Electricity and Magnetism

Origin of charges in a material

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

- Define electric charge and state its SI unit
- Describe the atomic structure and origin of charges in materials
- Relate static electricity to everyday experiences like clothes clinging after tumble drying

In groups, learners are guided to:
- Discuss with peers the origin of charges on materials (atom, nucleus, neutrons, protons and electrons)
- Use digital resources to search for information on atomic structure
- Perform experiments to demonstrate generation of static charges through rubbing plastic pen on woolen cloth

How do materials acquire electric charges?

- Spotlight Physics Learner's Book pg. 205
- Plastic pen, woolen cloth
- Small pieces of paper
- Digital resources

- Oral questions - Observation - Written assignments

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

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

In groups, learners are guided to:
- 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

Why do some charged objects attract while others repel?

- 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

- Observation - Oral questions - Practical assessment

Electricity and Magnetism

The electroscope - Structure, charging and discharging
Uses of electroscope
Applications - Spray painting, precipitators and photocopiers

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

- Identify and explain functions of parts of a gold-leaf electroscope
- Demonstrate charging an electroscope by induction and contact
- Connect electroscope principles to static charge detectors in industry

In groups, learners are guided to:
- Study the various parts of the electroscope and their functions
- Carry out activities to charge an electroscope by induction and contact
- Demonstrate earthing/discharging of an electroscope
- Construct a simple electroscope using locally available materials

How does the leaf of an electroscope respond to charging?

- 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
- Spotlight Physics Learner's Book pg. 221
- Charts and diagrams
- Digital resources
- Videos on spray painting

- Practical assessment - Observation - Oral questions

Electricity and Magnetism

Applications - Lightning arrestors and safety measures
Applications - Touch screens, fingerprinting and capacitors

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

- Explain the design and function of lightning arrestors
- Describe safety measures in transportation of flammable substances
- Relate lightning arrestors to protection of buildings during thunderstorms

In groups, learners are guided to:
- Discuss the design and function of lightning arrestors
- Explain why metallic chains are attached to fuel tankers
- Research safety in transportation of flammable liquids and gases
- Discuss why people should not stand under trees during storms

Why are lightning arrestors installed on tall buildings?

- Spotlight Physics Learner's Book pg. 223
- Pictures of lightning arrestors
- Charts on safety measures
- Digital resources
- Spotlight Physics Learner's Book pg. 225
- Smartphones and tablets
- Digital resources
- Charts on touch screen technology

- Oral questions - Written assignments - Group discussions

Electricity and Magnetism

Current and potential difference
Electromotive force and internal resistance
Ohm's law - Verification and calculations
EMF equation and internal resistance determination

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

- Define electric current and potential difference with their SI units
- Measure current using ammeter and potential difference using voltmeter
- Relate current flow to water flow in pipes for practical understanding

In groups, learners are guided to:
- Set up simple circuits with cells, bulb, ammeter and voltmeter
- Discuss current as rate of flow of charge (I = Q/t)
- Discuss potential difference as work done per unit charge (V = W/Q)
- Measure and record current and voltage in circuits

What is the relationship between charge, current and potential difference?

- 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
- 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

- Practical assessment - Oral questions - Written calculations

Electricity and Magnetism

Ohmic and non-ohmic conductors
Factors affecting resistance - Length and cross-sectional area
Factors affecting resistance - Temperature and resistivity

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

- Classify conductors as ohmic or non-ohmic based on V-I characteristics
- Investigate V-I relationship of torch bulb, thermistor and diode
- Relate non-ohmic behaviour to why bulbs are dim when first switched on

In groups, learners are guided to:
- Investigate V-I relationship of different conductors
- Draw I-V characteristic graphs for tungsten, torch bulb, thermistor and diode
- Classify conductors based on their graphs
- Compare behaviour of ohmic and non-ohmic conductors

Why do some conductors not obey Ohm's law?

- 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

- Practical assessment - Graph plotting - Oral questions

Electricity and Magnetism

Methods of determining resistance
Types of resistors and current-voltage laws

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

- Determine resistance using voltmeter-ammeter, metre bridge and Wheatstone bridge methods
- Read resistance values using colour codes
- Apply different methods to verify resistor values in electronic repair

In groups, learners are guided to:
- Determine resistance using V-A method and calculate from R = V/I
- Set up metre bridge to find unknown resistance using K/Y = P/Q
- Connect Wheatstone bridge and calculate using K/P = L/Q
- Read resistance from colour bands on resistors

Which method is most accurate for measuring resistance?

- 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

- Practical assessment - Written calculations - Identification exercises

Electricity and Magnetism

Effective resistance in series and parallel
Solving complex resistor network problems

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

In groups, learners are guided to:
- 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
- Spotlight Physics Learner's Book pg. 267
- Complex circuit diagrams
- Worksheets with problems

- Written calculations - Problem-solving tests - 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

In groups, learners are guided to:
- 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

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

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

How is the heating effect of electric current applied in household 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

- Oral questions - Written assignments - Research presentations

Electricity and Magnetism

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:

- 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:
- 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

What determines whether a material is a conductor, semiconductor or insulator?

