinθ and V H = BI / nqt to solve problems Calculate drift velocity of electron as a charge carrier is required Relative directions of force, field and velocity is required Both positive and negative charge carriers are required Calculate resultant F of a moving charged particle in a magnetic field is required Numerical problem on V H is required Motion of a charged particle (circular motion) in a magnetic field is required

Electromagnetic induction examine induced e.m.f. resulting from a moving conductor in a steady magnetic field or a stationary conductor in a changing magnetic field apply Lenz s law to determine the direction of induced e.m.f./current define magnetic flux Φ= BA cos θ Define weber (Wb) as a unit of magnetic flux which is given by Φ = BA Use CRO as a meter/detector in practical work is encouraged. The detailed structure of CRO is not required Induction cooking is an example of practical uses of eddy currents

Electromagnetic induction interpret magnetic field B as magnetic flux density State Faraday's Law as ε=- ΔΦ/Δt and apply it to calculate the average induced e.m.f. examine magnetic fields using a search coil describe the structures of simple d.c. and a.c. generators and how they work discuss the occurrence and practical uses of eddy currents Numerical problem on the application of Faraday s law is required

a.c. distinguish between direct currents (d.c.) and alternating currents (a.c.) define r.m.s. of an alternating current as the steady d.c. which converts electric potential energy to other forms in a given pure resistance at the same rate as that of the a.c. relate the r.m.s. and peak values of an a.c. Mathematic skill Compulsory Part in Math -13. More about Trigonometry 13.1 understand the functions sine, cosine and tangent, and their graphs and properties, including maximum and minimum values and periodicity

Transformer describe the structure of a simple transformer and how it works relate the voltage ratio to turn ratio by Vp/ Vs = Np / Ns and apply it solve problems examine methods for improving the efficiency of a transformer Same treatment as HKCEE Ohmic loss and eddy current loss is required

High voltage transmission of electrical energy discuss the advantages of transmission of electrical energy with a.c. at high voltages describe various stages of stepping up and down of the voltage in a grid system for power transmission Same treatment as HKCEE

The end