Mechanics and Thermal Physics

Energy, Work, Power and Machines - Energy transformations

By the end of the lesson, the learner should be able to:

- Describe energy transformations in various systems
- Apply conservation of energy to solve problems
- Connect energy transformations to motor vehicles, power stations and home appliances

In groups, learners are guided to:
- Discuss energy changes in falling objects, vehicles, and appliances
- Visit a garage to observe energy transformations in vehicles
- Solve problems using conservation of energy

How is energy transformed in a moving vehicle?

- Spotlight Physics Learner's Book pg. 121
- Digital resources
- Pictures of machines
- Reference books

- Written tests - Oral questions - Project work

Mechanics and Thermal Physics

Energy, Work, Power and Machines - Types of simple machines

By the end of the lesson, the learner should be able to:

- Identify types of simple machines
- Describe applications of levers, pulleys and inclined planes
- Connect simple machines to everyday tools like scissors, wheelbarrows and ramps

In groups, learners are guided to:
- Use digital resources to search for types of simple machines
- Identify simple machines in the environment
- Classify levers into first, second and third class

How do simple machines make work easier?

- Spotlight Physics Learner's Book pg. 124
- Pictures of simple machines
- Examples of levers
- Inclined plane model

- Oral questions - Written assignments - Observation

Mechanics and Thermal Physics

Energy, Work, Power and Machines - MA, VR and efficiency
Energy, Work, Power and Machines - Levers
Energy, Work, Power and Machines - Pulleys

By the end of the lesson, the learner should be able to:

- Define mechanical advantage, velocity ratio and efficiency
- Calculate MA, VR and efficiency of machines
- Explain why efficiency is always less than 100% due to friction in real machines

- Calculate VR of pulley systems
- Investigate efficiency of pulley systems
- Connect pulley systems to cranes, flagpoles and construction hoists

In groups, learners are guided to:
- Discuss meaning of MA, VR and efficiency
- Calculate MA and VR from experimental data
- Relate efficiency to energy losses
- Set up single fixed and movable pulleys
- Set up block and tackle system
- Calculate MA, VR and efficiency experimentally

Why is the efficiency of machines always less than 100%?
How does the number of pulleys affect the velocity ratio?

- Spotlight Physics Learner's Book pg. 129
- Simple machines
- Spring balance
- Known masses
- Metre rule
- Spotlight Physics Learner's Book pg. 131
- Lever apparatus
- Spotlight Physics Learner's Book pg. 131
- Pulleys
- String
- Known masses
- Spring balance
- Stand

- Written tests - Problem-solving - Practical assessment
- Practical assessment - Written tests - Observation

Mechanics and Thermal Physics

Energy, Work, Power and Machines - Inclined plane and screw
Energy, Work, Power and Machines - Wheel and axle, gears

By the end of the lesson, the learner should be able to:

- Calculate VR of inclined plane as length/height
- Calculate VR of screw using pitch and circumference
- Connect inclined planes to loading ramps and wheelchair access, and screws to car jacks

In groups, learners are guided to:
- Roll objects up inclined plane at different angles
- Calculate VR of inclined plane
- Discuss relationship between screw and inclined plane

How does the angle of inclination affect the effort required?

- Spotlight Physics Learner's Book pg. 134
- Inclined plane
- Screw jack
- Spring balance
- Metre rule
- Spotlight Physics Learner's Book pg. 137
- Wheel and axle model
- Gear wheels
- Bicycle

- Practical assessment - Written tests - Problem-solving

Mechanics and Thermal Physics
Waves and Optics
Waves and Optics

Energy, Work, Power and Machines - Hydraulic machines and applications
Properties of Waves - Rectilinear propagation of waves
Properties of Waves - Reflection of waves

By the end of the lesson, the learner should be able to:

- Explain working principle of hydraulic machines
- Calculate force multiplication in hydraulic systems
- Connect hydraulic machines to car brakes, car jacks and construction equipment

In groups, learners are guided to:
- Construct simple hydraulic system using syringes
- Calculate force and VR of hydraulic press
- Discuss applications in vehicles and construction
- Identify simple machines in treadmills, elevators and escalators

How do hydraulic machines multiply force?

