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| WK | LSN | TOPIC | SUB-TOPIC | OBJECTIVES | T/L ACTIVITIES | T/L AIDS | REFERENCE | REMARKS |
|---|---|---|---|---|---|---|---|---|
| 1 |
Reporting and Revision of End of term 1 exam |
|||||||
| 2 | 1 |
Work, Energy, Power and Machines
|
Sources of Energy
|
By the end of the
lesson, the learner
should be able to:
Identify different sources of energy -Distinguish between renewable and non-renewable energy sources -Classify energy sources into appropriate categories -Discuss advantages and disadvantages of different energy sources -Understand energy crisis and conservation needs |
In groups, learners are guided to:
Q/A on energy experiences in daily life -Discussion on various energy sources students know -Classification activity: renewable vs non-renewable -Group work on energy source advantages/disadvantages -Presentation on local energy sources in Kenya -Discussion on energy conservation importance |
Charts showing energy sources
-Pictures of solar panels, wind mills -Samples: coal, wood, batteries -Energy source classification cards -Local energy examples -Conservation posters |
KLB Secondary Physics Form 3, Pages 93-95
|
|
| 2 | 2 |
Work, Energy, Power and Machines
|
Forms of Energy
|
By the end of the
lesson, the learner
should be able to:
Define different forms of energy -Identify chemical, mechanical, heat, electrical, and wave energy -Give examples of each form of energy -Understand energy exists in various forms -Relate forms of energy to daily experiences |
In groups, learners are guided to:
Review energy sources through Q/A -Introduction to different forms of energy -Demonstration: chemical energy in battery, mechanical energy in moving objects -Discussion on heat energy from friction -Examples of electrical energy in appliances -Identification of wave energy: light, sound |
Battery and bulb
-Moving trolley -Rubbing blocks for friction -Electrical appliances -Tuning fork -Torch -Energy forms charts -Real objects showing energy forms |
KLB Secondary Physics Form 3, Pages 95-96
|
|
| 2 | 3 |
Work, Energy, Power and Machines
|
Forms of Energy
|
By the end of the
lesson, the learner
should be able to:
Define different forms of energy -Identify chemical, mechanical, heat, electrical, and wave energy -Give examples of each form of energy -Understand energy exists in various forms -Relate forms of energy to daily experiences |
In groups, learners are guided to:
Review energy sources through Q/A -Introduction to different forms of energy -Demonstration: chemical energy in battery, mechanical energy in moving objects -Discussion on heat energy from friction -Examples of electrical energy in appliances -Identification of wave energy: light, sound |
Battery and bulb
-Moving trolley -Rubbing blocks for friction -Electrical appliances -Tuning fork -Torch -Energy forms charts -Real objects showing energy forms |
KLB Secondary Physics Form 3, Pages 95-96
|
|
| 2 | 4-5 |
Work, Energy, Power and Machines
|
Energy Transformation and Conservation
Work and its Calculation |
By the end of the
lesson, the learner
should be able to:
Understand energy transformations between different forms -State the law of conservation of energy -Identify transducers and their functions -Apply conservation of energy to various situations -Draw energy transformation diagrams Define work in scientific terms -State the condition for work to be done -Calculate work using W = F × d -Understand work as a scalar quantity -Solve problems involving work calculations |
In groups, learners are guided to:
Q/A on forms of energy -Demonstration: energy transformations in hydroelectric power -Examples of transducers: battery, dynamo, solar cell -Statement and explanation of energy conservation law -Drawing energy flow diagrams -Discussion on energy losses and efficiency Review energy transformations through Q/A -Definition of work with emphasis on force and displacement -Demonstration: lifting objects, pushing trolleys -Worked examples on work calculations -Discussion on when no work is done -Problem-solving session on work calculations |
Dynamo
-Battery -Solar cell (if available) -Charts showing energy transformations -Transducer examples -Energy flow diagrams -Hydroelectric model setup Spring balance -Masses -Trolley -Measuring tape -Calculator -Force and displacement demonstrations -Worked examples charts -Problem worksheets |
KLB Secondary Physics Form 3, Pages 96-97
KLB Secondary Physics Form 3, Pages 96-99 |
|
| 3 | 1 |
Work, Energy, Power and Machines
|
Work with Variable Forces
|
By the end of the
lesson, the learner
should be able to:
Calculate work done by variable forces -Interpret force-distance graphs -Find work done using area under graphs -Understand positive and negative work -Apply graphical methods to work calculations |
In groups, learners are guided to:
Q/A review on work calculations -Introduction to variable forces -Plotting force-distance graphs -Demonstration: stretching spring with varying force -Calculation of areas under graphs -Worked examples with triangular and trapezoidal areas |
Graph paper
-Springs -Force meter -Ruler -Calculator -Force-distance graph examples -Different shaped area examples -Demonstration springs |
KLB Secondary Physics Form 3, Pages 99-100
|
|
| 3 | 2 |
Work, Energy, Power and Machines
|
