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| WK | LSN | TOPIC | SUB-TOPIC | OBJECTIVES | T/L ACTIVITIES | T/L AIDS | REFERENCE | REMARKS |
|---|---|---|---|---|---|---|---|---|
| 2 | 1 |
Waves II
|
Properties 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
|
KLB Secondary Physics Form 3, Pages 156-158
|
|
| 2 | 2 |
Waves II
|
Properties 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
|
KLB Secondary Physics Form 3, Pages 156-158
|
|
| 2 | 3 |
Waves II
|
Reflection of waves
|
By the end of the
lesson, the learner
should be able to:
State laws of reflection for waves - Describe experiments showing reflection - Sketch reflected wave patterns - Explain behavior at different reflectors |
In groups, learners are guided to:
Review of reflection principles - Experiment showing plane waves on straight reflector - Observation of circular waves on concave and convex reflectors - Drawing wavefront diagrams |
Ripple tank, Plane wave generator, Curved and straight reflectors, Graph paper, Pencils
|
KLB Secondary Physics Form 3, Pages 158-161
|
|
| 2 | 4 |
Waves II
|
Reflection of waves
|
By the end of the
lesson, the learner
should be able to:
State laws of reflection for waves - Describe experiments showing reflection - Sketch reflected wave patterns - Explain behavior at different reflectors |
In groups, learners are guided to:
Review of reflection principles - Experiment showing plane waves on straight reflector - Observation of circular waves on concave and convex reflectors - Drawing wavefront diagrams |
Ripple tank, Plane wave generator, Curved and straight reflectors, Graph paper, Pencils
|
KLB Secondary Physics Form 3, Pages 158-161
|
|
| 2 | 5 |
Waves II
|
Refraction 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
|
KLB Secondary Physics Form 3, Pages 161-163
|
|
| 3 | 1 |
Waves II
|
Diffraction of waves
|
By the end of the
lesson, the learner
should be able to:
Define diffraction - Explain factors affecting extent of diffraction - Describe experiments showing diffraction - Compare diffraction through different gap sizes |
In groups, learners are guided to:
Demonstration of diffraction using various gap sizes - Observation of spreading effect - Investigation of relationship between gap size and wavelength - Practical measurements |
Ripple tank, Barriers with gaps, Various gap sizes, Measuring instruments, Wave generator
|
KLB Secondary Physics Form 3, Pages 163-165
|
|
| 3 | 2 |
Waves II
|
Diffraction of waves
|
By the end of the
lesson, the learner
should be able to:
Define diffraction - Explain factors affecting extent of diffraction - Describe experiments showing diffraction - Compare diffraction through different gap sizes |
In groups, learners are guided to:
Demonstration of diffraction using various gap sizes - Observation of spreading effect - Investigation of relationship between gap size and wavelength - Practical measurements |
Ripple tank, Barriers with gaps, Various gap sizes, Measuring instruments, Wave generator
|
KLB Secondary Physics Form 3, Pages 163-165
|
|
| 3 | 3 |
Waves II
|
Diffraction of waves
|
By the end of the
lesson, the learner
should be able to:
Define diffraction - Explain factors affecting extent of diffraction - Describe experiments showing diffraction - Compare diffraction through different gap sizes |
In groups, learners are guided to:
Demonstration of diffraction using various gap sizes - Observation of spreading effect - Investigation of relationship between gap size and wavelength - Practical measurements |
Ripple tank, Barriers with gaps, Various gap sizes, Measuring instruments, Wave generator
|
KLB Secondary Physics Form 3, Pages 163-165
|
|
| 3 | 4 |
Waves II
|
Interference patterns
|
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 |
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 |
Two-point sources, Graph paper, Compass, Rulers, Ripple tank setup, Audio frequency generator
|
KLB Secondary Physics Form 3, Pages 165-167
|
|
| 3 | 5 |
Waves II
|
Interference patterns
|
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 |
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 |
Two-point sources, Graph paper, Compass, Rulers, Ripple tank setup, Audio frequency generator
|
KLB Secondary Physics Form 3, Pages 165-167
|
|
| 4 | 1 |
Waves II
|
Constructive and destructive interference
|
By the end of the
lesson, the learner
should be able to:
