physics for 3 year programme (yr 9, 10 & 11)

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    Proposed Teaching Scheme for Physics Year 9

    Topics SUB-TOPIC OBJECTIVES ACTIVITIES RESOURCES DURATION(WEEKS)

    SECTION 1 - GENERAL PHYSICS 3

    1. PHYSICAL

    QUANTITIESAND UNITS

    MEASUREMENT

    TECHNIQUES

    Describe how to measure avariety of lengths with appropriateaccuracy using tapes, rules,micrometers and calipers using averneir.

    Practical activity:-

    All appropriates instrumentsfor measuring mass, length,time and volume

    http://www.phy.ntnu.edu.tw/ntnujava/viewtopic.php?t=69

    Describe how to measure avariety of time intervals usingclocks and stopwatches

    Practical activity:- Usingstopwatch, pendulum

    Describe how to measure massand weight by using appropriatebalances

    Lever balance & springbalance

    UNITS ANDSYMBOLS

    Recognise and use conventionsand symbols contained in 'signs,Symbols and Systematics.'associations for Science

    Education, 1995 Citation of examples

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    2. KINEMATICS 5

    SPEED,VELOCITY ANDACCELERATION

    State what is meant by speed andvelocity.

    Practical activity:- Tickertimer, ticker tape, trolleys and

    inclined plane

    Calculate average speed usingdistance travelled / time taken.

    State what is meant by uniformacceleration

    http:www.walterfendt.de/ph14e/

    Calculate the value ofacceleration using change invelocity / time-taken

    Calculate the value ofacceleration using change invelocity / time-taken.

    GRAPHICALANALYSIS OFMOTION

    Plot and interpret a speed-timegraph

    Graph plotting

    Recognise shape of a speed-timegraph when body is

    1. at rest

    2. moving with uniform speedand

    3. moving with uniformacceleration

    4. moving with non-uniformacceleration

    Calculate the area under speed-time graph to determine thedistance travelled for motion withuniform speed or uniformacceleration

    Problem solving

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    FREE FALL

    State that the acceleration of free-fall for a body near to the earth isconstant and is approximately 10m/s2.

    Graph sketchesdescribe qualitatively the motionof bodies with constant weightfalling with and without airresistance (including reference toterminal velocity)

    3. DYNAMICS 4

    BALANCED ANDUNBALANCEDFORCES

    State Newton's third law

    Citation of examples

    describe the effect of balancedand unbalanced forces on a body

    Do calculations using the

    equation Force = mass acceleration

    Problem solving

    FRICTION

    Explain the effects of friction onthe motion of the body.

    Citation of examples

    *Discuss the effect of friction onthe motion of a vehicle in thecontext of tyre surface, roadconditions (including skidding),braking force, braking distanceand stopping distance)

    Slide presentation

    CIRCULARMOTION

    Describe qualitatively motion in acircular path due to a constant

    perpendicular force, includingelectrostatic forces on an electronin an atom and gravitationalforces on a satellite, (F = mv2/r isnot required)

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    Discuss how ideas of circularmotion are related to the motionof planets in the solar system

    4. MASS, WEIGHT & DENSITY2

    MASS & WEIGHTState that mass is a measure ofthe amount of substance in abody

    Demonstration

    State that mass of a body resistschange from its state of rest ormotion

    State that a gravitational field is aregion in which mass experiencea force due to gravitationalattraction

    Calculate weight from the

    equation: weight = mass gravitational field strength

    Problem solving

    Explain that two weights, andtherefore masses, can becompared using a balance

    Beam balance

    DENSITY Describe how to use ameasuring cylinder to measurethe volume of solid or liquid

    Measuring cylinder

    Describe experiments todetermine the density of a

    liquid, of a regularly shapedsolid, of an irregularly shapedsolid which sinks in water(method of displacement)

    Practical activity -Plasticine,thread, measuring cylinder,

    eureka can, vernier calipers

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    Make calculations usingformula: density = mass/volume

    Problem solving

    SCALARS ANDVECTORS

    Define the terms scalar andvector

    List the vectors and scalarsfrom distance, displacement,length, speed, velocity, time,acceleration, mass and force

    Citation of examples

    Determine the resultant of twovectors by a graphical method

    construction

    5. TURNING EFFECT OF FORCES 3

    MOMENTS Describe the moment of aforce in terms of its turningeffect and give everydayexamples