- Spotlight Physics Learner's Book pg. 139
- Syringes of different sizes
- Tubing
- Water
- Pictures of hydraulic machines
- Spotlight Physics Grade 10 pg. 147
- Torch
- Digital resources
- Spotlight Physics Grade 10 pg. 148
- Digital resources
- Charts showing reflection

- Practical assessment - Written tests - Project presentations

Waves and Optics

Properties of Waves - Refraction of waves
Properties of Waves - Diffraction of waves
Properties of Waves - Interference of waves

By the end of the lesson, the learner should be able to:

- Explain the meaning of refraction of waves
- Demonstrate refraction using a straight object in water
- Relate refraction to why sound travels differently during day and night

In groups, learners are guided to:

- Observe how a straight object appears bent when placed in water
- Discuss how sound waves bend at the interface of cold and hot air
- Illustrate refraction of sound waves during day and night

Why does a stick appear bent in water?

- Spotlight Physics Grade 10 pg. 150
- Glass of water
- Straight object
- Digital resources
- Spotlight Physics Grade 10 pg. 151
- Torch
- Manila paper
- Spotlight Physics Grade 10 pg. 152
- Two identical speakers
- Audio frequency generator

- Observation - Oral questions - Written tests

Waves and Optics

Properties of Waves - Demonstrating rectilinear propagation using ripple tank
Properties of Waves - Demonstrating reflection using ripple tank
Properties of Waves - Demonstrating refraction using ripple tank
Properties of Waves - Demonstrating diffraction using ripple tank
Properties of Waves - Demonstrating interference using ripple tank

By the end of the lesson, the learner should be able to:

- Set up a ripple tank to demonstrate wave properties
- Demonstrate rectilinear propagation of waves in a ripple tank
- Connect the formation of bright and dark spots to how water waves behave

- Demonstrate diffraction of waves using a ripple tank
- Investigate how aperture size affects diffraction
- Connect diffraction to how radio waves reach behind buildings

In groups, learners are guided to:

- Set up a ripple tank with all accessories
- Observe how crests appear bright and troughs appear dark
- Place two straight rods perpendicular to the vibrating bar and observe wave direction

- Place two metal barriers with an aperture in front of plane waves
- Vary the aperture size from 8 cm to 0.5 cm and observe emerging waves
- Place an obstacle in front of waves and observe diffraction around it

How do waves move in a straight line?
What factors determine the extent of wave diffraction?

- Spotlight Physics Grade 10 pg. 154
- Ripple tank and accessories
- Dry cell and cell holder
- White manila paper
- Spotlight Physics Grade 10 pg. 156
- Ripple tank
- Straight metal reflector
- Concave and convex reflectors
- Spotlight Physics Grade 10 pg. 158
- Transparent glass plate
- Spotlight Physics Grade 10 pg. 159
- Ripple tank
- Two straight metal barriers
- Opaque obstacle
- Spotlight Physics Grade 10 pg. 160
- Two spherical balls
- White manila paper

- Practical assessment - Observation - Oral questions
- Practical assessment - Observation - Written assignments

Waves and Optics

Properties of Waves - Production of frequency modulated (FM) waves

By the end of the lesson, the learner should be able to:

- Explain the meaning of frequency modulation
- Describe methods of producing FM waves
- Connect FM to how radio stations broadcast music and news

In groups, learners are guided to:

- Use digital devices to research the meaning of FM and its production
- Discuss the difference between FM and AM
- Search for applications of frequency modulation

How are FM radio signals produced?

- Spotlight Physics Grade 10 pg. 161
- Digital resources
- Physics reference books

- Oral questions - Written assignments - Group presentations

Waves and Optics

Properties of Waves - Detection of frequency modulated (FM) waves
Properties of Waves - Formation of stationary waves

By the end of the lesson, the learner should be able to:

- Explain how FM waves are detected and demodulated
- Describe applications of FM in various fields
- Relate FM detection to how radios and television sets receive signals

In groups, learners are guided to:

- Discuss demodulation methods for FM signals
- Research applications of FM in radar systems, medical imaging, and telemetry
- Present findings on FM applications to classmates

How do radios detect and convert FM signals to sound?