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:
Experiment with two loudspeakers - Observation of loud and quiet regions - Mathematical analysis of amplitude addition - Problem solving on wave interference |
Two loudspeakers, Audio generator, Microphone, Sound level meter, Connecting wires
|
KLB Secondary Physics Form 3, Pages 167-169
|
|
| 4 | 2 |
Waves II
|
Constructive and destructive interference
|
By the end of the
lesson, the learner
should be able to:
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:
Experiment with two loudspeakers - Observation of loud and quiet regions - Mathematical analysis of amplitude addition - Problem solving on wave interference |
Two loudspeakers, Audio generator, Microphone, Sound level meter, Connecting wires
|
KLB Secondary Physics Form 3, Pages 167-169
|
|
| 4 | 3 |
Waves II
|
Constructive and destructive interference
|
By the end of the
lesson, the learner
should be able to:
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:
Experiment with two loudspeakers - Observation of loud and quiet regions - Mathematical analysis of amplitude addition - Problem solving on wave interference |
Two loudspeakers, Audio generator, Microphone, Sound level meter, Connecting wires
|
KLB Secondary Physics Form 3, Pages 167-169
|
|
| 4 | 4 |
Waves II
|
Stationary waves formation
|
By the end of the
lesson, the learner
should be able to:
Define stationary waves - Explain formation from two opposing waves - Identify nodes and antinodes - Calculate distances between nodes |
In groups, learners are guided to:
Demonstration using vibrating string - Setup with tuning fork and pulley - Observation of stationary wave patterns - Measurements of wavelength |
Tuning fork, String, Pulley, Weights, Stroboscope, Measuring tape, Retort stands
|
KLB Secondary Physics Form 3, Pages 167-170
|
|
| 4 | 5 |
Waves II
|
Stationary waves formation
|
By the end of the
lesson, the learner
should be able to:
Define stationary waves - Explain formation from two opposing waves - Identify nodes and antinodes - Calculate distances between nodes |
In groups, learners are guided to:
Demonstration using vibrating string - Setup with tuning fork and pulley - Observation of stationary wave patterns - Measurements of wavelength |
Tuning fork, String, Pulley, Weights, Stroboscope, Measuring tape, Retort stands
|
KLB Secondary Physics Form 3, Pages 167-170
|
|
| 5 | 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
|
|
| 5 | 2 |
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
|
|
| 5 | 3 |
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
|
|
| 5 | 4 |
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
|
|
| 5 | 5 |
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
|
|
| 6 | 1 |
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
|
|
| 6 | 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
|
|
| 6 | 3 |
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
|
|
| 6 | 4 |
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
|
|
| 6 | 5 |
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
|
|
| 7 | 1 |
Electrostatics II
|
Lightning arrestor and capacitance introduction
|
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
|
KLB Secondary Physics Form 3, Pages 181-185
|
|
| 7 | 2 |
Electrostatics II
|
Lightning arrestor and capacitance introduction
|
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
|
KLB Secondary Physics Form 3, Pages 181-185
|
|
| 7 | 3 |
Electrostatics II
|
Factors affecting capacitance and types of capacitors
|
By the end of the
lesson, the learner
should be able to:
Investigate effect of plate separation, area and dielectric on capacitance - Derive capacitance formula C = εA/d - Describe paper, electrolytic and variable capacitors - Explain construction principles |
In groups, learners are guided to:
Experiment varying plate separation and area - Investigation using different dielectric materials - Mathematical derivation of capacitance formula - Examination of different capacitor types and their construction |
Aluminium plates, Various dielectric materials, Electroscope, Paper capacitors, Electrolytic capacitors, Variable air capacitors, Measuring instruments
|
KLB Secondary Physics Form 3, Pages 185-188
|
|
| 7 | 4 |
Electrostatics II
|
Factors affecting capacitance and types of capacitors
|
By the end of the
lesson, the learner
should be able to:
Investigate effect of plate separation, area and dielectric on capacitance - Derive capacitance formula C = εA/d - Describe paper, electrolytic and variable capacitors - Explain construction principles |
In groups, learners are guided to:
Experiment varying plate separation and area - Investigation using different dielectric materials - Mathematical derivation of capacitance formula - Examination of different capacitor types and their construction |
Aluminium plates, Various dielectric materials, Electroscope, Paper capacitors, Electrolytic capacitors, Variable air capacitors, Measuring instruments
|
KLB Secondary Physics Form 3, Pages 185-188
|
|
| 7 | 5 |
Electrostatics II
|
Capacitors in series and parallel
|
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 |
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 |
Capacitors of different values, Voltmeters, Ammeters, Battery, Connecting wires, Calculators, Circuit boards
|
KLB Secondary Physics Form 3, Pages 188-191
|
|
| 8 | 1 |
Electrostatics II
|
Energy stored in capacitors
|
By the end of the
lesson, the learner
should be able to:
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 energy storage formula - Discussion on energy storage principles - Problem solving on energy calculations - Analysis of energy conservation in series and parallel combinations |
Charged capacitors, Energy calculation worksheets, Graphing materials, Calculators, Safety equipment
|
KLB Secondary Physics Form 3, Pages 191-192
|
|
| 8 | 2 |
Electrostatics II
|
Energy stored in capacitors
|
By the end of the
lesson, the learner
should be able to:
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 energy storage formula - Discussion on energy storage principles - Problem solving on energy calculations - Analysis of energy conservation in series and parallel combinations |
Charged capacitors, Energy calculation worksheets, Graphing materials, Calculators, Safety equipment
|
KLB Secondary Physics Form 3, Pages 191-192
|
|
| 8 | 3 |
Electrostatics II
|
Energy stored in capacitors
|
By the end of the
lesson, the learner
should be able to:
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 energy storage formula - Discussion on energy storage principles - Problem solving on energy calculations - Analysis of energy conservation in series and parallel combinations |
Charged capacitors, Energy calculation worksheets, Graphing materials, Calculators, Safety equipment
|
KLB Secondary Physics Form 3, Pages 191-192
|
|
| 8 | 4 |
Electrostatics II
|
Complex capacitor problems
|
By the end of the
lesson, the learner
should be able to:
Solve problems involving mixed series and parallel combinations - Calculate charges, voltages and energies in complex circuits - Apply energy conservation principles - Analyze capacitor charging and discharging |
In groups, learners are guided to:
Problem solving with complex capacitor networks - Analysis of charging and discharging processes - Energy transfer calculations - Graph interpretation of charging curves |
Complex circuit diagrams, Advanced problem worksheets, Graphing materials, Calculators, Past examination papers
|
KLB Secondary Physics Form 3, Pages 188-193
|
|
| 8 | 4-5 |
Electrostatics II
|
Complex capacitor problems
|
By the end of the
lesson, the learner
should be able to:
Solve problems involving mixed series and parallel combinations - Calculate charges, voltages and energies in complex circuits - Apply energy conservation principles - Analyze capacitor charging and discharging |
In groups, learners are guided to:
Problem solving with complex capacitor networks - Analysis of charging and discharging processes - Energy transfer calculations - Graph interpretation of charging curves |
Complex circuit diagrams, Advanced problem worksheets, Graphing materials, Calculators, Past examination papers
|
KLB Secondary Physics Form 3, Pages 188-193
|
|
| 9 |
Halfterm |
|||||||
| 10 | 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
|
|
| 10 | 2 |
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
|
|
| 10 | 3 |
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
|
|
| 10 | 4 |
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
|
|
| 10 | 5 |
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 | 1 |
Heating Effect of Electric Current
|
Factors affecting heat produced - current and time
|
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 |
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 |
