Mechanics and Thermal Physics

Energy, Work, Power and Machines - Definition of work

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

- Define work as product of force and displacement
- State the SI unit of work as joule
- Differentiate between work done and no work done like pushing a wall versus pushing a wheelbarrow

- Discuss scenarios where work is done and not done
- Calculate work done in lifting and pushing objects
- Relate work to force and displacement

When do we say work is done in Physics?

- Spotlight Physics Learner's Book pg. 105
- Spring balance
- Metre rule
- Various objects

- Oral questions - Written tests - Observation

Mechanics and Thermal Physics

Energy, Work, Power and Machines - Calculating work done
Energy, Work, Power and Machines - Energy and its forms
Energy, Work, Power and Machines - Definition and calculation of power
Energy, Work, Power and Machines - Kinetic energy
Energy, Work, Power and Machines - Gravitational potential energy

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

- Calculate work done using W = F × d
- Measure work done experimentally
- Apply work calculations to lifting luggage, climbing stairs and pulling carts

- Define power as rate of doing work
- Calculate power using P = W/t or P = F × v
- Compare power ratings of different electrical appliances like kettles, bulbs and heaters

- Measure force and distance to calculate work done
- Solve numerical problems on work
- Discuss work done against gravity and friction
- Calculate power from work and time measurements
- Compare power of different activities
- Solve numerical problems on power

How much work is done when lifting a 10 kg mass through 2 metres?
Why do some appliances consume more electricity than others?

- Spotlight Physics Learner's Book pg. 107
- Spring balance
- Known masses
- Metre rule
- Stopwatch
- Spotlight Physics Learner's Book pg. 108
- Various objects
- Pictures of energy sources
- Digital resources
- Spotlight Physics Learner's Book pg. 108
- Stopwatch
- Spring balance
- Known masses
- Calculators
- Spotlight Physics Learner's Book pg. 112
- Toy car
- Ramp
- Measuring tape
- Beam balance
- Spotlight Physics Learner's Book pg. 114
- Small weights
- Metre rule
- Beam balance
- Stand

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

Mechanics and Thermal Physics

Energy, Work, Power and Machines - Elastic potential energy
Energy, Work, Power and Machines - Conservation of mechanical energy
Energy, Work, Power and Machines - Energy transformations

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

- Define elastic potential energy
- Demonstrate elastic P.E in stretched materials
- Connect elastic potential energy to catapults, bow and arrow, and car shock absorbers

- Stretch rubber bands and release to propel objects
- Investigate elastic P.E in springs
- Calculate elastic P.E using area under F-e graph

How do stretched materials store energy?

- Spotlight Physics Learner's Book pg. 116
- Rubber bands
- Springs
- Small objects
- Paper balls
- Spotlight Physics Learner's Book pg. 118
- Pendulum bob
- String
- Stand
- Metre rule
- Spotlight Physics Learner's Book pg. 121
- Digital resources
- Pictures of machines
- Reference books

- Practical assessment - Observation - Written questions

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

- 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

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

- Discuss meaning of MA, VR and efficiency
- Calculate MA and VR from experimental data
- Relate efficiency to energy losses

Why is the efficiency of machines always less than 100%?

- Spotlight Physics Learner's Book pg. 129
- Simple machines
- Spring balance
- Known masses
- Metre rule

- Written tests - Problem-solving - Practical assessment

Mechanics and Thermal Physics

Energy, Work, Power and Machines - Levers
Energy, Work, Power and Machines - Pulleys
Energy, Work, Power and Machines - Inclined plane and screw

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

- Calculate MA and VR of levers
- Apply principle of moments to levers
- Relate lever calculations to using crowbars, scissors and wheelbarrows

- 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

- Set up different classes of levers
- Calculate MA and VR experimentally
- Solve problems on levers
- Roll objects up inclined plane at different angles
- Calculate VR of inclined plane
- Discuss relationship between screw and inclined plane

How does the position of the fulcrum affect the mechanical advantage of a lever?
How does the angle of inclination affect the effort required?