- Spotlight Physics Grade 10 pg. 162
- Digital resources
- Radio receiver (demonstration)
- Spotlight Physics Grade 10 pg. 163
- Tuning fork
- String
- Mass (weight)
- Fixed pulley system

- Oral questions - Written tests - Research presentations

Waves and Optics

Properties of Waves - Factors affecting fundamental frequency of vibrating string

By the end of the lesson, the learner should be able to:

- Investigate factors affecting fundamental frequency of a vibrating string
- Determine the relationship between frequency, tension, and length
- Relate findings to tuning musical instruments like guitars and violins

In groups, learners are guided to:

- Set up a sonometer apparatus and vary tension while keeping length constant
- Vary the length between bridges while keeping tension constant
- Discuss the mathematical relationship f = (1/2L)√(T/μ)

How do tension and length affect the frequency of a vibrating string?

- Spotlight Physics Grade 10 pg. 164
- Sonometer apparatus
- Weights
- Two wooden wedges

- Practical assessment - Written tests - Oral questions

Waves and Optics

Properties of Waves - Modes of vibration in strings
Properties of Waves - Stationary waves in closed pipes
Properties of Waves - Harmonics in closed pipes

By the end of the lesson, the learner should be able to:

- Explain modes of vibration in strings
- Calculate frequencies of harmonics and overtones
- Connect harmonics to the rich sound quality of musical instruments

- Explain harmonics in closed pipes
- Calculate frequencies of overtones in closed pipes
- Connect closed pipe harmonics to the limited overtones in some wind instruments

In groups, learners are guided to:

- Discuss fundamental frequency and how it relates to wavelength
- Calculate first and second overtones using mathematical relationships
- Use the general formula for nth overtone: fn = (n+1)f₀

- Discuss the first harmonic (fundamental frequency) in closed pipes
- Calculate second and third harmonics using f = (2n-1)f₀
- Compare harmonic patterns in closed pipes with open pipes

What are harmonics and overtones in vibrating strings?
Why do closed pipes only produce odd harmonics?

- Spotlight Physics Grade 10 pg. 166
- Digital resources
- Charts showing modes of vibration
- Spotlight Physics Grade 10 pg. 167
- Glass tube
- Glass jar with water
- Tuning fork

- Spotlight Physics Grade 10 pg. 168
- Digital resources
- Charts showing harmonics

- Written tests - Oral questions - Problem-solving exercises
- Written tests - Problem-solving exercises - Oral questions

Waves and Optics

Properties of Waves - Stationary waves in open pipes
Properties of Waves - Meaning of Doppler effect

By the end of the lesson, the learner should be able to:

- Explain stationary wave formation in open pipes
- Calculate fundamental frequency and overtones in open pipes
- Relate open pipe resonance to how flutes and organ pipes produce sound

In groups, learners are guided to:

- Discuss how antinodes form at both ends of an open pipe
- Calculate wavelength and frequency relationships: L = λ/2
- Compare fundamental frequencies in open and closed pipes

How do stationary waves form in open pipes?

- Spotlight Physics Grade 10 pg. 169
- Digital resources
- Charts showing open pipe harmonics
- Spotlight Physics Grade 10 pg. 173
- Audio recordings of approaching vehicles

- Written tests - Oral questions - Problem-solving exercises

Waves and Optics

Properties of Waves - Demonstrating Doppler effect
Properties of Waves - Applications of Doppler effect

By the end of the lesson, the learner should be able to:

- Demonstrate Doppler effect using sound sources and ropes
- Observe changes in wavelength when source moves towards or away from observer
- Relate the demonstration to how radar speed guns measure vehicle speed

In groups, learners are guided to:

- Move an audio frequency generator towards and away from a stationary observer
- Use a rope to show compression and stretching of waves
- Discuss how wavelength decreases when source approaches and increases when receding

How does the movement of a sound source affect the waves detected by an observer?

