Waves and Optics

Properties of Waves - Wave properties in real-life situations

By the end of the lesson, the learner should be able to:
- Define wave properties including rectilinear propagation, reflection, refraction, diffraction and interference
- Identify examples of wave properties in everyday life
- Relate wave properties to real-life applications such as mirrors, lenses and sound systems

In groups, learners are guided to:
- Brainstorm on what was learnt in Grade 9 about waves
- Use digital devices or reference books to search for the meaning of wave properties
- Copy and complete a table showing wave properties and their applications
- Present findings on properties of waves in a class discussion

How do wave properties affect our daily experiences with light and sound?

- Triumph Physics 10 pg. 139
- Digital devices
- Reference books
- Writing materials

- Oral questions - Observation - Written assignments

Waves and Optics

Properties of Waves - Demonstrating wave properties using a ripple tank
Properties of Waves - Rectilinear propagation of waves

By the end of the lesson, the learner should be able to:
- Identify the parts of a ripple tank and state their functions
- Set up a ripple tank for wave demonstration
- Connect wave patterns observed in a ripple tank to natural phenomena like water waves at the beach
- Explain rectilinear propagation of waves
- Demonstrate rectilinear propagation using a ripple tank
- Connect rectilinear propagation to shadow formation and pinhole cameras

In groups, learners are guided to:
- Observe a ripple tank and its components
- Label key parts of the ripple tank
- Copy and complete a table showing parts and functions of a ripple tank
- Fill the tank with water and test wave generation
- Set up a ripple tank with bar and ball dippers
- Generate straight and circular waves and observe their propagation
- Sketch wave patterns and label direction of travel
- Discuss applications of rectilinear propagation

What role does each part of a ripple tank play in demonstrating wave behaviour?
Why do waves travel in straight lines perpendicular to the wavefront?

- Triumph Physics 10 pg. 141
- Ripple tank with components
- Bar and ball dippers
- Light source
- White screen
- Triumph Physics 10 pg. 143
- Ripple tank
- Bar and ball dippers
- Manila paper
- Markers

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

Waves and Optics

Properties of Waves - Reflection of waves

By the end of the lesson, the learner should be able to:
- State the law of reflection
- Demonstrate reflection of waves using different shaped barriers
- Relate wave reflection to everyday applications like mirrors, periscopes and acoustic design

In groups, learners are guided to:
- Generate plane waves and observe reflection off straight barriers
- Measure and compare angles of incidence and reflection
- Observe reflection patterns using concave and convex barriers
- Sketch wave patterns before and after reflection

How does the shape of a barrier affect the reflection pattern of waves?

- Triumph Physics 10 pg. 144
- Ripple tank
- Metal barriers (straight, concave, convex)
- Ruler
- Manila paper

- Practical assessment - Observation - Oral questions

Waves and Optics

Properties of Waves - Refraction of waves

By the end of the lesson, the learner should be able to:
- Explain refraction as bending of waves due to change in speed
- Demonstrate refraction of waves in a ripple tank
- Connect refraction to how lenses work in eyeglasses, cameras and microscopes

In groups, learners are guided to:
- Place rectangular plastic sheets to create shallow water regions
- Observe how wave speed and direction change at boundaries
- Sketch wave patterns showing refraction
- Discuss why sound travels farther at night than during the day

Why do waves bend when they move from one medium to another?

- Triumph Physics 10 pg. 147
- Ripple tank
- Clear plastic sheets (rectangular and convex)
- Manila paper
- Markers

- Practical assessment - Written assignments - Observation

Waves and Optics

Properties of Waves - Diffraction of waves

By the end of the lesson, the learner should be able to:
- Define diffraction as bending of waves around obstacles or through gaps
- Demonstrate diffraction using a ripple tank
- Relate diffraction to hearing sound around corners and Wi-Fi signal distribution

In groups, learners are guided to:
- Position metal barriers with gaps in the ripple tank
- Observe wave spreading after passing through gaps of different sizes
- Observe diffraction around obstacles and at edges
- Sketch diffraction patterns and discuss applications

How does the size of an opening affect the amount of wave diffraction?

- Triumph Physics 10 pg. 150
- Ripple tank
- Metal barriers with gaps
- Manila paper
- Markers

- Practical assessment - Observation - Oral questions

Waves and Optics

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

By the end of the lesson, the learner should be able to:
- Define diffraction as bending of waves around obstacles or through gaps
- Demonstrate diffraction using a ripple tank
- Relate diffraction to hearing sound around corners and Wi-Fi signal distribution
- Explain constructive and destructive interference
- Demonstrate interference patterns using two spherical dippers
- Connect interference to noise-cancelling headphones and hologram technology

In groups, learners are guided to:
- Position metal barriers with gaps in the ripple tank
- Observe wave spreading after passing through gaps of different sizes
- Observe diffraction around obstacles and at edges
- Sketch diffraction patterns and discuss applications
- Attach two spherical dippers to the vibrator
- Observe alternating bright and dark bands formed
- Sketch wave patterns labelling regions of constructive and destructive interference
- Discuss applications of interference in everyday life

How does the size of an opening affect the amount of wave diffraction?
What causes some regions to have louder sound while others are quieter when two speakers play the same tone?