    Demonstration: Balancing alever, weights, wedge,metre rule

    State the principle of momentsfor a body in equilibrium

    Make calculations using:

    Problem solving

    1. Moment of a force = force

    perpendicular distance fromthe pivot

    2. the principles of momentsperform and describeexperiment to verify principle ofmoments

    Practical Activity - Meterrule, pin, weights, string,stand, clamp, boss

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    Describe how to determine theposition of the centre of massof a plane lamina

    Practical activity: Thickuniform card, plumbline,stand, clamp, boss

    Describe qualitatively the effectof the position of the centre ofmass on the stability of simpleobjects

    Citation of examples

    6. DEFORMATION 2

    ELASTICDEFORMATION

    state that a force may producea change in size and shape ofa body

    Practical Activity:-Plasticene, spring slottedweight

    plot, draw and interpretextension-load graphs forelastic solids and describe the

    associated experimentalprocedure Graph workRecognise the significance ofthe term 'Limit ofproportionality' for an elasticsolid

    Calculate extensions for anelastic solid usingproportionality

    Problem solving

    7. PRESSURE 2PRESSURE Define the term pressure interms of force and area, anddo calculations using the

    equation: pressure = force

    Problem solving

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    area

    Explain how pressure varieswith force and area in thecontext of everyday examples.

    Citation of examples

    Describe how the height of aliquid column may be used tomeasure the atmosphericpressure

    Barometer

    PRESSURECHANGES

    Explain quantitatively how thepressure beneath a liquidsurfaces changes with depthand density of the liquid in

    appropriate examples

    Citation of examples andproblem solving

    Describe the use of amanometer in themeasurement of pressuredifference

    Manometer

    Describe and explain thetransmission of pressure inhydraulic systems withparticular reference to thehydraulic press and hydraulic

    brakes on vehicles

    Hydraulic model, citation ofexamples, problem solving

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    Describe how a change involume of a fixed mass of gasat constant temperature iscaused by a change in

    pressure applied to the gas

    Citation of examples

    Do calculations using p1v1 =p2v2

    Problem solving

    8. ENERGY, WORK & POWER 3

    ENERGYCONVERSION

    ANDCONSERVATION

    List the different forms ofenergy with examples in whicheach forms occurs

    Citation of simple examples

    state the principle of theconservation of energy andapply this principle to the

    conversion of energy from oneform to another

    Application of examples

    State that kinetic energy Ek =1/2 mv2and that potentialenergy Ep = mgh and usethese equations in calculations

    Problem solving

    MAJORSOURCES OFENERGY

    List renewable and non-renewable energy sources

    Citation of simple examples

    Describe quantitively theprocesses of the followingsources of energy beingconverted from one form toanother:

    Group Presentation(project)

    1. chemical/fuel energy (aregrouping of atoms)

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    2. hydroelectric generation(emphasising the mechanicalenergies involved)

    3. Solar energy (nuclei ofatoms in the Sun)

    4. nuclear energy

    5. geothermal energy

    6. wind energy

    Explain nuclear fusion andfission in terms of energyreleasing processes

    Do calculations using themass-energy equation E = mc2

    Problem solving

    Descibe the process ofelectricity generation and drawa block diagram of the processfrom the fuel input to electricityoutput

    BLOCK DIAGRAMDRAWING

    Descibe the environmentalissues associated with powergeneration

    Class Project

    WORK Calculate workdone from theformula work = force

    distance moved in theline of action of the force

    Problem solving

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    EFFICIENCY

    Calculate the efficiency of theenergy conversion using theformula: Energy = energyconverted to the required

    form / total energy output

    Problem solving

    Discuss the efficiency ofenergy conversions in commonuse, particularly those givingelectrical output

    citation of examples

    Discuss the usefulness of theenergy output from a numberof energy conversions

    citation of examples

    POWERcalculate power from theformula: power = workdone /

    time taken

    Problem solving

    9. TRANSFER OF THERMAL ENERGY 2

    CONDUCTION

    Describe experiments on howto distinguish between goodand bad conductors of heat Demonstration: Conduction

    kits

    Describe in molecular termshow heat transfer occurs insolids

    CONVECTIONDescribe convection in fluids interms of density changes

    Demonstration: Convectionkits

    RADIATION Describe the process of heattransfer by radiation.