- Spotlight Physics Grade 10 pg. 174
- Audio frequency generator
- Rope or spiral spring
- Spotlight Physics Grade 10 pg. 175
- Digital resources
- Charts showing Doppler applications

- Practical assessment - Observation - Oral questions

Waves and Optics

Radioactivity - Meaning of radioactivity and related terms

By the end of the lesson, the learner should be able to:

- Explain the meaning of radioactivity and related terms
- Define nuclear stability, half-life, nuclide, and radioisotope
- Relate radioactivity to smoke detectors and medical treatments

In groups, learners are guided to:

- Use digital resources to search for meanings of radioactivity terms
- Discuss the meaning of radioactive decay, background radiation, and nucleotide
- Share findings with classmates for peer review

What is radioactivity and why do some atoms decay?

- Spotlight Physics Grade 10 pg. 178
- Digital resources
- Physics reference books

- Oral questions - Written assignments - Group discussions

Waves and Optics

Radioactivity - Stability of isotopes and atomic structure
Radioactivity - Types of radiations (alpha, beta, gamma)
Radioactivity - Properties of alpha and beta particles

By the end of the lesson, the learner should be able to:

- Explain atomic structure in relation to radioactivity
- Describe how neutron-proton ratio affects nuclear stability
- Connect isotope stability to carbon dating of archaeological artifacts

- Describe properties of alpha and beta particles
- Compare penetrating power, ionizing ability, and speed of alpha and beta particles
- Connect alpha radiation properties to smoke detector operation

In groups, learners are guided to:

- Discuss the composition of atoms: protons, neutrons, and electrons
- Explain why a 1:1 neutron-proton ratio leads to stability
- Illustrate unstable nuclides using diagrams

- Discuss penetrating power: alpha stopped by paper, beta by aluminium
- Compare ionizing power: alpha highest, beta moderate
- Explain deflection in electric and magnetic fields

How does the neutron-proton ratio affect nuclear stability?
Why are alpha particles more ionizing but less penetrating than beta particles?

- Spotlight Physics Grade 10 pg. 180
- Digital resources
- Charts showing atomic structure
- Spotlight Physics Grade 10 pg. 181
- Charts showing radiation types

- Spotlight Physics Grade 10 pg. 182
- Digital resources
- Charts comparing radiation properties

- Written tests - Oral questions - Diagram labelling
- Written tests - Oral questions - Comparison tables

Waves and Optics

Radioactivity - Properties of gamma rays and comparison of radiations
Radioactivity - Alpha decay and nuclear equations

By the end of the lesson, the learner should be able to:

- Describe properties of gamma rays
- Compare all three types of radiations using charts and diagrams
- Relate gamma ray properties to their use in X-ray imaging and cancer treatment

In groups, learners are guided to:

- Discuss gamma ray properties: no charge, no mass, highest penetration
- Make charts comparing penetrating power, ionizing effect, and field deflection
- Use diagrams to illustrate effect of magnetic and electric fields on radiations

Why are gamma rays not deflected by electric or magnetic fields?

- Spotlight Physics Grade 10 pg. 183
- Digital resources
- Charts and diagrams
- Spotlight Physics Grade 10 pg. 186
- Periodic table

- Chart making - Written tests - Oral questions

Waves and Optics

Radioactivity - Beta decay and gamma decay equations

By the end of the lesson, the learner should be able to:

- Write nuclear equations for beta and gamma decay
- Explain how beta decay changes a neutron to a proton
- Relate beta decay to carbon-14 dating of organic materials

In groups, learners are guided to:

- Discuss beta decay: neutron changes to proton and electron
- Write nuclear equation for carbon-14 decaying to nitrogen-14
- Explain gamma decay as energy release without change in mass or atomic number

How do beta and gamma decay differ from alpha decay?

- Spotlight Physics Grade 10 pg. 187
- Digital resources
- Periodic table

- Written tests - Problem-solving exercises - Oral questions

Waves and Optics

Radioactivity - Uranium-238 decay series
Radioactivity - Detection using electroscope and GM tube

By the end of the lesson, the learner should be able to:

- Trace the uranium-238 natural decay series
- Write nuclear equations for chain decay reactions
- Connect decay series to geological dating of rocks

In groups, learners are guided to:

- Study the uranium-238 decay chain from U-238 to stable Pb-206
- Identify types of radiations emitted at each stage
- Write nuclear equations for each step in the decay series

How does uranium-238 eventually become stable lead-206?