- Triumph Physics 10 pg. 150
- Ripple tank
- Metal barriers with gaps
- Manila paper
- Markers
- Triumph Physics 10 pg. 152
- Ripple tank
- Two spherical dippers
- Manila paper
- Markers

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

Waves and Optics

Properties of Waves - Formation and properties of stationary waves

By the end of the lesson, the learner should be able to:
- Describe how stationary waves are formed from two progressive waves
- Identify nodes and antinodes in stationary waves
- Connect stationary waves to musical instruments like guitars and violins

In groups, learners are guided to:
- Stretch a rubber band and pluck to observe stationary wave patterns
- Identify regions of highest amplitude (antinodes) and zero amplitude (nodes)
- Vary tension and observe changes in wave pattern
- Discuss properties of stationary waves

How do nodes and antinodes form in a stationary wave?

- Triumph Physics 10 pg. 155
- Rubber bands
- Slinky spring
- Fixed block
- Smooth surface

- Practical assessment - Observation - Oral questions

Waves and Optics

Properties of Waves - Applications of stationary waves in vibrating strings

By the end of the lesson, the learner should be able to:
- Derive expressions for fundamental frequency and overtones in vibrating strings
- Calculate frequencies of harmonics in vibrating strings
- Connect vibrating strings to stringed musical instruments like guitars and pianos

In groups, learners are guided to:
- Set up a string attached to a fixed support and pulley with masses
- Pluck the string and observe stationary wave patterns
- Measure distance between nodes and antinodes
- Calculate fundamental frequency and overtones

How does changing string tension affect the pitch of sound produced?

- Triumph Physics 10 pg. 159
- String (1-2 metres)
- Fixed support
- Pulley and masses
- Ruler

- Written assignments - Practical assessment - Oral questions

Waves and Optics

Properties of Waves - Vibrating air columns in closed and open pipes

By the end of the lesson, the learner should be able to:
- Derive expressions for frequencies in closed and open pipes
- Differentiate between harmonics produced in closed and open pipes
- Connect vibrating air columns to wind instruments like flutes and clarinets

In groups, learners are guided to:
- Blow air across closed and open pipes and listen to sounds produced
- Compare pitch differences between closed and open pipes
- Discuss why closed pipes produce only odd harmonics
- Calculate frequencies of harmonics in pipes

Why do closed pipes produce only odd harmonics while open pipes produce all harmonics?

- Triumph Physics 10 pg. 161
- Closed pipe (boiling tube)
- Open pipe
- Ruler

- Written assignments - Oral questions - Practical assessment

Waves and Optics

Properties of Waves - Vibrating air columns in closed and open pipes
Properties of Waves - Resonance and frequency modulated waves

By the end of the lesson, the learner should be able to:
- Derive expressions for frequencies in closed and open pipes
- Differentiate between harmonics produced in closed and open pipes
- Connect vibrating air columns to wind instruments like flutes and clarinets
- Explain resonance and its conditions
- Describe how FM radio waves carry sound information
- Connect resonance to tuning musical instruments and FM to radio broadcasting

In groups, learners are guided to:
- Blow air across closed and open pipes and listen to sounds produced
- Compare pitch differences between closed and open pipes
- Discuss why closed pipes produce only odd harmonics
- Calculate frequencies of harmonics in pipes
- Set up a glass tube in water with a tuning fork to demonstrate resonance
- Adjust air column length to find resonance point
- Tune an FM radio receiver to different stations
- Research how FM radio waves carry sound information

Why do closed pipes produce only odd harmonics while open pipes produce all harmonics?
How does a radio receiver select and play a specific FM station?

- Triumph Physics 10 pg. 161
- Closed pipe (boiling tube)
- Open pipe
- Ruler
- Triumph Physics 10 pg. 164
- Glass tube
- Tuning fork
- Container with water
- FM radio receiver

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

Waves and Optics

Properties of Waves - Resonance and frequency modulated waves

By the end of the lesson, the learner should be able to:
- Explain resonance and its conditions
- Describe how FM radio waves carry sound information
- Connect resonance to tuning musical instruments and FM to radio broadcasting

In groups, learners are guided to:
- Set up a glass tube in water with a tuning fork to demonstrate resonance
- Adjust air column length to find resonance point
- Tune an FM radio receiver to different stations
- Research how FM radio waves carry sound information

How does a radio receiver select and play a specific FM station?