Gravitational Potential Energy
|
By the end of the
lesson, the learner
should be able to:
Define gravitational potential energy -Derive P.E. = mgh -Calculate potential energy at different heights -Understand reference levels for potential energy -Solve problems involving potential energy |
In groups, learners are guided to:
Review variable force work through Q/A -Demonstration: lifting objects to different heights -Derivation of P.E. = mgh -Discussion on choice of reference level -Worked examples on potential energy calculations -Problem-solving session with gravitational P.E. |
Masses of different sizes
-Measuring tape -Spring balance -Calculator -Height measurement setup -Worked examples -Gravitational P.E. charts |
KLB Secondary Physics Form 3, Pages 100-102
|
|
| 3 | 3 |
Work, Energy, Power and Machines
|
Gravitational Potential Energy
|
By the end of the
lesson, the learner
should be able to:
Define gravitational potential energy -Derive P.E. = mgh -Calculate potential energy at different heights -Understand reference levels for potential energy -Solve problems involving potential energy |
In groups, learners are guided to:
Review variable force work through Q/A -Demonstration: lifting objects to different heights -Derivation of P.E. = mgh -Discussion on choice of reference level -Worked examples on potential energy calculations -Problem-solving session with gravitational P.E. |
Masses of different sizes
-Measuring tape -Spring balance -Calculator -Height measurement setup -Worked examples -Gravitational P.E. charts |
KLB Secondary Physics Form 3, Pages 100-102
|
|
| 3 | 4-5 |
Work, Energy, Power and Machines
|
Kinetic Energy
Conservation of Mechanical Energy |
By the end of the
lesson, the learner
should be able to:
Define kinetic energy -Derive K.E. = ½mv² -Calculate kinetic energy of moving objects -Understand relationship between work and kinetic energy -Apply work-energy theorem Apply conservation of energy to mechanical systems -Analyze energy changes in pendulums and projectiles -Solve problems using conservation of energy -Understand energy transformations in oscillating systems -Calculate energy at different positions |
In groups, learners are guided to:
Q/A on potential energy concepts -Demonstration: moving trolleys at different speeds -Derivation of K.E. = ½mv² using work-energy theorem -Worked examples on kinetic energy calculations -Discussion on work-energy theorem -Problem-solving session on kinetic energy Review kinetic energy through Q/A -Demonstration: simple pendulum energy changes -Analysis of energy at different positions in pendulum swing -Discussion on energy conservation in projectile motion -Worked examples using conservation of energy -Problem-solving on energy conservation |
Trolleys
-Stopwatch -Measuring tape -Spring balance -Calculator -Kinetic energy demonstration setup -Speed measurement apparatus Simple pendulum setup -Measuring tape -Stopwatch -Masses -Calculator -Pendulum energy charts -Conservation examples -String and bob |
KLB Secondary Physics Form 3, Pages 102-105
KLB Secondary Physics Form 3, Pages 104-106 |
|
| 4 | 1 |
Work, Energy, Power and Machines
|
Power and its Applications
|
By the end of the
lesson, the learner
should be able to:
Define power as rate of doing work -Calculate power using P = W/t and P = Fv -State SI unit of power (Watt) -Understand power ratings of appliances -Solve problems involving power calculations |
In groups, learners are guided to:
Q/A on energy conservation -Definition of power with examples -Derivation of P = W/t and P = Fv -Discussion on power ratings of electrical appliances -Worked examples on power calculations -Investigation: measuring power of students climbing stairs |
Stopwatch
-Measuring tape -Spring balance -Calculator -Electrical appliances for power ratings -Stairs for practical work -Power calculation charts |
KLB Secondary Physics Form 3, Pages 106-108
|
|
| 4 | 2 |
Work, Energy, Power and Machines
|
Power and its Applications
|
By the end of the
lesson, the learner
should be able to:
Define power as rate of doing work -Calculate power using P = W/t and P = Fv -State SI unit of power (Watt) -Understand power ratings of appliances -Solve problems involving power calculations |
In groups, learners are guided to:
Q/A on energy conservation -Definition of power with examples -Derivation of P = W/t and P = Fv -Discussion on power ratings of electrical appliances -Worked examples on power calculations -Investigation: measuring power of students climbing stairs |
Stopwatch
-Measuring tape -Spring balance -Calculator -Electrical appliances for power ratings -Stairs for practical work -Power calculation charts |
KLB Secondary Physics Form 3, Pages 106-108
|
|
| 4 | 3 |
Work, Energy, Power and Machines
|
Simple Machines - Introduction and Terminology
|
By the end of the
lesson, the learner
should be able to:
Define machines and their purposes -Understand load, effort, and fulcrum -Define mechanical advantage, velocity ratio, and efficiency -Calculate M.A., V.R., and efficiency -Understand relationship between these quantities |
In groups, learners are guided to:
Review power concepts through Q/A -Introduction to machines and their uses -Demonstration: simple lever showing load, effort, fulcrum -Definition and calculation of M.A., V.R., and efficiency -Worked examples on machine calculations -Discussion on why efficiency is always less than 100% |