- Spotlight Physics Grade 10 pg. 188
- Charts showing decay series
- Digital resources
- Spotlight Physics Grade 10 pg. 189
- Electroscope
- Diagrams of GM tube

- Chart interpretation - Written tests - Oral questions

Waves and Optics

Radioactivity - Cloud chambers and nuclear emulsion plates
Radioactivity - Meaning and demonstration of half-life
Radioactivity - Calculating half-life using graphs and formula

By the end of the lesson, the learner should be able to:

- Describe detection using expansion and diffusion cloud chambers
- Explain the use of nuclear emulsion plates
- Relate cloud chamber tracks to identifying different radiation types

- Explain the meaning of half-life
- Demonstrate half-life concept using water draining from a burette
- Relate half-life to how long radioactive waste remains dangerous

In groups, learners are guided to:

- Discuss the operation of expansion and diffusion cloud chambers
- Observe track patterns for alpha, beta, and gamma radiations
- Explain how nuclear emulsion plates record particle tracks

- Define half-life as time for half the radioactive atoms to decay
- Perform water drainage experiment to simulate radioactive decay
- Plot a graph of volume against time and determine half-life

How do cloud chambers make radiation tracks visible?
How long does it take for half of a radioactive sample to decay?

- Spotlight Physics Grade 10 pg. 190
- Diagrams of cloud chambers
- Digital resources
- Spotlight Physics Grade 10 pg. 193
- Burette
- Retort stand
- Stop clock
- Spotlight Physics Grade 10 pg. 195
- Graph paper
- Scientific calculators

- Diagram interpretation - Written tests - Oral questions
- Practical assessment - Graph plotting - Oral questions

Waves and Optics

Radioactivity - Significance and applications of half-life

By the end of the lesson, the learner should be able to:

- Explain the significance of half-life in various fields
- Describe applications in medicine, environment, and nuclear power
- Relate half-life to planning cancer treatment doses and nuclear waste storage

In groups, learners are guided to:

- Discuss significance in nuclear medicine and carbon dating
- Explain importance in nuclear waste management
- Research applications in pharmacokinetics and safety regulations

Why is understanding half-life important in medicine and nuclear power?

- Spotlight Physics Grade 10 pg. 197
- Digital resources
- Physics reference books

- Research presentations - Written tests - Oral questions

Waves and Optics

Radioactivity - Nuclear fission and chain reactions
Radioactivity - Nuclear fusion and applications

By the end of the lesson, the learner should be able to:

- Explain the meaning of nuclear fission
- Describe chain reactions in nuclear fission
- Relate nuclear fission to electricity generation in nuclear power plants

In groups, learners are guided to:

- Discuss how uranium-235 splits when bombarded with neutrons
- Explain how chain reactions release enormous energy
- Differentiate controlled reactions in reactors from uncontrolled reactions in bombs

How do nuclear power plants generate electricity from fission?

- Spotlight Physics Grade 10 pg. 198
- Diagrams of chain reactions
- Digital resources
- Spotlight Physics Grade 10 pg. 199
- Diagrams showing fusion

- Written tests - Diagram interpretation - Oral questions

Waves and Optics

Radioactivity - Applications in medicine and industry
Radioactivity - Applications in agriculture and archaeology

By the end of the lesson, the learner should be able to:

- Describe applications of radioactivity in medicine and industry
- Explain how gamma rays treat cancer and sterilize equipment
- Relate industrial applications to detecting pipe leaks and measuring thickness

In groups, learners are guided to:

- Discuss medical applications: cancer treatment, sterilization, imaging
- Explain industrial uses: detecting pipe bursts, thickness measurement, flaw detection
- Research use of radioactive tracers in various fields

How is radioactivity used to treat cancer and detect pipe leaks?