- Triumph Physics 10 pg. 164
- Glass tube
- Tuning fork
- Container with water
- FM radio receiver

- Oral questions - Written assignments - Observation

Waves and Optics

Properties of Waves - Resonance and frequency modulated waves

By the end of the lesson, the learner should be able to:
- Explain resonance and its conditions
- Describe how FM radio waves carry sound information
- Connect resonance to tuning musical instruments and FM to radio broadcasting

In groups, learners are guided to:
- Set up a glass tube in water with a tuning fork to demonstrate resonance
- Adjust air column length to find resonance point
- Tune an FM radio receiver to different stations
- Research how FM radio waves carry sound information

How does a radio receiver select and play a specific FM station?

- Triumph Physics 10 pg. 164
- Glass tube
- Tuning fork
- Container with water
- FM radio receiver

- Oral questions - Written assignments - Observation

Waves and Optics

Properties of Waves - Doppler effect and applications

By the end of the lesson, the learner should be able to:
- Explain the Doppler effect and its causes
- Describe how frequency changes when source approaches or recedes
- Connect Doppler effect to ambulance sirens, radar speed detection and medical ultrasound

In groups, learners are guided to:
- Watch videos demonstrating Doppler effect with sound waves
- Observe how sound changes as source moves toward or away
- Discuss real-life applications of Doppler effect
- Record observations on frequency and pitch changes

Why does an ambulance siren sound different as it approaches compared to when it moves away?

- Triumph Physics 10 pg. 166
- Digital devices
- Internet access
- Writing materials

- Oral questions - Written assignments - Observation

Waves and Optics
Electricity and Magnetism

Properties of Waves - Doppler effect and applications
Current Electricity - Terminologies used in current electricity

By the end of the lesson, the learner should be able to:
- Explain the Doppler effect and its causes
- Describe how frequency changes when source approaches or recedes
- Connect Doppler effect to ambulance sirens, radar speed detection and medical ultrasound
- Define current, potential difference, resistance and electromotive force
- State SI units for electrical quantities
- Connect electrical terms to household appliances like bulbs, heaters and phone chargers

In groups, learners are guided to:
- Watch videos demonstrating Doppler effect with sound waves
- Observe how sound changes as source moves toward or away
- Discuss real-life applications of Doppler effect
- Record observations on frequency and pitch changes
- Use digital devices or reference books to find meanings of electrical terms
- Discuss current, potential difference, e.m.f. and internal resistance
- Identify symbols and units for electrical quantities
- Share findings on terminology in class discussion

Why does an ambulance siren sound different as it approaches compared to when it moves away?
How is electromotive force different from potential difference in an electrical circuit?

- Triumph Physics 10 pg. 166
- Digital devices
- Internet access
- Writing materials
- Triumph Physics 10 pg. 213
- Digital devices
- Reference books
- Writing materials

- Oral questions - Written assignments - Observation

Electricity and Magnetism

Current Electricity - Relationship between potential difference and current through a conductor

By the end of the lesson, the learner should be able to:
- Investigate the relationship between potential difference and current
- Verify Ohm's Law experimentally
- Connect Ohm's Law to understanding why thicker wires carry more current in house wiring

In groups, learners are guided to:
- Set up circuit with nichrome wire, ammeter, voltmeter and variable resistor
- Adjust voltage and record corresponding current readings
- Plot voltage against current graph
- Determine resistance from gradient of graph

What happens to current when potential difference across a conductor is doubled?

- Triumph Physics 10 pg. 214
- Nichrome wire
- Ammeter
- Voltmeter
- Variable resistor
- Dry cells

- Practical assessment - Written assignments - Observation

Electricity and Magnetism

Current Electricity - Ohm's Law and electrical resistance

By the end of the lesson, the learner should be able to:
- State Ohm's Law and apply V=IR to solve problems
- Calculate resistance, current or voltage using Ohm's Law
- Connect Ohm's Law to selecting appropriate fuses for electrical appliances

In groups, learners are guided to:
- Derive mathematical relationship V=IR from experimental data
- Define the ohm as unit of resistance
- Solve numerical problems using Ohm's Law
- Discuss practical applications of Ohm's Law

Why is it important to know the resistance of a component when designing electrical circuits?