    Demonstration: RadiationKits

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    Describe how to distinguishbetween good and bademitters and good and badabsorbers on infra-red

    radiation

    TOTALTRANSFER

    Describe how heat istransferred to or from abuildings and to or from a room

    citation of examples

    State and explain the use ofthe important practicalmethods of heat insulation forbuildings.

    10. TEMPERATURE 2

    9.1 PRINCIPLESOFTHERMOMETRY

    Explain how a physical

    property which vary withtemperature being used for themeasurement of temperatureand state examples of suchproperties

    Thermometer model

    Explain the need for fixedpoints and state what is meantby the ice-point and steampoint

    Discuss sensitivity, range andlinearity of thermometers

    describe how a given propertyis used to measuretemperature

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    LIQUID-IN-

    GLASSTHERMOMETER

    Describe the structure andaction of liquid-in-glassthermometers (includingclinical) and of a thermocouple

    thermometer, showing anappreciation of its use formeasuring high temperaturesand those which vary rapidly.

    Laboratory and clinical

    thermometer, andthermocouple

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    PROPOSED TEACHING SCHEME FOR PHYSICS (5054) YEAR 10

    TOPICS SUB-TOPICS OBJECTIVES ACTIVITIES RESOURCESDURATION(WEEKS)

    11. THERMAL PROPERTIES OF MATTER 5SPECIFIC HEATCAPACITY

    Describe a rise in temperatureof a body in terms of anincrease in its internal energy(random thermal energy) Slide presentationDescribe the terms heatcapacity and specific heatcapacity

    calculate heat transferredusing the formula thermalenergy = mass x specificheat capacity x change intemperature

    Problem solving

    Describe melting / solidificationand boiling / condensation interms of energy transferwithout the change intemperature.

    Slide presentation

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    MELTING ANDBOILING

    state the meaning of meltingpoint and boiling point

    BOILING ANDEVAPORATION

    Explain the differencebetween boiling andevaporation

    SPECIFICLATENT HEAT

    define the terms latent heatand specific latent heat

    Explain latent heat in terms ofmolecular behaviour

    calculate heat transferred inthe change of state using theformula thermal energy =mass x specific latent heat

    Problem solving

    THERMALEXPANSION OFSOLIDS,LIQUIDS ANDGASES

    Describe qualitatively thethermal expansion of solids,liquids and gases

    Slide presentation

    describe the relative order ofmagnitude of the expansion ofsolids, liquids and gases

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    Identify and explain some ofthe everday applications andconsequences of thermal

    expansion

    Citation of examples

    Describe qualitatively the effectof a change of temperature onthe volume of gas at constantpressure.

    Graph work

    12. KINETIC MODEL OF MATTER 2

    STATES OFMATTER

    State the distinguishingproperties of solids, liquids and

    gases

    Slide presentation anddemonstration

    MOLECULARMODEL Describe qualitatively the

    molecular structure of solids,liquids and gases, relating theirproperties to the forces anddistances between moleculesand to the motion of molecules

    Describe the relationship

    between the motion of themolecules and temperature.

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    Explain the pressure of a gasin terms of the motion of itsmolecules

    EVAPORATION

    describe evaporation in termsof the escape of moreenergetic molecules from thesurface of a liquid

    describe how temperature,surface area and draught overa surface influence evaporation

    explain that evaporationcauses cooling

    13. GENERAL WAVE PROPERTIES 3

    DESCRIBINGWAVE MOTION

    Describe what is meant bywave motion as illustrated byvibration in ropes, springs andby experiments using a rippletank

    Slinky spring, ripple tank

    WAVE TERMS state what is meant by the term

    wavefront

    Slide Presentation

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    Define the terms speed,frequency, wavelength andamplitude and do calculation

    using c = f

    Wave drawing & problemsolving

    WAVEBEHAVIOUR

    Describe longitudinal andtranverse waves in such a wayas to illustrate the differencesbetween them

    Slinky spring, ripple tank

    describe the use of a rippletank to show

    1. reflection at a plane surface

    2. refraction due to a change inspeed at constant frequency

    describe simple experiments toshow the reflection andrefraction of sound waves

    Signal generator,Microphone, tube, C.R.O.,balloon filled with carbondioxide gas

    14. LIGHT 4REFLECTION OFLIGHT Define the terms used in

    reflection including normal,angle of incidence and angle of

    reflection

    Practical activity: Ray-box,plane mirror, Optical pins,Constructions, anglemeasurement & Problemsolving