- Spotlight Physics Grade 10 pg. 200
- Diagrams showing applications
- Digital resources
- Digital resources
- Charts on carbon dating

- Research presentations - Written tests - Oral questions

Waves and Optics
Electricity and Magnetism

Radioactivity - Hazards of radiation and safety precautions
Origin of charges in a material
The law of electrostatics
Methods of charging conductors - Induction and Contact
Methods of charging conductors - Separation and charge distribution

By the end of the lesson, the learner should be able to:

- Describe hazards caused by radioactive materials
- Explain safety precautions when handling radioactive substances
- Relate safety measures to protection of workers in hospitals and nuclear facilities

- State the law of electrostatics
- Demonstrate attraction and repulsion between charged bodies
- Connect charge interactions to how dust sticks to TV screens

In groups, learners are guided to:

- Discuss effects of radiation exposure: burns, cancer, hereditary defects
- Explain precautions: avoiding direct contact, using forceps, lead storage
- Role-play safety scenarios in radiation handling
- Carry out activities to investigate the law of electrostatics using charged balloons
- Discuss with peers the interaction between like and unlike charges
- Record observations on charge interactions

What safety measures protect workers from radiation exposure?
Why do some charged objects attract while others repel?

- Spotlight Physics Grade 10 pg. 201
- Safety signs
- Digital resources
- Spotlight Physics Learner's Book pg. 205
- Plastic pen, woolen cloth
- Small pieces of paper
- Spotlight Physics Learner's Book pg. 207
- Balloons, woolen cloth
- Thread, retort stands
- Metre rule
- Spotlight Physics Learner's Book pg. 208
- Metallic spheres on insulated stands
- Charged polythene and glass rods
- Connecting wire for earthing
- Spotlight Physics Learner's Book pg. 211
- Two metallic spheres on insulated stands
- Charged rods
- Charts showing charge distribution

- Role-play assessment - Written tests - Oral questions
- Observation - Oral questions - Practical assessment

Electricity and Magnetism

Electric field patterns
The electroscope - Structure, charging and discharging
Uses of electroscope

By the end of the lesson, the learner should be able to:

- Define electric field and draw field lines
- Sketch electric field patterns for point charges, dipoles and parallel plates
- Relate electric field patterns to how capacitors store energy in electronic devices

In groups, learners are guided to:
- Discuss with peers electric field patterns around charged particles
- Draw field patterns for positive and negative point charges
- Sketch field patterns for like charges, unlike charges and parallel plates
- Use digital media to visualize electric fields

How do electric field lines represent the force on charges?

- Spotlight Physics Learner's Book pg. 214
- Charts showing electric field patterns
- Digital resources
- Drawing materials
- Spotlight Physics Learner's Book pg. 216
- Gold-leaf electroscope
- Charged polythene and glass rods
- Conical flask, aluminium foil, metal spoon
- Spotlight Physics Learner's Book pg. 219
- Various charged materials
- Conductors and insulators for testing

- Diagram sketching - Oral questions - Written tests

Electricity and Magnetism

Applications - Spray painting, precipitators and photocopiers
Applications - Lightning arrestors and safety measures

By the end of the lesson, the learner should be able to:

- Explain electrostatic applications in spray painting, precipitators and photocopiers
- Describe how electrostatic precipitators reduce pollution
- Relate electrostatic spray painting to even coating on car bodies

In groups, learners are guided to:
- Use print or non-print media to research applications of electrostatics
- Discuss how electrostatic spray painting ensures even paint distribution
- Explain the working of electrostatic precipitators in factories
- Describe how photocopiers use electrostatics

How does electrostatic spray painting ensure even coating?

- Spotlight Physics Learner's Book pg. 221
- Charts and diagrams
- Digital resources
- Videos on spray painting
- Spotlight Physics Learner's Book pg. 223
- Pictures of lightning arrestors
- Charts on safety measures
- Digital resources

- Oral questions - Written assignments - Research reports

Electricity and Magnetism

Applications - Touch screens, fingerprinting and capacitors
Current and potential difference
Electromotive force and internal resistance

By the end of the lesson, the learner should be able to:

- Explain electrostatic applications in touch screens and fingerprinting
- Describe the role of electrostatics in capacitors
- Connect capacitive touch technology to everyday smartphone use

In groups, learners are guided to:
- Discuss the principle behind capacitive touch screens
- Research on electrostatic fingerprinting and live scanning
- Explain how capacitors in electronic devices use electrostatic principles
- Explore air purifiers and other applications

How do smartphones detect finger touches using electrostatics?