- Triumph Physics 10 pg. 216
- Graph paper
- Calculators
- Exercise books

- Written assignments - Oral questions - Observation

Electricity and Magnetism

Current Electricity - Ohmic and non-ohmic resistors

By the end of the lesson, the learner should be able to:
- Distinguish between ohmic and non-ohmic resistors
- Draw current-voltage graphs for ohmic and non-ohmic conductors
- Connect non-ohmic behaviour to filament bulbs dimming when voltage drops

In groups, learners are guided to:
- Set up circuit with carbon resistor and record current-voltage readings
- Replace with filament bulb and record readings
- Plot I-V graphs for both and compare shapes
- Discuss why filament bulb resistance changes with temperature

Why does a filament bulb's resistance increase as it gets hotter?

- Triumph Physics 10 pg. 217
- Carbon resistor
- Filament bulb
- Ammeter
- Voltmeter
- Dry cells

- Practical assessment - Written assignments - Observation

Electricity and Magnetism

Current Electricity - Effect of length on resistance of conductors
Current Electricity - Effect of cross-sectional area on resistance

By the end of the lesson, the learner should be able to:
- Investigate how length affects resistance of a conductor
- Establish that resistance is directly proportional to length
- Connect length-resistance relationship to why extension cords have higher resistance
- Investigate how cross-sectional area affects resistance
- Establish inverse relationship between area and resistance
- Connect area-resistance relationship to thick cables used in power transmission lines

In groups, learners are guided to:
- Set up circuit with nichrome wire mounted on scale
- Measure resistance for different lengths of wire
- Plot resistance against length graph
- Discuss the direct proportionality between length and resistance
- Set up circuit with nichrome wires of different thicknesses
- Measure resistance for 0.2 mm and 0.4 mm diameter wires
- Compare average resistance values
- Discuss why thicker wires have lower resistance

Why do longer wires have higher resistance than shorter wires of the same material?
Why are thick copper cables used for transmitting electricity over long distances?

- Triumph Physics 10 pg. 219
- Nichrome wire (100 cm)
- Ammeter
- Voltmeter
- Dry cells
- Triumph Physics 10 pg. 221
- Nichrome wires of different diameters
- Ammeter
- Voltmeter
- Dry cells

- Practical assessment - Written assignments - Observation

Electricity and Magnetism

Current Electricity - Effect of cross-sectional area on resistance

By the end of the lesson, the learner should be able to:
- Investigate how cross-sectional area affects resistance
- Establish inverse relationship between area and resistance
- Connect area-resistance relationship to thick cables used in power transmission lines

In groups, learners are guided to:
- Set up circuit with nichrome wires of different thicknesses
- Measure resistance for 0.2 mm and 0.4 mm diameter wires
- Compare average resistance values
- Discuss why thicker wires have lower resistance

Why are thick copper cables used for transmitting electricity over long distances?

- Triumph Physics 10 pg. 221
- Nichrome wires of different diameters
- Ammeter
- Voltmeter
- Dry cells

- Practical assessment - Written assignments - Observation

Electricity and Magnetism

Current Electricity - Effect of material type and temperature on resistance

By the end of the lesson, the learner should be able to:
- Investigate how material type and temperature affect resistance
- Define and use resistivity in calculations
- Connect material properties to why copper is preferred for electrical wiring over nichrome

In groups, learners are guided to:
- Compare resistance of nichrome and copper wires of same dimensions
- Heat nichrome wire and measure resistance change
- Discuss resistivity values of different materials
- Calculate resistance using R = ρl/A

Why does the resistance of metals increase when they are heated?

- Triumph Physics 10 pg. 222
- Nichrome and copper wires
- Hot water
- Ammeter
- Voltmeter

- Practical assessment - Written assignments - Oral questions

Electricity and Magnetism

Current Electricity - Relationship between e.m.f., voltage, current, resistance and internal resistance

By the end of the lesson, the learner should be able to:
- Derive and apply the equation E = I(R + r)
- Calculate internal resistance and terminal voltage
- Connect internal resistance to why car batteries struggle to start engines in cold weather

In groups, learners are guided to:
- Set up circuit with cell, ammeter, voltmeter and variable resistor
- Record voltage and current for different resistance values
- Plot V against I graph and determine e.m.f. and internal resistance
- Solve problems using E = I(R + r)

Why is the terminal voltage of a battery always less than its e.m.f. when current flows?