- 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 - Classification exercises - Written assignments

Electricity and Magnetism

Intrinsic semiconductors and doping
N-type and p-type semiconductors
Applications of conductors and insulators

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

- Oral questions - Written explanations - Research reports

Electricity and Magnetism
Environmental and Space Physics
Environmental and Space Physics

Applications of semiconductors and superconductors
Application of conductors and insulators in car wiring system
Greenhouse Effect and Climate Change - Greenhouse effect and climate change in the environment
Greenhouse Effect and Climate Change - Physical drivers of climate change

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

- Describe applications of semiconductors in electronics and sensors
- Describe applications of superconductors in modern technology
- Connect semiconductor applications to smartphones, computers, solar panels and medical equipment

In groups, learners are guided to:
- Research on semiconductor applications (transistors, diodes, LEDs, thermistors, solar cells)
- Discuss use of thermistors in temperature sensors and fire alarms
- Explain applications of superconductors (MRI machines, maglev trains, power transmission)
- Discuss future potential of superconductors

How are semiconductors used in modern electronic devices?

- Spotlight Physics Learner's Book pg. 293
- Electronic components
- Pictures of semiconductor devices
- Digital resources
- Spotlight Physics Learner's Book pg. 294
- Car wiring diagrams
- Samples of automotive cables
- Digital resources
- Resource persons (mechanics)
- Spotlight Physics Learner's Book Grade 10 pg. 297
- Clear plastic bottles/jars
- Thermometers
- Plastic wrap
- Digital devices
- Spotlight Physics Learner's Book Grade 10 pg. 298
- Charts showing greenhouse effect

- Oral questions - Written assignments - Research presentations

Environmental and Space Physics

Greenhouse Effect and Climate Change - Factors leading to greenhouse effect
Greenhouse Effect and Climate Change - Agricultural and livestock contributions
Greenhouse Effect and Climate Change - Role of ozone layer

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

- Identify human activities that contribute to greenhouse effect
- Explain how burning fossil fuels and deforestation increase greenhouse gases
- Connect industrial emissions to air quality changes observed in urban areas

In groups, learners are guided to:

- Discuss how activities like burning fossil fuels, deforestation and industrial processes contribute to greenhouse effect
- Analyse pictures showing human activities that lead to greenhouse effect
- Visit nearby areas to observe sources of greenhouse gas emissions

What human activities increase greenhouse gas emissions in the atmosphere?

- Spotlight Physics Learner's Book Grade 10 pg. 299
- Pictures of industrial activities
- Digital resources
- Spotlight Physics Learner's Book Grade 10 pg. 300
- Charts showing greenhouse gas sources
- Digital devices
- Spotlight Physics Learner's Book Grade 10 pg. 301
- Diagrams of ozone layer

- Observation - Oral questions - Written assignments

Environmental and Space Physics

Greenhouse Effect and Climate Change - Ozone depletion and climate change
Greenhouse Effect and Climate Change - Strategies for mitigating climate change
Greenhouse Effect and Climate Change - Effects of climate change on environment

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

- Explain causes of ozone layer depletion
- Describe the link between ozone depletion and climate change
- Relate the ban on CFCs to efforts in preserving the ozone layer

In groups, learners are guided to:

- Discuss how CFCs and other chemicals deplete the ozone layer
- Search for information on the relationship between ozone depletion and climate change
- Discuss the effects of ozone depleting substances on climate

How does ozone layer depletion affect climate change?

- Spotlight Physics Learner's Book Grade 10 pg. 301
- Charts on ozone depletion
- Digital devices
- Spotlight Physics Learner's Book Grade 10 pg. 302
- Pictures of renewable energy sources
- Digital resources
- Spotlight Physics Learner's Book Grade 10 pg. 305
- Pictures showing climate change effects

- Observation - Oral questions - Written tests

Environmental and Space Physics

Introduction to Space Physics - Big Bang Theory
Introduction to Space Physics - Stars, planets and satellites
Introduction to Space Physics - Asteroids, comets, meteors and galaxies
Introduction to Space Physics - Space exploration methods and telescopy
Introduction to Space Physics - Motion of planets around the sun
Introduction to Space Physics - Careers in space exploration

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

- Explain the Big Bang Theory on the origin of the universe
- Describe the evidence supporting the Big Bang Theory
- Connect the expanding universe concept to observable phenomena like distant galaxies moving away

In groups, learners are guided to:

- Use digital devices or reference materials to search for information on Big Bang Theory
- Discuss the origin of universe according to Big Bang Theory
- Share findings with classmates for peer review

How did the universe begin according to the Big Bang Theory?

- Spotlight Physics Learner's Book Grade 10 pg. 308
- Charts on Big Bang Theory
- Digital resources
- Spotlight Physics Learner's Book Grade 10 pg. 309
- Photos of celestial bodies
- Digital devices
- Spotlight Physics Learner's Book Grade 10 pg. 311
- Pictures of comets and galaxies
- Spotlight Physics Learner's Book Grade 10 pg. 312
- Lenses, manila paper, glue
- Pictures of telescopes
- Spotlight Physics Learner's Book Grade 10 pg. 316
- Models of solar system
- Charts on Kepler's laws
- Spotlight Physics Learner's Book Grade 10 pg. 318
- Career charts

- Oral questions - Group presentations - Written assignments