Simple lever setup
-Masses for loads -Spring balance -Ruler -Calculator -Machine terminology charts -Efficiency calculation examples |
KLB Secondary Physics Form 3, Pages 108-112
|
|
| 4 | 4-5 |
Work, Energy, Power and Machines
|
Levers - Types and Applications
Pulleys - Fixed and Movable |
By the end of the
lesson, the learner
should be able to:
Classify levers into three types -Identify examples of each type of lever -Apply principle of moments to levers -Calculate forces in lever systems -Understand applications of different lever types Understand operation of fixed and movable pulleys -Calculate M.A. and V.R. for different pulley systems -Analyze block and tackle arrangements -Solve problems involving pulley systems -Understand advantages of pulley systems |
In groups, learners are guided to:
Q/A on machine terminology -Classification of levers: Class I, II, and III -Demonstration: examples of each lever type -Application of principle of moments -Worked examples on lever calculations -Identification of levers in daily life tools Review lever types through Q/A -Demonstration: fixed pulley operation -Demonstration: single movable pulley -Analysis of block and tackle systems -Calculation of M.A. and V.R. for different arrangements -Problem-solving on pulley systems |
Various lever examples
-Rulers -Masses -Spring balance -Fulcrum supports -Lever classification charts -Daily life lever examples -Calculator Pulley blocks -String -Masses -Spring balance -Pulley arrangements -Block and tackle setup -Calculator -Pulley system diagrams |
KLB Secondary Physics Form 3, Pages 112-114
KLB Secondary Physics Form 3, Pages 115-120 |
|
| 5 | 1 |
Work, Energy, Power and Machines
|
Inclined Planes and Screws
|
By the end of the
lesson, the learner
should be able to:
Understand inclined plane as a machine -Calculate M.A. and V.R. for inclined planes -Analyze screw as an inclined plane -Understand applications of inclined planes -Solve problems involving inclined planes |
In groups, learners are guided to:
Q/A on pulley systems -Demonstration: moving load up inclined plane -Measurement of effort and load for inclined plane -Calculation of M.A. and V.R. for inclined plane -Discussion on screw as modified inclined plane -Examples of inclined planes in daily life |
Inclined plane setup
-Trolley or wooden block -Spring balance -Measuring tape -Protractor -Calculator -Screw examples -Various inclined plane models |
KLB Secondary Physics Form 3, Pages 114-115
|
|
| 5 | 2 |
Work, Energy, Power and Machines
|
Inclined Planes and Screws
|
By the end of the
lesson, the learner
should be able to:
Understand inclined plane as a machine -Calculate M.A. and V.R. for inclined planes -Analyze screw as an inclined plane -Understand applications of inclined planes -Solve problems involving inclined planes |
In groups, learners are guided to:
Q/A on pulley systems -Demonstration: moving load up inclined plane -Measurement of effort and load for inclined plane -Calculation of M.A. and V.R. for inclined plane -Discussion on screw as modified inclined plane -Examples of inclined planes in daily life |
Inclined plane setup
-Trolley or wooden block -Spring balance -Measuring tape -Protractor -Calculator -Screw examples -Various inclined plane models |
KLB Secondary Physics Form 3, Pages 114-115
|
|
| 5 | 3 |
Work, Energy, Power and Machines
|
Gears and Hydraulic Systems
|
By the end of the
lesson, the learner
should be able to:
Understand gear systems and their operation -Calculate V.R. for gear systems -Explain hydraulic lift principle -Apply Pascal's principle to hydraulic systems -Calculate M.A. and V.R. for hydraulic systems |
In groups, learners are guided to:
Review inclined planes through Q/A -Demonstration: gear system operation -Calculation of gear ratios and V.R. -Explanation of hydraulic lift principle -Demonstration: Pascal's principle using syringes -Calculation of hydraulic system parameters |
Gear wheels
-Bicycle for gear demonstration -Syringes of different sizes -Water -Tubes -Calculator -Hydraulic system diagrams -Gear ratio charts |
KLB Secondary Physics Form 3, Pages 116-119
|
|
| 5 | 4-5 |
Work, Energy, Power and Machines
Current Electricity (II) |
Efficiency of Machines
Electric Current and Measurement |
By the end of the
lesson, the learner
should be able to:
Understand factors affecting machine efficiency -Calculate efficiency using different methods -Investigate efficiency of various machines -Understand energy losses in machines -Discuss methods to improve efficiency Define electric current and state its SI unit -Understand conventional current flow -Use ammeters correctly to measure current -Read ammeter scales accurately -Understand current as rate of flow of charge |
In groups, learners are guided to:
Q/A on gears and hydraulic systems -Investigation: efficiency of pulley system -Discussion on factors causing energy losses -Measurement of input and output work -Calculation of efficiency for different machines -Discussion on improving machine efficiency Q/A review on basic electricity from Form 2 -Definition of electric current and conventional flow -Demonstration: proper ammeter connection in series -Practice reading different ammeter scales -Discussion on digital vs analogue meters -Safety precautions when using electrical equipment |