- Triumph Physics 10 pg. 225
- Dry cell
- Ammeter
- Voltmeter
- Variable resistor

- Practical assessment - Written assignments - Observation

Electricity and Magnetism

Current Electricity - Types of resistors and resistor networks
Current Electricity - Measurement of resistance using resistor colour codes

By the end of the lesson, the learner should be able to:
- Identify fixed and variable resistors and state their uses
- Draw symbols for different types of resistors
- Connect resistor types to volume controls in radios and dimmer switches in homes
- Read resistance values from colour coded resistors
- Calculate resistance and tolerance from colour bands
- Connect colour coding to identifying resistor values when repairing electronic devices

In groups, learners are guided to:
- Identify fixed resistors (carbon) and variable resistors (rheostat, potentiometer, thermistor)
- Draw circuit symbols for each resistor type
- Discuss uses of each type of resistor
- Complete table showing resistor types, symbols and uses
- Study resistor colour code chart
- Observe colour bands on fixed carbon resistors
- Calculate resistance values using colour codes
- Verify calculated values using digital multimeter

How do variable resistors help control the brightness of lights and volume of sound?
How do the colour bands on a resistor indicate its resistance value and tolerance?

- Triumph Physics 10 pg. 227
- Various resistors
- Circuit symbol charts
- Exercise books
- Triumph Physics 10 pg. 228
- Fixed carbon resistors
- Colour code chart
- Digital multimeter

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

Electricity and Magnetism

Current Electricity - Measurement of resistance using resistor colour codes

By the end of the lesson, the learner should be able to:
- Read resistance values from colour coded resistors
- Calculate resistance and tolerance from colour bands
- Connect colour coding to identifying resistor values when repairing electronic devices

In groups, learners are guided to:
- Study resistor colour code chart
- Observe colour bands on fixed carbon resistors
- Calculate resistance values using colour codes
- Verify calculated values using digital multimeter

How do the colour bands on a resistor indicate its resistance value and tolerance?

- Triumph Physics 10 pg. 228
- Fixed carbon resistors
- Colour code chart
- Digital multimeter

- Practical assessment - Written assignments - Observation

Electricity and Magnetism

Current Electricity - Measurement of resistance using ammeter-voltmeter and Wheatstone bridge

By the end of the lesson, the learner should be able to:
- Measure resistance using ammeter-voltmeter method
- Explain the working principle of Wheatstone bridge
- Connect Wheatstone bridge to precision measurements in laboratory instruments

In groups, learners are guided to:
- Set up circuit to measure resistance using ammeter-voltmeter method
- Calculate resistance using R = V/I
- Set up Wheatstone bridge and balance it for zero deflection
- Calculate unknown resistance using bridge formula

Why is the Wheatstone bridge more accurate than the ammeter-voltmeter method?

- Triumph Physics 10 pg. 231
- Ammeter
- Voltmeter
- Wheatstone bridge
- Galvanometer

- Practical assessment - Written assignments - Observation

Electricity and Magnetism

Current Electricity - Measurement of resistance using metre bridge

By the end of the lesson, the learner should be able to:
- Describe the metre bridge as a practical form of Wheatstone bridge
- Use metre bridge to determine unknown resistance
- Connect metre bridge principle to strain gauges used in weighing scales

In groups, learners are guided to:
- Set up metre bridge circuit with known and unknown resistors
- Slide jockey along wire until galvanometer shows zero deflection
- Record balance lengths and calculate unknown resistance
- Compare calculated values with standard values

How does the metre bridge use the principle of balanced ratios to measure resistance?

- Triumph Physics 10 pg. 233
- Metre bridge
- Known resistor
- Unknown resistor
- Galvanometer

- Practical assessment - Written assignments - Observation

Electricity and Magnetism

Current Electricity - Measurement of resistance using metre bridge

By the end of the lesson, the learner should be able to:
- Describe the metre bridge as a practical form of Wheatstone bridge
- Use metre bridge to determine unknown resistance
- Connect metre bridge principle to strain gauges used in weighing scales

In groups, learners are guided to:
- Set up metre bridge circuit with known and unknown resistors
- Slide jockey along wire until galvanometer shows zero deflection
- Record balance lengths and calculate unknown resistance
- Compare calculated values with standard values

How does the metre bridge use the principle of balanced ratios to measure resistance?

- Triumph Physics 10 pg. 233
- Metre bridge
- Known resistor
- Unknown resistor
- Galvanometer

- Practical assessment - Written assignments - Observation

Electricity and Magnetism

Current Electricity - Measurement of resistance using metre bridge

By the end of the lesson, the learner should be able to:
- Describe the metre bridge as a practical form of Wheatstone bridge
- Use metre bridge to determine unknown resistance
- Connect metre bridge principle to strain gauges used in weighing scales

In groups, learners are guided to:
- Set up metre bridge circuit with known and unknown resistors
- Slide jockey along wire until galvanometer shows zero deflection
- Record balance lengths and calculate unknown resistance
- Compare calculated values with standard values

How does the metre bridge use the principle of balanced ratios to measure resistance?