- Spotlight Physics Learner's Book pg. 131
- Lever apparatus
- Known masses
- Spring balance
- Metre rule
- Pulleys
- String
- Stand
- Spotlight Physics Learner's Book pg. 134
- Inclined plane
- Screw jack
- Spring balance
- Metre rule

- Practical assessment - Written tests - Problem-solving

Mechanics and Thermal Physics

Energy, Work, Power and Machines - Wheel and axle, gears

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

- Calculate VR of wheel and axle
- Calculate VR of gear systems
- Connect wheel and axle to steering wheels and door knobs, and gears to bicycles and car gearboxes

- Demonstrate wheel and axle operation
- Calculate VR of gear systems with different teeth
- Solve problems on wheel and axle and gears

How do gears change speed and force?

- Spotlight Physics Learner's Book pg. 137
- Wheel and axle model
- Gear wheels
- Bicycle

- Practical assessment - Written tests - Oral questions

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

- 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

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

- 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

- Observation - Oral questions - Written tests

Waves and Optics

Properties of Waves - Interference of waves
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

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

- Explain the meaning of interference of waves
- Demonstrate constructive and destructive interference using two speakers
- Relate interference to hearing loud and quiet zones in concert halls

- Demonstrate refraction of waves using a ripple tank
- Observe changes in wavelength as waves move from deep to shallow water
- Connect wave refraction to how light bends when entering water

- Set up two identical speakers connected to the same audio frequency generator
- Walk along a line perpendicular to the speakers and observe loud and quiet areas
- Discuss constructive and destructive interference patterns

- Create a shallow region in the ripple tank using a transparent glass plate
- Produce straight plane waves and observe separation of ripples
- Tilt the glass plate at an acute angle and observe wave bending

Why do we hear areas of loud and soft sound when two speakers play together?
Why does the wavelength change when waves move from deep to shallow water?

- Spotlight Physics Grade 10 pg. 152
- Two identical speakers
- Audio frequency generator
- Digital resources
- 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
- Ripple tank
- Transparent glass plate
- White manila paper
- Spotlight Physics Grade 10 pg. 159
- Two straight metal barriers
- Opaque obstacle

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

Waves and Optics

Properties of Waves - Demonstrating interference using ripple tank

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

- Demonstrate interference of waves using a ripple tank
- Identify constructive and destructive interference patterns
- Relate interference patterns to noise-cancelling headphones and acoustic design

- Fix two spherical balls below the vibrator bar as coherent sources
- Observe dark and bright radial lines showing interference pattern
- Discuss how bright lines show constructive and dark lines show destructive interference

How are interference patterns formed in a ripple tank?

- Spotlight Physics Grade 10 pg. 160
- Ripple tank
- Two spherical balls
- White manila paper

- Practical assessment - Observation - Oral questions

Waves and Optics

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

- 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
- Spotlight Physics Grade 10 pg. 162
- Radio receiver (demonstration)

- Oral questions - Written assignments - Group presentations

Waves and Optics

Properties of Waves - Formation of stationary waves

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

- Explain the meaning of stationary waves
- Demonstrate formation of stationary waves using a tuning fork and string
- Connect stationary waves to how guitar strings produce different notes

- Fix a string to a tuning fork prong and pass over a fixed pulley
- Strike the tuning fork and observe nodes and antinodes
- Discuss how incident and reflected waves superimpose to form stationary waves

How are stationary waves formed in a vibrating string?

- Spotlight Physics Grade 10 pg. 163
- Tuning fork
- String
- Mass (weight)
- Fixed pulley system

- Practical assessment - Observation - Oral questions

Waves and Optics

Properties of Waves - Factors affecting fundamental frequency of vibrating string
Properties of Waves - Modes of vibration in strings
Properties of Waves - Stationary waves in closed pipes

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

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

- 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)

- 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

How do tension and length affect the frequency of a vibrating string?
What are harmonics and overtones in vibrating strings?

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

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

Waves and Optics

Properties of Waves - Harmonics in closed pipes

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

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

- 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

Why do closed pipes only produce odd harmonics?

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

- Written tests - Problem-solving exercises - Oral questions

Waves and Optics

Properties of Waves - Stationary waves in open pipes

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

- 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

- Written tests - Oral questions - Problem-solving exercises

Waves and Optics

Properties of Waves - Meaning of Doppler effect
Properties of Waves - Demonstrating Doppler effect

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

- Explain the meaning of Doppler effect
- Describe how sound frequency changes with relative motion
- Connect Doppler effect to the changing pitch of an ambulance siren

- Discuss the scenario of a blind man detecting vehicle movement by sound
- Explain why the pitch of a siren increases when approaching and decreases when receding
- Research the discovery of Doppler effect by Christian Doppler

Why does the pitch of a siren change as an ambulance passes by?