Various machines for testing
-Spring balances -Measuring tape -Stopwatch -Calculator -Efficiency measurement setup -Lubricants for demonstration Ammeters (analogue and digital) -Dry cells -Connecting wires -Bulbs -Switches -Ammeter scale charts -Safety equipment |
KLB Secondary Physics Form 3, Pages 120-123
KLB Secondary Physics Form 3, Pages 126-130 |
|
| 6 | 1 |
Current Electricity (II)
|
Series and Parallel Circuits - Current Distribution
|
By the end of the
lesson, the learner
should be able to:
Investigate current in series circuits -Investigate current in parallel circuits -Apply Kirchhoff's current law -Understand current division in parallel circuits -Solve problems involving current distribution |
In groups, learners are guided to:
Review ammeter usage through Q/A -Experiment: measuring current in series circuit -Experiment: measuring current in parallel circuit -Analysis of current readings and patterns -Statement of Kirchhoff's current law -Problem-solving on current distribution |
Multiple ammeters
-Bulbs -Connecting wires -Dry cells -Switches -Circuit boards -Calculator -Current distribution worksheets |
KLB Secondary Physics Form 3, Pages 130-133
|
|
| 6 | 2 |
Current Electricity (II)
|
Series and Parallel Circuits - Current Distribution
|
By the end of the
lesson, the learner
should be able to:
Investigate current in series circuits -Investigate current in parallel circuits -Apply Kirchhoff's current law -Understand current division in parallel circuits -Solve problems involving current distribution |
In groups, learners are guided to:
Review ammeter usage through Q/A -Experiment: measuring current in series circuit -Experiment: measuring current in parallel circuit -Analysis of current readings and patterns -Statement of Kirchhoff's current law -Problem-solving on current distribution |
Multiple ammeters
-Bulbs -Connecting wires -Dry cells -Switches -Circuit boards -Calculator -Current distribution worksheets |
KLB Secondary Physics Form 3, Pages 130-133
|
|
| 6 | 3 |
Current Electricity (II)
|
Potential Difference and Voltage Measurement
|
By the end of the
lesson, the learner
should be able to:
Define potential difference in terms of work done -State the SI unit of potential difference -Use voltmeters correctly to measure voltage -Understand voltage measurement across components -Read voltmeter scales accurately |
In groups, learners are guided to:
Q/A on current distribution -Definition of potential difference and work done per unit charge -Demonstration: proper voltmeter connection in parallel -Practice measuring voltage across different components -Comparison of voltmeter and ammeter connections -Safety considerations in voltage measurement |
Voltmeters (analogue and digital)
-Dry cells -Resistors -Bulbs -Connecting wires -Switches -Voltmeter scale charts -Work and charge demonstration materials |
KLB Secondary Physics Form 3, Pages 126-129
|
|
| 6 | 4-5 |
Current Electricity (II)
|
Series and Parallel Circuits - Voltage Distribution
|
By the end of the
lesson, the learner
should be able to:
Investigate voltage in series circuits -Investigate voltage in parallel circuits -Apply Kirchhoff's voltage law -Understand voltage division in series circuits -Solve problems involving voltage distribution |
In groups, learners are guided to:
Review voltage measurement through Q/A -Experiment: measuring voltage across series components -Experiment: measuring voltage across parallel components -Analysis of voltage readings and patterns -Statement of Kirchhoff's voltage law -Problem-solving on voltage distribution |
Multiple voltmeters
-Various resistors -Connecting wires -Dry cells -Switches -Circuit boards -Calculator -Voltage distribution worksheets |
KLB Secondary Physics Form 3, Pages 130-133
|
|
| 7 | 1 |
Current Electricity (II)
|
Ohm's Law - Investigation and Verification
|
By the end of the
lesson, the learner
should be able to:
State Ohm's law -Investigate relationship between voltage and current -Plot V-I graphs for ohmic conductors -Verify Ohm's law experimentally -Understand conditions for Ohm's law validity |
In groups, learners are guided to:
Q/A on voltage distribution -Experiment: varying voltage and measuring current through resistor -Data collection and table completion -Plotting V-I graph and analyzing slope -Statement and verification of Ohm's law -Discussion on temperature and other conditions |
Rheostat
-Ammeter -Voltmeter -Resistor coils -Connecting wires -Dry cells -Graph paper -Calculator -Ruler |
KLB Secondary Physics Form 3, Pages 131-135
|
|
| 7 | 2 |
Current Electricity (II)
|
Electrical Resistance and Ohm's Law Applications
|
By the end of the
lesson, the learner
should be able to:
Define electrical resistance and its SI unit -Apply Ohm's law to calculate V, I, and R -Understand the relationship R = V/I -Solve problems using Ohm's law -Convert between different units of resistance |
In groups, learners are guided to:
Review Ohm's law investigation through Q/A -Definition of electrical resistance as V/I ratio -Worked examples applying Ohm's law triangle -Unit conversions: Ω, kΩ, MΩ -Problem-solving session on Ohm's law calculations -Discussion on factors affecting resistance |
Calculator
-Ohm's law triangle charts -Resistor color code charts -Various resistors -Multimeter -Problem worksheets -Unit conversion charts |