- Spotlight Physics Learner's Book pg. 225
- Smartphones and tablets
- Digital resources
- Charts on touch screen technology
- Spotlight Physics Learner's Book pg. 228
- Dry cells, cell holders
- Ammeter, voltmeter, bulb
- Connecting wires, switch
- Spotlight Physics Learner's Book pg. 231
- Dry cells, two voltmeters
- Known resistors, switch
- Connecting wires

- Oral questions - Written tests - Research presentations

Electricity and Magnetism

Ohm's law - Verification and calculations
EMF equation and internal resistance determination
Ohmic and non-ohmic conductors
Factors affecting resistance - Length and cross-sectional area
Factors affecting resistance - Temperature and resistivity
Methods of determining resistance

By the end of the lesson, the learner should be able to:

- State and verify Ohm's law experimentally
- Apply Ohm's law equation V = IR to solve problems
- Connect Ohm's law to selecting appropriate fuses for home appliances

- Investigate the effect of length and cross-sectional area on resistance
- Establish relationships R ∝ L and R ∝ 1/A
- Relate wire dimensions to why thick, short cables are used for car batteries

In groups, learners are guided to:
- Set up circuit with nichrome wire, ammeter, voltmeter and rheostat
- Vary current and record corresponding voltages
- Plot graph of V against I and determine resistance from gradient
- Solve numerical problems using V = IR
- Set up circuit with nichrome wire on metre rule
- Measure resistance at different lengths and plot R against L
- Measure resistance of wires with different diameters
- Plot R against A and establish inverse relationship

What is the relationship between voltage and current for an ohmic conductor?
How do length and thickness of a wire affect its resistance?

- Spotlight Physics Learner's Book pg. 232
- Nichrome wire, ammeter
- Voltmeter, rheostat
- Dry cells, graph paper
- Spotlight Physics Learner's Book pg. 236
- Dry cells, ammeter
- Graph paper
- Spotlight Physics Learner's Book pg. 242
- Torch bulb, thermistor
- Semiconductor diode
- Ammeter, voltmeter, rheostat
- Spotlight Physics Learner's Book pg. 245
- Nichrome wire, metre rule
- Wires of different thickness
- Micrometer screw gauge, ammeter, voltmeter
- Spotlight Physics Learner's Book pg. 248
- Tungsten coil, beaker
- Thermometer, heat source
- Ammeter, voltmeter
- Spotlight Physics Learner's Book pg. 251
- Metre bridge, Wheatstone bridge components
- Galvanometer, jockey
- Resistors with colour codes

- Practical assessment - Graph plotting - Written calculations
- Practical assessment - Graph plotting - Written conclusions

Electricity and Magnetism

Types of resistors and current-voltage laws
Effective resistance in series and parallel

By the end of the lesson, the learner should be able to:

- Identify and classify types of resistors (fixed, variable, linear, non-linear)
- Verify laws of current and voltage in series and parallel circuits
- Connect resistor types to volume controls and temperature sensors

In groups, learners are guided to:
- Study different types of resistors and their applications
- Connect bulbs in series and verify I₁ = I₂ = I₃ and V = V₁ + V₂ + V₃
- Connect bulbs in parallel and verify I = I₁ + I₂ + I₃ and V₁ = V₂ = V₃
- Discuss applications of rheostats and potentiometers

Why is current the same in series but voltage the same in parallel?

- Spotlight Physics Learner's Book pg. 255
- Various types of resistors
- Identical bulbs, ammeters
- Voltmeters, dry cells
- Spotlight Physics Learner's Book pg. 263
- Resistors of known values
- Scientific calculators
- Circuit diagrams, worksheets

- Practical assessment - Oral questions - Written assignments

Electricity and Magnetism

Solving complex resistor network problems
Relationship of V, I and P - Power equations

By the end of the lesson, the learner should be able to:

- Analyse circuits with multiple series-parallel combinations
- Calculate current through and voltage across each resistor
- Apply circuit analysis to troubleshoot electrical faults in appliances

In groups, learners are guided to:
- Identify series and parallel sections in complex circuits
- Calculate effective resistance step by step
- Determine current distribution in branches
- Calculate potential difference across each component

How do we analyse circuits with both series and parallel resistors?