    Describe an experiment toillustrate the laws of reflection

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    Describe an experiment to findthe position and characteristicsof an optical image formed by

    a plane mirror

    state that for reflection, theangle of incidence is equal tothe angle of reflection and usethis in constructions,measurements andcalculations

    REFRACTIONOF LIGHT Define the terms used in

    refraction including angle of

    incidence, angle of refractionand refractive index Practical Activity: Ray-box,glass blocks, Light rayconstruction, drawing paper

    Describe experiments to showrefraction of light through glassblocks

    Use equation sin i / sin r = n(refractive index)

    Problem solving

    Define the terms critical angleand total internal reflection

    Semicircular glass block,ray box

    Describe experiments to showtotal internal reflection

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    Describe the use of opticalfibres in telecommunicationsand state the advantanges of

    their use.

    THINCONVERGINGLENS

    Describe the action of a thinconverging lens on a beam oflight

    Practical Activity: Convexand concave lenses, raybox

    Define the term focal length

    *Draw ray diagrams to illustratethe formation of real and virtualimages of an object by lens

    construction

    Define the terms linearmagnification and *draw scalediagrams to determine thefocal length needed forparticular values ofmagnification (converging lensonly)

    construction

    Describe the use of a singlelens as a magnifying glass andin a camera, projector andphotographic enlarger and

    draw ray diagrams to showhow each forms an image

    construction

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    Draw ray-diagrams to showformation of images in thenormal eye, a short-sighted

    eye and a long-sighted eye Ray diagram construction

    Describe the correction ofshort-sighted and long sighted

    TOPIC 18: STATIC ELECTRICITY 2

    LAWS OF

    ELECTROSTATICS

    Describe experiments to showelectrostatic charging byfriction.

    Electrostatics Kit

    Explain that charging of solids

    involves a movement ofelectrons.

    State that there are positiveand negative charges and thatcharge is measured incoulombs.

    State that unlike chargesattract and like charges repel.

    Principles of

    electrostatics

    Describe an electric field as a

    region in which an electriccharge experiences a force.

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    State the direction of lines offorce and describe simple fieldpatterns.

    Describe the separation ofcharges by induction.

    Discuss the differencesbetween electrical conductorsand insulators and stateexamples of each.

    Citation of examples

    Applications ofelectrostatics

    state what is meant by

    "earthing" a charged object.

    Describe examples wherecharging could be a probleme.g. lightning

    Citation of examples

    Describe examples wherecharging is helpful e.g'sphotocopier and electrostaticprecipitator.

    Citation of examples

    TOPIC 19: CURRENT ELECTRICITY 4Current State that a current is a flow of

    charge and that current ismeasured in amperes.

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    Do calculations using theequation charge = current xtime.

    Problem solving

    Describe the use of anammeter with different ranges.

    ammeter, milliammeter,multimeter

    Electromotiveforce

    Explain that electromotiveforce (e.m.f.) is measured bythe energy dissipated by asource in driving a unit chargearound a complete circuit.

    State that e.m.f. is work

    done/charge.

    Problem solving

    Electromotiveforce

    State that the volt is given byJ/C.

    Problem solving

    Calculate the total e.m.f. whereseveral sources are arrangedin series and discuss how thisis used in the design ofbatteries.

    Discuss the advantage of

    making a battery from severalequal voltage sources of e.m.f.arranged in parallel.

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    Potentialdifference

    State that the potentialdifference across a circuitcomponent is measured involts.

    state that the p.d. across acomponent in a circuit is givenby the work done in thecomponent/charge passedthrough the component

    (k) describe the use of avoltmeter with different ranges.

    Voltmeter, multimeter

    Resistance

    State that resistance =p.d./current and use theequation resistance =voltage/current incalculations.

    Problem solving

    Describe an experiment tomeasure the resistance of ametallic conductor using avoltmeter and an ammeter andmake the necessary

    calculations.

    Voltmeter, leads, ammeter,variable resistors, battery &Problem solving

    Discuss the temperaturelimitation on Ohm's Law.

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    *use quantitatively theproportionality betweenresistance and the length andthe crosssectional area of a

    wire.

    I.T. Presentation

    Calculate the net effect of anumber of resistors in seriesand in parallel.