KLB Secondary Physics Form 3, Pages 131-135
|
|
| 7-8 |
Mid term |
|||||||
| 8 | 4-5 |
Current Electricity (II)
|
Ohmic and Non-Ohmic Conductors
|
By the end of the
lesson, the learner
should be able to:
Distinguish between ohmic and non-ohmic conductors -Investigate V-I characteristics of different materials -Understand why some materials don't obey Ohm's law -Analyze V-I graphs for various conductors -Identify practical applications of non-ohmic conductors |
In groups, learners are guided to:
Q/A on Ohm's law applications -Experiment: V-I characteristics of filament bulb -Experiment: V-I characteristics of diode -Comparison of different V-I graph shapes -Discussion on temperature effects on resistance -Applications of non-ohmic conductors |
Filament bulbs
-Diodes -Thermistors -LDR -Ammeter -Voltmeter -Rheostat -Graph paper -Various conductors for testing |
KLB Secondary Physics Form 3, Pages 134-135
|
|
| 9 | 1 |
Current Electricity (II)
|
Types of Resistors and Their Applications
|
By the end of the
lesson, the learner
should be able to:
Identify different types of resistors -Understand fixed and variable resistors -Read resistor color codes -Understand applications of special resistors -Use rheostats and potentiometers |
In groups, learners are guided to:
Review ohmic vs non-ohmic conductors through Q/A -Identification of resistor types: carbon, wire-wound, variable -Practice reading resistor color codes -Demonstration: rheostat and potentiometer operation -Discussion on thermistors and LDR applications -Practical applications in circuits |
Various resistor types
-Color code charts -Rheostat -Potentiometer -Thermistor -LDR -Multimeter -Circuit boards -Application examples |
KLB Secondary Physics Form 3, Pages 135-140
|
|
| 9 | 2 |
Current Electricity (II)
|
Measurement of Resistance - Voltmeter-Ammeter Method
|
By the end of the
lesson, the learner
should be able to:
Describe voltmeter-ammeter method -Set up circuits for resistance measurement -Calculate resistance from V and I readings -Understand limitations of the method -Analyze experimental errors |
In groups, learners are guided to:
Q/A on resistor types -Setup of voltmeter-ammeter circuit -Measurement of voltage and current for unknown resistor -Calculation of resistance using R = V/I -Discussion on measurement errors and accuracy -Comparison with multimeter readings |
Unknown resistors
-Voltmeter -Ammeter -Rheostat -Connecting wires -Dry cells -Switches -Calculator -Multimeter for comparison |
KLB Secondary Physics Form 3, Pages 140-142
|
|
| 9 | 3 |
Current Electricity (II)
|
Wheatstone Bridge Method
|
By the end of the
lesson, the learner
should be able to:
Understand the principle of Wheatstone bridge -Set up Wheatstone bridge circuit -Balance the bridge for resistance measurement -Calculate unknown resistance using bridge equation -Appreciate accuracy of Wheatstone bridge method |
In groups, learners are guided to:
Review voltmeter-ammeter method through Q/A -Introduction to Wheatstone bridge principle -Demonstration of bridge balance condition -Setup and operation of Wheatstone bridge -Calculation using R₁/R₂ = R₃/R₄ -Comparison of accuracy with other methods |
Wheatstone bridge apparatus
-Galvanometer -Known resistors -Unknown resistors -Connecting wires -Battery -Calculator -Bridge equation charts |
KLB Secondary Physics Form 3, Pages 142-144
|
|
| 9 | 4-5 |
Current Electricity (II)
|
Resistors in Series - Theory and Calculations
|
By the end of the
lesson, the learner
should be able to:
Derive formula for resistors in series -Calculate total resistance for series combination -Understand current and voltage in series circuits -Solve problems involving series resistors -Apply series resistance in circuit analysis |
In groups, learners are guided to:
Q/A on resistance measurement methods -Derivation of Rs = R₁ + R₂ + R₃... -Demonstration: measuring total resistance of series combination -Analysis of current (same) and voltage (divided) in series -Worked examples on series resistance calculations -Problem-solving session |
Resistors of known values
-Multimeter -Connecting wires -Circuit boards -Calculator -Series circuit diagrams -Problem worksheets |
KLB Secondary Physics Form 3, Pages 144-147
|
|
| 10 | 1 |
Current Electricity (II)
|
Resistors in Parallel - Theory and Calculations
|
By the end of the
lesson, the learner
should be able to:
Derive formula for resistors in parallel -Calculate total resistance for parallel combination -Understand current and voltage in parallel circuits -Solve problems involving parallel resistors -Apply parallel resistance in circuit analysis |
In groups, learners are guided to:
Review series resistance through Q/A -Derivation of 1/Rp = 1/R₁ + 1/R₂ + 1/R₃... -Demonstration: measuring total resistance of parallel combination -Analysis of voltage (same) and current (divided) in parallel -Worked examples on parallel resistance calculations -Problem-solving session |
Resistors of known values
-Multimeter -Connecting wires -Circuit boards -Calculator -Parallel circuit diagrams -Problem worksheets |
KLB Secondary Physics Form 3, Pages 147-150
|
|
| 10 | 2 |
Current Electricity (II)
|
Mixed Circuits - Series-Parallel Combinations
|
By the end of the
lesson, the learner
should be able to:
Analyze circuits with series-parallel combinations -Apply reduction techniques to complex circuits -Calculate total resistance of mixed circuits -Determine current and voltage in different branches -Solve complex circuit problems |
In groups, learners are guided to:
Q/A on parallel resistance -Introduction to mixed circuit analysis techniques -Step-by-step reduction of complex circuits -Worked examples on series-parallel combinations -Problem-solving on mixed circuits -Discussion on circuit analysis strategies |
Various resistors
-Circuit boards -Connecting wires -Multimeter -Calculator -Complex circuit diagrams -Step-by-step analysis charts |
KLB Secondary Physics Form 3, Pages 150-153
|
|
| 10 | 3 |
Current Electricity (II)
|
Electromotive Force (EMF) and Terminal Voltage
|
By the end of the
lesson, the learner
should be able to:
Define electromotive force (EMF) -Distinguish between EMF and terminal voltage -Understand the concept of lost voltage -Relate EMF to work done by the cell -Measure EMF using high resistance voltmeter |
In groups, learners are guided to:
Review mixed circuits through Q/A -Definition of EMF as work done per unit charge -Demonstration: measuring EMF with open circuit -Comparison of EMF and terminal voltage under load -Discussion on energy conversion in cells -Measurement techniques for EMF |
High resistance voltmeter
-Various cells -Switches -Resistors -Connecting wires -EMF measurement setup -Energy conversion charts |
KLB Secondary Physics Form 3, Pages 150-152
|
|
| 10 | 4-5 |
Current Electricity (II)
|
Electromotive Force (EMF) and Terminal Voltage
Internal Resistance of Cells |
By the end of the
lesson, the learner
should be able to:
Define electromotive force (EMF) -Distinguish between EMF and terminal voltage -Understand the concept of lost voltage -Relate EMF to work done by the cell -Measure EMF using high resistance voltmeter Define internal resistance -Understand the relationship E = V + Ir -Calculate internal resistance experimentally -Understand factors affecting internal resistance -Apply internal resistance in circuit calculations |
In groups, learners are guided to:
Review mixed circuits through Q/A -Definition of EMF as work done per unit charge -Demonstration: measuring EMF with open circuit -Comparison of EMF and terminal voltage under load -Discussion on energy conversion in cells -Measurement techniques for EMF Q/A on EMF concepts -Introduction to internal resistance concept -Derivation of E = V + Ir relationship -Experiment: measuring internal resistance using different loads -Plotting E vs R graph to find internal resistance -Discussion on factors affecting internal resistance |
High resistance voltmeter
-Various cells -Switches -Resistors -Connecting wires -EMF measurement setup -Energy conversion charts Various cells -Resistors of different values -Voltmeter -Ammeter -Connecting wires -Graph paper -Calculator -Internal resistance apparatus |
KLB Secondary Physics Form 3, Pages 150-152
KLB Secondary Physics Form 3, Pages 150-153 |
|
| 11 | 1 |
Current Electricity (II)
|
Cells in Series and Parallel
|
By the end of the
lesson, the learner
should be able to:
Analyze cells connected in series -Analyze cells connected in parallel -Calculate total EMF and internal resistance -Understand advantages of different connections -Solve problems involving cell combinations |
In groups, learners are guided to:
Review internal resistance through Q/A -Analysis of identical cells in series connection -Analysis of identical cells in parallel connection -Calculation of equivalent EMF and internal resistance -Discussion on practical applications and advantages -Problem-solving on cell combinations |
Multiple identical cells
-Connecting wires -Voltmeter -Ammeter -Resistors -Calculator -Cell combination diagrams -Problem worksheets |
KLB Secondary Physics Form 3, Pages 152-153
|
|
| 11 | 2 |
Current Electricity (II)
|
Advanced Circuit Analysis and Problem Solving
|
By the end of the
lesson, the learner
should be able to:
Apply Kirchhoff's laws to complex circuits -Solve circuits with multiple sources -Analyze circuits with internal resistance -Use systematic approaches to circuit problems -Integrate all electricity concepts |
In groups, learners are guided to:
Q/A on cell combinations -Application of Kirchhoff's current and voltage laws -Systematic approach to complex circuit analysis -Worked examples with multiple EMF sources -Problem-solving session covering all electricity topics -Discussion on practical circuit applications |
Complex circuit examples
-Calculator -Circuit analysis worksheets -Multiple EMF sources -Various resistors -Comprehensive problem sets -Kirchhoff's law charts |
KLB Secondary Physics Form 3, Pages 126-153
|
|
| 11 | 3 |
Heating Effect of Electric Current
|
Introduction to heating effect
|
By the end of the
lesson, the learner
should be able to:
Define heating effect of electric current - Explain mechanism of heat production in conductors - Investigate effect of current on resistance wire - Observe temperature changes in conductors |
In groups, learners are guided to:
Q/A on electric current from previous units - Experiment investigating effect of current on coil temperature - Observation of heating in different parts of circuit - Discussion on electron collision mechanism |
Battery, Resistance wire coils, Ammeter, Variable resistor, Thermometer, Stopwatch, Connecting wires
|