- Triumph Physics 10 pg. 233
- Metre bridge
- Known resistor
- Unknown resistor
- Galvanometer

- Practical assessment - Written assignments - Observation

Electricity and Magnetism

Current Electricity - Effective resistance of resistors in series

By the end of the lesson, the learner should be able to:
- Derive formula for effective resistance of resistors in series
- Calculate total resistance and voltage drops in series circuits
- Connect series circuits to Christmas lights where one faulty bulb affects all others

In groups, learners are guided to:
- Connect resistors in series with ammeter and voltmeters
- Measure total voltage and individual voltage drops
- Verify that R_total = R₁ + R₂ + R₃
- Solve numerical problems on series resistor networks

Why does adding more resistors in series increase the total resistance of a circuit?

- Triumph Physics 10 pg. 234
- Resistors
- Ammeter
- Voltmeters
- Dry cells

- Practical assessment - Written assignments - Observation

Electricity and Magnetism

Current Electricity - Effective resistance of resistors in parallel

By the end of the lesson, the learner should be able to:
- Derive formula for effective resistance of resistors in parallel
- Calculate total resistance and branch currents in parallel circuits
- Connect parallel circuits to house wiring where each appliance operates independently

In groups, learners are guided to:
- Connect resistors in parallel with ammeter and voltmeters
- Measure total current and individual branch currents
- Verify that 1/R_total = 1/R₁ + 1/R₂ + 1/R₃
- Solve numerical problems on parallel resistor networks

Why is the total resistance of parallel resistors always less than the smallest individual resistor?

- Triumph Physics 10 pg. 237
- Resistors
- Ammeter
- Voltmeters
- Dry cells

- Practical assessment - Written assignments - Observation

Electricity and Magnetism

Current Electricity - Effective resistance of resistors in parallel

By the end of the lesson, the learner should be able to:
- Derive formula for effective resistance of resistors in parallel
- Calculate total resistance and branch currents in parallel circuits
- Connect parallel circuits to house wiring where each appliance operates independently

In groups, learners are guided to:
- Connect resistors in parallel with ammeter and voltmeters
- Measure total current and individual branch currents
- Verify that 1/R_total = 1/R₁ + 1/R₂ + 1/R₃
- Solve numerical problems on parallel resistor networks

Why is the total resistance of parallel resistors always less than the smallest individual resistor?

- Triumph Physics 10 pg. 237
- Resistors
- Ammeter
- Voltmeters
- Dry cells

- Practical assessment - Written assignments - Observation

Electricity and Magnetism

Current Electricity - Relationship between voltage, current and power in heating effect

By the end of the lesson, the learner should be able to:
- Derive and apply P = VI, P = I²R and H = I²Rt
- Calculate electrical power and energy consumed
- Connect heating effect to electric kettles, heaters and toasters in homes

In groups, learners are guided to:
- Set up circuit with resistor, ammeter and voltmeter
- Record voltage and current at different settings
- Calculate power using P = VI
- Derive Joule's law of electrical heating H = I²Rt

How does the resistance of a heating element affect the amount of heat produced?

- Triumph Physics 10 pg. 241
- Resistor
- Ammeter
- Voltmeter
- Rheostat

- Written assignments - Oral questions - Observation

Electricity and Magnetism

Current Electricity - Relationship between voltage, current and power in heating effect

By the end of the lesson, the learner should be able to:
- Derive and apply P = VI, P = I²R and H = I²Rt
- Calculate electrical power and energy consumed
- Connect heating effect to electric kettles, heaters and toasters in homes

In groups, learners are guided to:
- Set up circuit with resistor, ammeter and voltmeter
- Record voltage and current at different settings
- Calculate power using P = VI
- Derive Joule's law of electrical heating H = I²Rt

How does the resistance of a heating element affect the amount of heat produced?

- Triumph Physics 10 pg. 241
- Resistor
- Ammeter
- Voltmeter
- Rheostat

- Written assignments - Oral questions - Observation

Electricity and Magnetism

Current Electricity - Applications of the heating effect of electric current

By the end of the lesson, the learner should be able to:
- Describe applications of electrical heating in various devices
- Explain the role of fuses in circuit protection
- Connect heating applications to cooking appliances, lighting and industrial furnaces

In groups, learners are guided to:
- Research applications of heating effect in cooking appliances, lighting and circuit protection
- Discuss how fuses and circuit breakers protect circuits
- Compare ohmic devices (heaters) and non-ohmic devices (filament bulbs)
- Present findings on applications to class

How do fuses use the heating effect of current to protect electrical circuits?