- Spotlight Physics Learner's Book pg. 267
- Complex circuit diagrams
- Scientific calculators
- Worksheets with problems
- Spotlight Physics Learner's Book pg. 270
- Power rating labels from appliances
- Worksheets

- Written calculations - Circuit analysis - Oral questions

Electricity and Magnetism

Factors affecting heating effect of electric current

By the end of the lesson, the learner should be able to:

- State Joule's law of electrical heating
- Investigate factors affecting heating effect (time, current, resistance)
- Relate heating factors to why electric kettles boil water faster than immersion heaters

In groups, learners are guided to:
- Investigate effect of time, current and resistance on heating
- Plot graphs of temperature change against time, I² and R
- Derive H = I²Rt (Joule's law)
- Discuss the significance of each factor

What factors determine the amount of heat produced by electric current?

- Spotlight Physics Learner's Book pg. 273
- Heating coils, beaker
- Thermometer, stopwatch
- Ammeter, voltmeter, rheostat

- Practical assessment - Graph plotting - Written conclusions

Electricity and Magnetism

Applications of heating effect of electric current
Power rating and electrical energy calculations
Conductors, semiconductors, insulators and superconductors
Distinguishing materials using energy band theory
Effect of temperature on conductors and semiconductors

By the end of the lesson, the learner should be able to:

- Describe applications of heating effect in electrical appliances
- Explain the working of electric heaters, kettles, iron boxes and fuses
- Relate heating applications to safe and efficient use of electrical devices at home

- Define conductors, semiconductors, insulators and superconductors
- Explain the atomic structure basis for material classification
- Relate material classification to choosing appropriate wires and insulation for electrical installations

In groups, learners are guided to:
- Research on electrical appliances that use heating effect
- Classify appliances as heating devices, kitchenware or lighting devices
- Discuss the working of electric iron, kettle, heater and filament lamp
- Explain the function and selection of appropriate fuses
- Discuss the atomic structure of silicon, copper and other materials
- Compare the number of valence electrons in different materials
- Research on characteristics of conductors, semiconductors, insulators and superconductors
- Classify materials based on their electrical properties

How is the heating effect of electric current applied in household appliances?
What determines whether a material is a conductor, semiconductor or insulator?

- Spotlight Physics Learner's Book pg. 277
- Pictures of electrical appliances
- Fuses of different ratings
- Digital resources
- Spotlight Physics Learner's Book pg. 278
- Power rating labels
- Scientific calculators
- Electricity tariff information
- Spotlight Physics Learner's Book pg. 282
- Models of atomic structures
- Charts showing material classification
- Digital resources
- Spotlight Physics Learner's Book pg. 284
- Charts showing energy bands
- Digital resources
- Drawing materials
- Spotlight Physics Learner's Book pg. 286
- Tungsten coil, thermistor
- Beaker, thermometer
- Heat source, ammeter, voltmeter

- Oral questions - Written assignments - Research presentations
- Oral questions - Classification exercises - Written assignments

Electricity and Magnetism

Intrinsic semiconductors and doping
N-type and p-type semiconductors
Applications of conductors and insulators
Applications of semiconductors and superconductors
Application of conductors and insulators in car wiring system

By the end of the lesson, the learner should be able to:

- Define intrinsic and extrinsic semiconductors
- Explain the process of doping and its effect on conductivity
- Connect doping process to manufacturing of computer chips and solar cells

In groups, learners are guided to:
- Discuss the meaning of intrinsic (pure) semiconductors like silicon and germanium
- Research on the doping process
- Explain how adding impurities creates extra charge carriers
- Distinguish between intrinsic and extrinsic semiconductors

How does doping improve the conductivity of semiconductors?

- Spotlight Physics Learner's Book pg. 288
- Charts showing doping process
- Digital resources
- Models of crystal structures
- Spotlight Physics Learner's Book pg. 289
- Diagrams of crystal lattice
- Charts showing n-type and p-type formation
- Digital resources
- Spotlight Physics Learner's Book pg. 292
- Samples of electrical cables
- Pictures of electrical installations
- Spotlight Physics Learner's Book pg. 293
- Electronic components
- Pictures of semiconductor devices
- Spotlight Physics Learner's Book pg. 294
- Car wiring diagrams
- Samples of automotive cables
- Resource persons (mechanics)

- Oral questions - Written explanations - Research reports