- Spotlight Physics Grade 10 pg. 173
- Digital resources
- Audio recordings of approaching vehicles
- Spotlight Physics Grade 10 pg. 174
- Audio frequency generator
- Rope or spiral spring

- Oral questions - Observation - Written assignments

Waves and Optics

Properties of Waves - Applications of Doppler effect
Radioactivity - Meaning of radioactivity and related terms

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

- Describe applications of Doppler effect in various fields
- Explain how Doppler effect is used in astronomy, medicine, and traffic control
- Connect Doppler applications to ultrasound scans and weather forecasting

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

- Research applications in astronomy for measuring galaxy movements
- Discuss medical imaging applications like Doppler sonography
- Explore traffic radar and speed camera applications

- 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

How is Doppler effect used in medicine and traffic control?
What is radioactivity and why do some atoms decay?

- Spotlight Physics Grade 10 pg. 175
- Digital resources
- Charts showing Doppler applications

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

- Research presentations - Written tests - Oral questions
- Oral questions - Written assignments - Group discussions

Waves and Optics

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

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

- 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

How does the neutron-proton ratio affect nuclear stability?

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

- Written tests - Oral questions - Diagram labelling

Waves and Optics

Radioactivity - Properties of alpha and beta particles

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

- 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

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

Why are alpha particles more ionizing but less penetrating than beta particles?

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

- Written tests - Oral questions - Comparison tables

Waves and Optics

Radioactivity - Properties of gamma rays and comparison of radiations

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

- 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

- Chart making - Written tests - Oral questions

Waves and Optics

Radioactivity - Alpha decay and nuclear equations
Radioactivity - Beta decay and gamma decay equations
Radioactivity - Uranium-238 decay series

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

- Write nuclear equations for alpha decay
- Balance nuclear equations showing conservation of mass and charge
- Connect alpha decay to how smoke detectors use americium-241

- 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

- Discuss how alpha emission reduces nucleon number by 4 and proton number by 2
- Write nuclear equation for radium-226 decaying to radon-222
- Practice balancing nuclear equations

- 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 we write nuclear equations for alpha decay?
How do beta and gamma decay differ from alpha decay?

- Spotlight Physics Grade 10 pg. 186
- Digital resources
- Periodic table
- Spotlight Physics Grade 10 pg. 187
- Digital resources
- Periodic table
- Spotlight Physics Grade 10 pg. 188
- Charts showing decay series
- Digital resources

- Written tests - Problem-solving exercises - Oral questions

Waves and Optics

Radioactivity - Detection using electroscope and GM tube

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

- Describe detection of radioactive emissions using electroscope
- Explain the structure and operation of a Geiger-Müller tube
- Relate GM tube operation to radiation monitoring in nuclear power plants

- Demonstrate how a charged electroscope loses charge near a radioactive source
- Discuss the components and operation of a GM tube
- Explain how ionization produces pulses counted by a scaler

How does a Geiger-Müller tube detect radiation?

- Spotlight Physics Grade 10 pg. 189
- Electroscope
- Diagrams of GM tube

- Practical demonstration - Oral questions - Written tests

Waves and Optics

Radioactivity - Cloud chambers and nuclear emulsion plates

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

- 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

How do cloud chambers make radiation tracks visible?

- Spotlight Physics Grade 10 pg. 190
- Diagrams of cloud chambers
- Digital resources

- Diagram interpretation - Written tests - Oral questions

Waves and Optics

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:

- 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

- 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 long does it take for half of a radioactive sample to decay?

- Spotlight Physics Grade 10 pg. 193
- Burette
- Retort stand
- Stop clock
- Spotlight Physics Grade 10 pg. 195
- Graph paper
- Scientific calculators

- Practical assessment - Graph plotting - Oral questions

Waves and Optics

Radioactivity - Significance and applications of half-life
Radioactivity - Nuclear fission and chain reactions

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

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

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

- 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

Why is understanding half-life important in medicine and nuclear power?
How do nuclear power plants generate electricity from fission?