Resistance coils, Variable resistor, Ammeter, Thermometer, Stopwatch, Graph paper, Different current values
|
KLB Secondary Physics Form 3, Pages 197-199
|
|
| 11 | 2 |
Heating Effect of Electric Current
|
Factors affecting heat produced - current and time
|
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 |
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 |
Resistance coils, Variable resistor, Ammeter, Thermometer, Stopwatch, Graph paper, Different current values
|
KLB Secondary Physics Form 3, Pages 197-199
|
|
| 11 | 3 |
Heating Effect of Electric Current
|
Factors affecting heat produced - resistance
|
By the end of the
lesson, the learner
should be able to:
Investigate relationship between heat produced and resistance - Compare heating in different resistance wires - State H ∝ R relationship - Derive complete heating formula H = I²Rt |
In groups, learners are guided to:
Experiment using coils of different resistance - Temperature measurements with constant current - Comparison of heating rates - Mathematical derivation of heating law |
Coils of different resistance, Ammeter, Thermometer, Measuring instruments, Stopwatch, Calculation worksheets
|
KLB Secondary Physics Form 3, Pages 199-200
|
|
| 11 | 4 |
Heating Effect of Electric Current
|
Factors affecting heat produced - resistance
|
By the end of the
lesson, the learner
should be able to:
Investigate relationship between heat produced and resistance - Compare heating in different resistance wires - State H ∝ R relationship - Derive complete heating formula H = I²Rt |
In groups, learners are guided to:
Experiment using coils of different resistance - Temperature measurements with constant current - Comparison of heating rates - Mathematical derivation of heating law |
Coils of different resistance, Ammeter, Thermometer, Measuring instruments, Stopwatch, Calculation worksheets
|
KLB Secondary Physics Form 3, Pages 199-200
|
|
| 11 | 5 |
Heating Effect of Electric Current
|
Joule's law and electrical energy
|
By the end of the
lesson, the learner
should be able to:
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:
Discussion on Joule's heating law - Mathematical derivations of heating formulas - Problem solving on energy calculations - Practical applications of heating law |
Formula charts, Calculators, Problem worksheets, Electrical devices for analysis
|
KLB Secondary Physics Form 3, Pages 200-201
|
|
| 12 | 1 |
Heating Effect of Electric Current
|
Electrical power and energy calculations
|
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
|
KLB Secondary Physics Form 3, Pages 201-202
|
|
| 12 | 2 |
Heating Effect of Electric Current
|
Electrical power and energy calculations
|
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
|
KLB Secondary Physics Form 3, Pages 201-202
|
|
| 12 | 3 |
Heating Effect of Electric Current
|
Electrical power and energy calculations
|
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
|
KLB Secondary Physics Form 3, Pages 201-202
|
|
| 12 | 4 |
Heating Effect of Electric Current
|
Applications - electrical lighting and heating devices
|
By the end of the
lesson, the learner
should be able to:
Describe working of filament lamp - Explain choice of tungsten for filaments - Describe working of electric iron, kettle and heaters - Compare energy saving bulbs |
In groups, learners are guided to:
Discussion on filament lamp construction - Analysis of heating device designs - Examination of actual heating appliances - Efficiency comparisons |
Filament lamps, Electric iron, Electric kettle, Heating elements, Energy saving bulbs, Appliance diagrams
|
KLB Secondary Physics Form 3, Pages 202-203
|
|
| 12 | 5 |
Heating Effect of Electric Current
|
Applications - electrical lighting and heating devices
|
By the end of the
lesson, the learner
should be able to:
Describe working of filament lamp - Explain choice of tungsten for filaments - Describe working of electric iron, kettle and heaters - Compare energy saving bulbs |
In groups, learners are guided to:
Discussion on filament lamp construction - Analysis of heating device designs - Examination of actual heating appliances - Efficiency comparisons |
Filament lamps, Electric iron, Electric kettle, Heating elements, Energy saving bulbs, Appliance diagrams
|
KLB Secondary Physics Form 3, Pages 202-203
|
|
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