- Triumph Physics 10 pg. 245
- Digital devices
- Reference books
- Various electrical appliances

- Written assignments - Oral questions - Observation

Electricity and Magnetism

Current Electricity - Applications of the heating effect of electric current

By the end of the lesson, the learner should be able to:
- Describe applications of electrical heating in various devices
- Explain the role of fuses in circuit protection
- Connect heating applications to cooking appliances, lighting and industrial furnaces

In groups, learners are guided to:
- Research applications of heating effect in cooking appliances, lighting and circuit protection
- Discuss how fuses and circuit breakers protect circuits
- Compare ohmic devices (heaters) and non-ohmic devices (filament bulbs)
- Present findings on applications to class

How do fuses use the heating effect of current to protect electrical circuits?

- Triumph Physics 10 pg. 245
- Digital devices
- Reference books
- Various electrical appliances

- Written assignments - Oral questions - Observation

Electricity and Magnetism

Introduction to Electronics - Meaning of insulators, conductors, semiconductors and superconductors

By the end of the lesson, the learner should be able to:
- Define conductors, insulators, semiconductors and superconductors
- Classify materials based on their electrical conductivity
- Connect material classification to selection of wires and insulation in electrical installations

In groups, learners are guided to:
- Set up simple circuit to test conductivity of different materials
- Classify materials as conductors, insulators or semiconductors
- Research meaning of superconductors
- Discuss examples and applications of each material type

What determines whether a material is a good conductor or insulator of electricity?

- Triumph Physics 10 pg. 248
- Simple circuit
- Various materials (copper, iron, wood, plastic, silicon)
- Bulb

- Practical assessment - Oral questions - Observation

Electricity and Magnetism

Introduction to Electronics - Distinguishing materials using energy band theory

By the end of the lesson, the learner should be able to:
- Explain energy band theory and band gaps
- Draw energy band diagrams for conductors, semiconductors and insulators
- Connect band gaps to why LEDs emit light of specific colours

In groups, learners are guided to:
- Draw rectangles showing valence and conduction bands for conductors
- Draw band diagrams for semiconductors with small band gap
- Draw band diagrams for insulators with large band gap
- Compare and classify materials based on band structure

How does the size of the energy gap determine whether a material conducts electricity?

- Triumph Physics 10 pg. 250
- Manila paper
- Coloured pencils
- Markers

- Written assignments - Oral questions - Observation

Electricity and Magnetism

Introduction to Electronics - Electrical behaviour of conductors with varying temperatures

By the end of the lesson, the learner should be able to:
- Investigate how temperature affects resistance of conductors
- Explain why conductor resistance increases with temperature
- Connect temperature effect to why power lines sag more on hot days

In groups, learners are guided to:
- Set up circuit with copper wire, ammeter and voltmeter
- Measure resistance at room temperature
- Heat copper wire and measure new resistance
- Cool wire with ice and compare resistance values

Why does the resistance of copper wire increase when it is heated?

- Triumph Physics 10 pg. 253
- Copper wire
- Ammeter
- Voltmeter
- Hot water
- Ice cubes

- Practical assessment - Written assignments - Observation

Electricity and Magnetism

Introduction to Electronics - Electrical behaviour of insulators with varying temperatures
Introduction to Electronics - Electrical behaviour of semiconductors with varying temperatures

By the end of the lesson, the learner should be able to:
- Investigate how temperature affects conductivity of insulators
- Explain why insulators maintain high resistance regardless of temperature
- Connect insulator behaviour to safety of rubber gloves used by electricians
- Investigate how temperature affects resistance of semiconductors
- Explain why semiconductor resistance decreases with temperature
- Connect semiconductor behaviour to thermistors used in temperature sensors and fire alarms

In groups, learners are guided to:
- Set up circuit with glass rod and light bulb
- Test conductivity at room temperature
- Heat glass rod and retest conductivity
- Cool glass rod and observe any changes in conductivity
- Set up circuit with thermistor, ammeter and voltmeter
- Measure resistance at room temperature
- Heat thermistor in hot water and measure resistance
- Cool thermistor in ice water and compare values

Why do insulators like glass and rubber not conduct electricity even when heated?
Why does the resistance of a thermistor decrease when temperature increases?

- Triumph Physics 10 pg. 254
- Glass rod
- Light bulb
- Dry cells
- Hot water
- Ice cubes
- Triumph Physics 10 pg. 255
- Thermistor
- Ammeter
- Voltmeter
- Hot water
- Ice cubes

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

Electricity and Magnetism

Introduction to Electronics - Intrinsic semiconductors

By the end of the lesson, the learner should be able to:
- Define intrinsic semiconductors and give examples
- Explain conduction in pure silicon and germanium
- Connect intrinsic semiconductors to the base material used in manufacturing computer chips

In groups, learners are guided to:
- Read presentation on intrinsic and extrinsic semiconductors
- Discuss meaning of intrinsic semiconductors
- Explain equal numbers of electrons and holes in pure semiconductors
- Discuss limited conductivity at room temperature

Why do intrinsic semiconductors have low conductivity at room temperature?