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

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

- Research presentations - Written tests - Oral questions
- Written tests - Diagram interpretation - Oral questions

Waves and Optics

Radioactivity - Nuclear fusion and applications
Radioactivity - Applications in medicine and industry

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

- Explain the meaning of nuclear fusion
- Compare nuclear fusion with fission
- Relate fusion to how the sun and stars produce energy

- Discuss how light nuclei combine to form heavier nuclei
- Explain why fusion requires extremely high temperatures
- Compare energy released in fusion versus fission reactions

Why does nuclear fusion power the sun and stars?

- Spotlight Physics Grade 10 pg. 199
- Diagrams showing fusion
- Digital resources
- Spotlight Physics Grade 10 pg. 200
- Diagrams showing applications

- Written tests - Comparison tables - Oral questions

Waves and Optics

Radioactivity - Applications in agriculture and archaeology

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

- Describe applications of radioactivity in agriculture and archaeology
- Explain carbon dating principles
- Relate radioactive tracers to studying plant fertilizer absorption

- Discuss carbon dating for determining age of fossils and artifacts
- Explain use of radioactive tracers in agriculture
- Calculate ages using carbon-14 decay principles

How do scientists use carbon dating to determine the age of fossils?

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

- Written tests - Problem-solving - Oral questions

Waves and Optics
Electricity and Magnetism

Radioactivity - Hazards of radiation and safety precautions
Origin of charges in a material

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

- 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

What safety measures protect workers from radiation exposure?

- 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

- Role-play assessment - Written tests - Oral questions

Electricity and Magnetism

The law of electrostatics
Methods of charging conductors - Induction and Contact
Methods of charging conductors - Separation and charge distribution
Electric field patterns
The electroscope - Structure, charging and discharging

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

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

- 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

- 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
- 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

Why do some charged objects attract while others repel?
How do electric field lines represent the force on charges?

- 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
- 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

- Observation - Oral questions - Practical assessment
- Diagram sketching - Oral questions - Written tests

Electricity and Magnetism

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

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

- Describe uses of an electroscope
- Demonstrate testing for presence, type and quantity of charge
- Apply electroscope principles to quality control testing in manufacturing

- Perform experiments to test for presence of charge on a body
- Determine the type of charge using a charged electroscope
- Measure relative quantity of charge
- Test conducting and insulating properties of materials

How can an electroscope determine the type of charge on a body?

- Spotlight Physics Learner's Book pg. 219
- Gold-leaf electroscope
- Various charged materials
- Conductors and insulators for testing
- 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

- Practical assessment - Oral questions - Written tests

Electricity and Magnetism

Applications - Touch screens, fingerprinting and capacitors
Current and potential difference

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

- 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

- Oral questions - Written tests - Research presentations

Electricity and Magnetism

Electromotive force and internal resistance
Ohm's law - Verification and calculations

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

- Define electromotive force and internal resistance
- Distinguish between EMF and terminal potential difference
- Relate internal resistance to why old batteries provide less power

- Connect voltmeters across a cell in open and closed circuits
- Compare voltmeter readings when switch is open and closed
- Discuss lost voltage and internal resistance
- Derive the relationship E = V + Ir

Why does a cell's voltage drop when connected in a circuit?

- Spotlight Physics Learner's Book pg. 231
- Dry cells, two voltmeters
- Known resistors, switch
- Connecting wires
- Spotlight Physics Learner's Book pg. 232
- Nichrome wire, ammeter
- Voltmeter, rheostat
- Dry cells, graph paperk

- Practical assessment - Oral questions - Written calculations

Electricity and Magnetism

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
Types of resistors and current-voltage laws

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

- Derive and apply the relationship E = I(R+r)
- Determine internal resistance graphically using V-I graph
- Apply EMF calculations to assess battery quality and performance

- Investigate the effect of temperature on resistance of conductors
- Define resistivity and apply ρ = RA/L
- Relate temperature effects to why light bulbs glow brighter when hot

- Derive E = IR + Ir mathematically
- Vary current in a circuit and record terminal voltages
- Plot graph of V against I to determine r from gradient and E from y-intercept
- Solve problems involving EMF and internal resistance
- Heat a coil of wire and measure resistance at different temperatures
- Plot R-T graphs for conductors and semiconductors
- Derive resistivity formula from R = ρL/A
- Calculate and compare resistivity of different materials

How can we determine internal resistance of a cell graphically?
How does temperature affect the resistance of a conductor?