KLB Secondary Physics Form 3, Pages 195-197
|
|
| 11 | 4-5 |
Heating Effect of Electric Current
|
Factors affecting heat produced - current and time
Factors affecting heat produced - resistance Joule's law and electrical energy |
By the end of the
lesson, the learner
should be able to:
Investigate relationship between heat produced and current - Investigate relationship between heat produced and time - Plot graphs of temperature vs current² and time - State H ∝ I²t relationship State Joule's law of heating - Derive H = I²Rt = VIt = V²t/R - Calculate electrical energy and power - Solve numerical problems on heating calculations |
In groups, learners are guided to:
Experiment varying current and measuring temperature change - Investigation of heating time relationship - Data collection and graph plotting - Mathematical analysis of relationships Discussion on Joule's heating law - Mathematical derivations of heating formulas - Problem solving on energy calculations - Practical applications of heating law |
Resistance coils, Variable resistor, Ammeter, Thermometer, Stopwatch, Graph paper, Different current values
Coils of different resistance, Ammeter, Thermometer, Measuring instruments, Stopwatch, Calculation worksheets Formula charts, Calculators, Problem worksheets, Electrical devices for analysis |
KLB Secondary Physics Form 3, Pages 197-199
KLB Secondary Physics Form 3, Pages 200-201 |
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| 12 | 1 |
Heating Effect of Electric Current
|
Electrical power and energy calculations
Applications - electrical lighting and heating devices |
By the end of the
lesson, the learner
should be able to:
Define electrical power P = VI = I²R = V²/R - Calculate electrical energy W = Pt - Convert between different units (J, kWh) - Solve complex power problems |
In groups, learners are guided to:
Derivation of electrical power formulas - Energy unit conversions - Problem solving on household appliances - Cost calculations for electrical consumption |
Calculators, Unit conversion charts, Household appliance ratings, Electricity bills, Problem sets
Filament lamps, Electric iron, Electric kettle, Heating elements, Energy saving bulbs, Appliance diagrams |
KLB Secondary Physics Form 3, Pages 201-202
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|
| 12 | 2 |
Electrostatics II
|
Electric field patterns and charge distribution
|
By the end of the
lesson, the learner
should be able to:
Define electric field and electric field lines - Demonstrate field patterns using chalk dust method - Describe charge distribution on spherical and pear-shaped conductors - Use proof-plane and electroscope to test charge distribution |
In groups, learners are guided to:
Q/A on electrostatics basics from Form 2 - Experiment using chalk dust in castor oil to show field patterns - Investigation of charge distribution using proof-plane - Observation of electroscope deflections at different conductor points |
High voltage source, Wire electrodes, Petri-dish, Castor oil, Chalk dust, Spherical and pear-shaped conductors, Proof-plane, Gold-leaf electroscope
|
KLB Secondary Physics Form 3, Pages 177-181
|
|
| 12 | 3 |
Electrostatics II
|
Lightning arrestor and capacitance introduction
Factors affecting capacitance and types of capacitors |
By the end of the
lesson, the learner
should be able to:
Explain working principle of lightning arrestor - Describe charge concentration at sharp points - Define capacitance and state SI units - Describe parallel-plate capacitor structure |
In groups, learners are guided to:
Demonstration of charge concentration at points using wind-mill experiment - Discussion on lightning protection applications - Introduction to capacitance concept - Demonstration of capacitor charging process |
Wind-mill model, Point charges, Lightning arrestor photos, Parallel-plate capacitors, Battery, Voltmeter, Milliammeter
Aluminium plates, Various dielectric materials, Electroscope, Paper capacitors, Electrolytic capacitors, Variable air capacitors, Measuring instruments |
KLB Secondary Physics Form 3, Pages 181-185
|
|
| 12 | 4-5 |
Electrostatics II
|
Capacitors in series and parallel
Energy stored in capacitors Complex capacitor problems |
By the end of the
lesson, the learner
should be able to:
Derive effective capacitance for series combination - Derive effective capacitance for parallel combination - Explain charge and voltage relationships - Calculate individual charges and voltages Derive formula for energy stored E = ½CV² - Explain energy storage mechanism - Calculate energy in charged capacitors - Investigate energy conservation in capacitor combinations |
In groups, learners are guided to:
Mathematical derivation of series formula (1/C = 1/C₁ + 1/C₂) - Mathematical derivation of parallel formula (C = C₁ + C₂) - Problem solving with capacitor combinations - Practical verification using circuits Mathematical derivation of energy storage formula - Discussion on energy storage principles - Problem solving on energy calculations - Analysis of energy conservation in series and parallel combinations |
Capacitors of different values, Voltmeters, Ammeters, Battery, Connecting wires, Calculators, Circuit boards
Charged capacitors, Energy calculation worksheets, Graphing materials, Calculators, Safety equipment Complex circuit diagrams, Advanced problem worksheets, Graphing materials, Calculators, Past examination papers |