- Triumph Physics 10 pg. 257
- Digital devices
- Reference books
- Writing materials

- Oral questions - Written assignments - Observation

Electricity and Magnetism

Introduction to Electronics - Extrinsic semiconductors

By the end of the lesson, the learner should be able to:
- Define extrinsic semiconductors and explain doping process
- Differentiate between intrinsic and extrinsic semiconductors
- Connect extrinsic semiconductors to improved performance of electronic components

In groups, learners are guided to:
- Discuss the meaning of extrinsic semiconductors
- Explain how doping improves conductivity
- Identify group III and group V elements used as dopants
- Compare conductivity of intrinsic and extrinsic semiconductors

How does adding impurities to pure semiconductors improve their electrical conductivity?

- Triumph Physics 10 pg. 258
- Periodic table
- Reference books
- Writing materials

- Oral questions - Written assignments - Observation

Electricity and Magnetism

Introduction to Electronics - Formation of n-type semiconductors

By the end of the lesson, the learner should be able to:
- Explain formation of n-type semiconductors through doping
- Draw diagrams showing electron distribution in n-type materials
- Connect n-type semiconductors to one half of diodes and transistors used in phones

In groups, learners are guided to:
- Research formation of n-type semiconductors
- Discuss addition of group V elements (phosphorus, arsenic)
- Draw silicon lattice doped with phosphorus showing free electron
- Identify electrons as majority charge carriers

Why are group V elements used to create n-type semiconductors?

- Triumph Physics 10 pg. 259
- Digital devices
- Manila paper
- Coloured pencils

- Written assignments - Oral questions - Observation

Electricity and Magnetism

Introduction to Electronics - Formation of n-type semiconductors
Introduction to Electronics - Formation of p-type semiconductors

By the end of the lesson, the learner should be able to:
- Explain formation of n-type semiconductors through doping
- Draw diagrams showing electron distribution in n-type materials
- Connect n-type semiconductors to one half of diodes and transistors used in phones
- Explain formation of p-type semiconductors through doping
- Draw diagrams showing hole distribution in p-type materials
- Connect p-type semiconductors to the other half of diodes and transistors

In groups, learners are guided to:
- Research formation of n-type semiconductors
- Discuss addition of group V elements (phosphorus, arsenic)
- Draw silicon lattice doped with phosphorus showing free electron
- Identify electrons as majority charge carriers
- Research formation of p-type semiconductors
- Discuss addition of group III elements (boron, gallium)
- Draw germanium lattice doped with boron showing holes
- Identify holes as majority charge carriers

Why are group V elements used to create n-type semiconductors?
Why are group III elements used to create p-type semiconductors?

- Triumph Physics 10 pg. 259
- Digital devices
- Manila paper
- Coloured pencils
- Triumph Physics 10 pg. 260
- Digital devices
- Manila paper
- Coloured pencils

- Written assignments - Oral questions - Observation

Electricity and Magnetism

Introduction to Electronics - Applications of conductors, semiconductors, insulators and superconductors

By the end of the lesson, the learner should be able to:
- Describe applications of different material types in electronics
- Explain role of semiconductors in diodes, transistors and integrated circuits
- Connect material applications to everyday devices like phones, computers and MRI machines

In groups, learners are guided to:
- Research applications of conductors, semiconductors, insulators and superconductors
- Discuss applications in electrical wiring, electronics, circuit protection and medical imaging
- Complete table showing materials, types and applications
- Present findings on applications to class

How do semiconductors enable the functioning of modern electronic devices?

- Triumph Physics 10 pg. 261
- Digital devices
- Reference books
- Manila paper

- Written assignments - Oral questions - Observation

Electricity and Magnetism

Introduction to Electronics - Applications of conductors, semiconductors, insulators and superconductors

By the end of the lesson, the learner should be able to:
- Describe applications of different material types in electronics
- Explain role of semiconductors in diodes, transistors and integrated circuits
- Connect material applications to everyday devices like phones, computers and MRI machines

In groups, learners are guided to:
- Research applications of conductors, semiconductors, insulators and superconductors
- Discuss applications in electrical wiring, electronics, circuit protection and medical imaging
- Complete table showing materials, types and applications
- Present findings on applications to class

How do semiconductors enable the functioning of modern electronic devices?

- Triumph Physics 10 pg. 261
- Digital devices
- Reference books
- Manila paper

- Written assignments - Oral questions - Observation