    Problem solving

    Resistance

    Describe the effect oftemperature increase on theresistance of a resistor and afilament lamp and draw therespective sketch graphs of

    current/voltage.

    Graph work

    Describe the operation of alight-dependent resistor.

    Light dependeng resistor

    TOPIC 20: D.C. CIRCUITS 3

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    Current andpotential

    difference incircuits

    *Draw circuit diagrams withpower sources (cell, battery ora.c. mains), switches (closedand open), resistors (fixed andvariable), light dependentresistors, lamps, ammeters,voltmeters, magnetising coils,bells, fuses, relays, light-emitting diodes and

    IT Presentation

    Series andparallel circuits

    State that the current at everypoint in a series circuit is thesame, and use this incalculations.

    Problem solving

    Difference across the wholecircuit and use this incalculations. State that the current from thesource is the sum of thecurrents in the separatebranches of a parallel circuit.

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    Do calculations on the wholecircuit, recalling and usingformulae including R = V/I and

    of a parallel circuit.

    TOPIC 21: PRACTICAL ELECTRICITY 2

    Uses of electricity

    Describe the use of electricityin heating, lighting and motors.

    Citation of examples

    Do calculations using theequations power = voltage xcurrent, and energy = voltagex current x time.

    Problem solving

    Calculate the cost of usingelectrical appliances where theenergy unit is the kWh.

    Dangers ofelectricity

    State the hazards of damagedinsulation, overheating ofcables and damp conditions.

    Citation of examples

    Safe use of

    electricity in thehome

    Explain the use of fuses and

    circuit breakers and fuseratings and circuit breakersettings.

    Fuses, circuit breaker 2

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    Explain the need for earthingmetal cases and for doubleinsulation.

    State the meaning of the termslive, neutral and earth.

    Describe how to wire a mainsplug.

    3-pin plug

    Explain why switches, fusesand circuit breakers are wiredinto the live conductor.

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    PROPOSED TEACHING SCHEME FOR PHYSICS (5054) YEAR 11

    TOPICS SUB-TOPICS OBJECTIVES ACTIVITIES RESOURCESDURATION(WEEKS)

    TOPIC 22: ELECTROMAGNETISM 3

    Force on a

    current-carryingconductor

    Describe experiments to showthe force on a current-carryingconductor, and on a beam ofcharged particles, in amagnetic field, including theeffect of reversing (1) the

    current, (2) the direction of thefield.

    d.c power supply, insulatedtong wire, major magnet

    State the relative directions offorce, field and current.

    Force on acurrent-carrying

    conductor

    Describe the field patternsbetween currents in parallelconductors and relate these tothe forces which exist betweenthe conductors (excluding theEarth's field).

    Vertical parallel thick wire,low voltage power supply

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    The d.c. motor

    Explain how a current-carryingcoil in a magnetic fieldexperiences a turning effectand that the effect is increased

    by increasing (1) the number ofturns on the coil (2) the current.

    Discuss how this turning effectis used in the action of anelectric motor.

    d.c. power supply, d.c.motor

    Describe the action of a split-ring commutator in a two-pole,single coil motor and the effectof winding the coil onto a soft-iron cylinder.

    model of d.c. motor

    TOPIC 23: ELECTROMAGNETIC INDUCTION 3Principles of

    electromagneticinduction

    Describe an experiment whichshows that a changingmagnetic field can induce ane.m.f. in a circuit.

    Galvanometer, permanentmagnet and Solenoid

    State the factors affecting themagnitude of the inducede.m.f.

    State that the direction of acurrent produced by an

    induced e.m.f. opposes thechange producing it (Lenz'sLaw) and describe how this lawmay be demonstrated.

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    The a.c.generator

    Describe a simple form of a.c.generator (rotating coil orrotating magnet) and the use ofslip rings where needed.

    Dynamo

    *Sketch a graph of voltageoutput against time for a simplea.c. generator.

    The transformer

    Describe the structure andprinciple of operation of asimple iron-cored transformer.

    transformer model

    State the advantages of highvoltage transmission.

    Discuss the environmental and

    cost implications ofunderground powertransmission compared tooverhead lines.

    24. Introductory Electronics 4

    Thermionicemission State that electrons are emitted

    by a hot metal filament.

    Explain that to cause acontinuous flow of emittedelectrons requires (1) high

    positive potential and (2) verylow gas pressure.