- Spotlight Physics Learner's Book pg. 236
- Dry cells, ammeter
- Voltmeter, rheostat
- 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
- Spotlight Physics Learner's Book pg. 255
- Various types of resistors
- Identical bulbs, ammeters
- Voltmeters, dry cells

- Graph plotting - Written calculations - Oral questions
- Practical assessment - Graph plotting - Written calculations

Electricity and Magnetism

Effective resistance in series and parallel

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

- Derive and apply formulas for effective resistance in series and parallel
- Calculate effective resistance in mixed circuits
- Apply resistance calculations to design circuits for specific purposes

- Derive R_T = R₁ + R₂ + R₃ for series circuits
- Derive 1/R_T = 1/R₁ + 1/R₂ + 1/R₃ for parallel circuits
- Solve problems involving series, parallel and combination circuits
- Calculate current and voltage in each resistor

How do we calculate total resistance in series and parallel circuits?

- Spotlight Physics Learner's Book pg. 263
- Resistors of known values
- Scientific calculators
- Circuit diagrams, worksheets

- Written calculations - Problem-solving tests - Oral questions

Electricity and Magnetism

Solving complex resistor network problems

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

- 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

- Written calculations - Circuit analysis - Oral questions

Electricity and Magnetism

Relationship of V, I and P - Power equations
Factors affecting heating effect of electric current

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

- Derive and apply power equations P = VI, P = I²R and P = V²/R
- Calculate power consumption of electrical devices
- Relate power ratings to energy efficiency of household appliances

- Discuss electrical power as rate of energy conversion
- Derive power equations from P = W/t and Ohm's law
- Calculate power in circuits using different formulas
- Compare power ratings of various appliances

What is the relationship between voltage, current and power?

- Spotlight Physics Learner's Book pg. 270
- Scientific calculators
- Power rating labels from appliances
- Worksheets
- Spotlight Physics Learner's Book pg. 273
- Heating coils, beaker
- Thermometer, stopwatch
- Ammeter, voltmeter, rheostat

- Written calculations - Oral questions - Problem-solving tests

Electricity and Magnetism

Applications of heating effect of electric current
Power rating and electrical energy calculations
Conductors, semiconductors, insulators and superconductors

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

- Interpret power ratings on electrical appliances
- Calculate electrical energy consumption using E = Pt
- Apply energy calculations to reduce electricity bills at home

- 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
- Read and interpret power ratings on appliance labels
- Calculate energy consumed in joules and kilowatt-hours
- Calculate cost of running appliances using electricity tariffs
- Discuss energy-saving practices

How is the heating effect of electric current applied in household appliances?
How do we calculate the cost of running electrical appliances?

- 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

- Oral questions - Written assignments - Research presentations
- Written calculations - Oral questions - Problem-solving tests

Electricity and Magnetism

Distinguishing materials using energy band theory
Effect of temperature on conductors and semiconductors
Intrinsic semiconductors and doping

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

- Explain energy band theory (valence band, conduction band, forbidden gap)
- Distinguish between conductors, semiconductors and insulators using band diagrams
- Connect energy bands to how LEDs produce light of specific colours

- Discuss the concept of valence band, conduction band and forbidden energy gap
- Draw energy band diagrams for conductors, semiconductors and insulators
- Compare the size of energy gaps in different materials
- Explain electron movement in terms of energy bands

How does energy band theory explain electrical conductivity?

- 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
- Spotlight Physics Learner's Book pg. 288
- Charts showing doping process
- Models of crystal structures

- Diagram drawing - Oral questions - Written explanations

Electricity and Magnetism

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:

- Explain the formation of n-type and p-type semiconductors
- Identify majority and minority charge carriers in each type
- Relate n-type and p-type semiconductors to diode and transistor construction

- Discuss doping silicon with pentavalent atoms (P, As, Sb) to form n-type
- Draw diagrams showing electrons as majority carriers in n-type
- Discuss doping with trivalent atoms (B, Al, Ga) to form p-type
- Draw diagrams showing holes as majority carriers in p-type

How are n-type and p-type semiconductors formed?

- 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
- Digital resources
- Resource persons (mechanics)

- Diagram drawing - Oral questions - Written comparisons