KLB Secondary Physics Form 3, Pages 188-191
KLB Secondary Physics Form 3, Pages 191-192 |
|
| 13 | 1 |
Electrostatics II
|
Applications of capacitors
|
By the end of the
lesson, the learner
should be able to:
Explain use in rectification and smoothing circuits - Describe applications in tuning circuits - State use in delay circuits and camera flash - Solve comprehensive numerical problems on all topics |
In groups, learners are guided to:
Discussion on practical applications in electronics - Demonstration of smoothing circuits - Explanation of tuning and delay functions - Comprehensive revision and problem solving covering all electrostatics topics |
Circuit diagrams, Smoothing circuit demo, Radio tuning circuits, Camera flash unit, Revision charts, Past examination papers
|
KLB Secondary Physics Form 3, Pages 192-193
|
|
| 13 | 2 |
Waves II
|
Properties of waves
Reflection of waves |
By the end of the
lesson, the learner
should be able to:
Define wavelength, frequency, amplitude and wavefront - Explain rectilinear propagation of waves - Describe wave production in ripple tank - Calculate wave speed using v=fλ |
In groups, learners are guided to:
Q/A on wave basics from Form 2 - Demonstration of wave production using ripple tank - Observation of rectilinear propagation - Calculations on wave speed |
Ripple tank, Straight vibrator, Water, Rulers, Stroboscope, Charts on wave properties
Ripple tank, Plane wave generator, Curved and straight reflectors, Graph paper, Pencils |
KLB Secondary Physics Form 3, Pages 156-158
|
|
| 13 | 3 |
Waves II
|
Refraction of waves
Diffraction of waves |
By the end of the
lesson, the learner
should be able to:
Describe refraction when waves change medium - Explain change in wavelength and speed - Demonstrate refraction using shallow and deep regions - State that frequency remains constant |
In groups, learners are guided to:
Q/A on refraction basics - Experiment using glass plate to create shallow region - Observation of wavefront spacing changes - Discussion on speed and wavelength changes |
Ripple tank, Glass plates, Water, Rulers for measurement, Frequency generator
Ripple tank, Barriers with gaps, Various gap sizes, Measuring instruments, Wave generator |
KLB Secondary Physics Form 3, Pages 161-163
|
|
| 13 | 4-5 |
Waves II
|
Interference patterns
Constructive and destructive interference Stationary waves formation |
By the end of the
lesson, the learner
should be able to:
Define interference and superposition principle - Explain constructive and destructive interference - Describe formation of interference patterns - Calculate path differences Distinguish between constructive and destructive interference - Explain conditions for each type - Demonstrate using sound waves - Calculate amplitudes in interference |
In groups, learners are guided to:
Demonstration using two coherent sources - Construction of interference patterns on paper - Observation of nodal and antinodal lines - Discussion on coherent sources Experiment with two loudspeakers - Observation of loud and quiet regions - Mathematical analysis of amplitude addition - Problem solving on wave interference |
Two-point sources, Graph paper, Compass, Rulers, Ripple tank setup, Audio frequency generator
Two loudspeakers, Audio generator, Microphone, Sound level meter, Connecting wires Tuning fork, String, Pulley, Weights, Stroboscope, Measuring tape, Retort stands |
KLB Secondary Physics Form 3, Pages 165-167
KLB Secondary Physics Form 3, Pages 167-169 |
|
| 14 | 1 |
Waves II
|
Modes of vibration in strings
|
By the end of the
lesson, the learner
should be able to:
Derive expressions for fundamental frequency - Explain harmonics and overtones - Calculate frequencies of overtones - Demonstrate different modes |
In groups, learners are guided to:
Discussion on fundamental and overtone frequencies - Mathematical derivation of frequency formulas - Practical demonstration of string vibrations - Problem solving |
Sonometer, Tuning forks, Weights, Measuring instruments, Calculator, Formula charts
|
KLB Secondary Physics Form 3, Pages 170-172
|
|
| 14 | 2 |
Waves II
|
Vibrating air columns - closed pipes
|
By the end of the
lesson, the learner
should be able to:
Explain stationary waves in closed pipes - Derive fundamental frequency formula - Calculate overtone frequencies - Demonstrate resonance in pipes |
In groups, learners are guided to:
Experiment with closed pipe resonance - Observation of resonance positions - Calculation of frequency relationships - End correction discussions |
Closed pipes of various lengths, Tuning forks, Water, Measuring cylinders, Resonance tubes
|
KLB Secondary Physics Form 3, Pages 172-174
|
|
| 14 | 3 |
Waves II
|
Vibrating air columns - open pipes
|
By the end of the
lesson, the learner
should be able to:
Compare open and closed pipe resonance - Derive frequency formulas for open pipes - Explain harmonic series differences - Solve numerical problems |
In groups, learners are guided to:
Experiment with open pipe resonance - Comparison with closed pipe results - Mathematical problem solving - Summary of all wave phenomena |
Open pipes, Tuning forks, Sound level meters, Calculators, Summary charts, Past papers
|
KLB Secondary Physics Form 3, Pages 174-176
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