    Describe the deflection of anelectron beam by electric fields

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    and magnetic fields.State that the flow of electrons(electron current) is fromnegative to positive and is inthe opposite direction toconventional current

    Simple treatmentof cathode-rayoscilloscope

    Describe in outline the basicstructure and action of acathode-ray oscilloscope(detailed circuits are notrequired).

    Demonstration of CRO

    Describe the use of a cathode-ray oscilloscope to display

    waveforms and to measurep.d.'s and short intervals oftime (detailed circuits are notrequired).

    Action and use ofcircuit

    components

    Explain how the values ofresistors are chosen accordingto a colour code and whywidely different values areneeded in different types ofcircuit.

    Discuss the need to choose

    components with suitablepower ratings.

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    Describe the action ofthermistors and light-dependent resistors andexplain their use as input

    sensors.

    Demonstration of LDR

    Describe the action of avariable potential divider(potentiometer).

    Demonstration ofpotentiometer

    Describe the action of acapacitor as a charge storeand explain its use in timedelay circuits.

    Demonstration ofCapacitors, reed switch andreed relay

    Describe the action of a reedswitch and reed relay.

    Explain the use of reed relaysin switching circuits.

    Describe and explain circuitsoperating as light-sensitiveswitches and temperatureoperated alarms (using a reedrelay or other circuits).

    State the meaning of the termsprocessor, output device andfeedback.

    TOPIC 25: ELECTRONIC SYSTEMS 2

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    Switching andlogic circuits

    Describe the action of a bipolarnpn transistor as an electricallyoperated switch and explain itsuse in switching circuits.

    Handson Electronic LogicKit

    *ElectronicSystems areOptional topic

    State in words and in truthtable form, the action of thefollowing logic gates, AND,OR, NAND, NOR andNOT(inverter).

    State the symbols for the logicgates listed above (AmericanANSI Y 32.14 symbols will beused).

    Bistable andastable circuits

    Describe the use of a bistablecircuit.

    Discuss the fact that bistablecircuits exhibit the property ofmemory.

    Describe the use of an astablecircuit (pulse generator).

    Describe how the frequency ofan astable circuit is related tothe values of the resistive andcapacitative components.

    SECTION VI ATOMIC PHYSICS TOPIC 26. RADIOACTIVITY 4

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    Detection ofradioactivity

    Describe the detection ofalpha-particles, beta-particlesand gamma-rays byappropriate methods. 3 Radioactive resources

    Characteristics ofthe three types of

    emission

    State and explain the randomemission of radioactivity indirection and time.

    State, for radioactiveemissions, their nature, relativeionising effects and relativepenetrating powers.

    IT Presentation

    Describe the deflection ofradioactive emissions inelectric fields and magneticfields.Explain what is meant byradioactive decay.

    Nuclear reactions

    Explain the processes of fusionand fission.Describe with the aid of a blockdiagram one type of fissionreactor for use in a powerstation.

    Discuss theories of starformation and their energy

    production by fusion.Half-li fe Explain what is meant by the

    term half-life.

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    Make calculations based onhalf-life which might involveinformation in tables or shownby decay curves.

    Uses ofradioactive

    isotopes includingsafety

    precautions

    Describe how radioactivematerials are handled, usedand stored in a safe way.

    Discuss the way in which thetype of radiation emitted andthe half-life determine the usefor the material.

    Discuss the origins and effectof background radiation.

    Discuss the dating of objects

    by the use of14C.

    TOPIC 27: THE NUCLEAR ATOM 2

    Atomic model

    Describe the structure of theatom in terms of nucleus andelectrons.

    IT Presentation

    Describe how the Geiger-Marsden alpha-particlescattering experiment providesevidence for the nuclear atom.

    Nucleus Describe the composition of

    the nucleus in terms of protonsand neutrons.

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    Define the terms protonnumber (atomic number), Zand nucleon number (massnumber), A.

    Explain the term nuclide anduse the nuclide notation AZ X toconstruct equations whereradioactive decay leads tochanges in the composition ofthe nucleus.

    Define the term isotope.

    Explain, using nuclide notation,how one element may have anumber of isotopes.

    ANY QUERIES PLEASE REFER TO MOHD KHAIRUL AZMI BIN KASSIM MAKTAB SAINS PADUKA SERI BEGAWAN

    SULTAN

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