Fundamentals of Electricity

Introduction to Electricity - Importance of electricity in society

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

- Define electricity and describe its role as a form of energy
- Identify uses of electricity at home, school, hospitals and factories
- Relate electricity to real-life applications such as lighting, communication and powering medical equipment

- Discuss the meaning of electricity and its sources of energy
- Use digital or print media to search for uses of electricity in daily life
- Categorise uses of electricity under communication, comfort, entertainment and education
- Present findings to the class

How does electricity improve the quality of life in homes, schools and hospitals?

- Distinction Electricity Grade 10 pg. 1
- Digital devices
- Internet access
- Reference books

- Oral questions - Observation - Written assignments

Fundamentals of Electricity

Introduction to Electricity - Importance of electricity in society
Introduction to Electricity - Career opportunities in electrical technology

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

- Discuss the importance of electricity in economic and industrial development
- Identify electrical items found in local markets and the community
- Connect electricity use to national development and Kenya Vision 2030

- Identify career opportunities available in the field of electrical technology
- Describe the roles of various electrical professionals such as electricians, power engineers and electronics technicians
- Connect career choices in electricity to real-life roles like repairing electrical faults, designing robots and installing solar panels

- List electrical items found at school, home and local markets
- Discuss uses of electricity in homes, schools, hospitals and factories
- Use the internet to search on electricity's role in economic development
- Share findings with peers

- Brainstorm and discuss career opportunities in electrical technology
- Study a chart showing careers in the electrical field and discuss each
- Create flashcards for different careers in electricity
- Present findings to the class for feedback

In what ways does electricity drive economic and industrial development in Kenya?
What career opportunities are available in the field of electrical technology and how do they contribute to society?

- Distinction Electricity Grade 10 pg. 1
- Digital devices
- Internet access
- Career brochures
- Distinction Electricity Grade 10 pg. 4
- Digital devices
- Career brochures
- Internet access
- Resource person

- Oral questions - Observation - Portfolio

Fundamentals of Electricity

Introduction to Electricity - Safety regulations in electrical tasks

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

- Define safety and explain the need for safety regulations in electrical tasks
- Identify common tool storage facilities used in an electrical workshop
- Connect proper tool storage to accident prevention in real-life workshop environments

- Discuss best dressing practices and safety tools used in the workshop
- Study images of tool storage facilities including tool kit, tool rack, tool box and tool cabinet
- Discuss factors considered when choosing a tool storage facility
- Share findings with peers

Why is proper storage of tools important in maintaining safety in an electrical workshop?

- Distinction Electricity Grade 10 pg. 7
- Digital devices
- Assorted electrical PPEs
- Internet access

- Oral questions - Observation - Written assignments

Fundamentals of Electricity

Introduction to Electricity - Safety regulations in electrical tasks

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

- Describe safety precautions to be observed when carrying out electrical tasks
- Identify and explain the use of personal protective equipment (PPE) in electrical work
- Connect correct use of PPE to preventing injuries and accidents in real-life electrical workplaces

- Discuss the use of safety equipment including gloves, helmets, goggles and face shields
- Role play the demonstration of safety regulations while carrying out electrical tasks
- Discuss safety precautions such as avoiding overloaded sockets, checking damaged wires and proper earthing
- Share findings with peers

How does the use of personal protective equipment reduce the risk of injury during electrical tasks?

- Distinction Electricity Grade 10 pg. 8
- Assorted electrical PPEs
- First aid kit
- Internet access

- Observation - Oral questions - Written tests

Fundamentals of Electricity

Introduction to Electricity - Roles of stakeholders in electrical safety

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

- Describe the roles and responsibilities of workers, employers and government agencies in electrical safety
- Explain how stakeholders collaborate to create a safe electrical work environment
- Connect stakeholder responsibilities to real-life scenarios such as workplace inspections and safety training programmes

- Discuss the roles of workers, employers and government agencies in electrical safety
- Fill in a table with roles and responsibilities of each stakeholder
- Use print or digital media to search for information on electrical safety regulations
- Present findings to the class

What are the distinct roles of workers, employers and government agencies in ensuring electrical safety in the workplace?

- Distinction Electricity Grade 10 pg. 9
- Digital devices
- Internet access
- Reference books

- Oral questions - Observation - Written tests

Fundamentals of Electricity

Introduction to Electricity - Embracing electrical technology as a career
D.C Electric Circuits - Properties of an electric circuit

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

- Explain how electricity is applied across various sectors including transport, health and communication
- Discuss the importance of pursuing a career in electrical technology for national development
- Connect personal interests and aptitudes to career opportunities in the electrical technology field

- Define an electric circuit and describe its essential components
- Identify the functions of the power source, conductors, bulb and switch in a simple circuit
- Connect the components of a simple electric circuit to real-life applications such as torch lights and home lighting systems

- Brainstorm and discuss career opportunities in electrical technology including electrical engineer, electrician, solar technician and power plant operator
- Visit or virtually explore a local electrical workplace to observe career opportunities
- Discuss how electrical careers contribute to national development
- Share findings with peers

- Use digital or print media to search for information on the parts and properties of an electric circuit
- Assemble a simple circuit using a dry cell, bulb, wires and switch
- Observe and discuss what happens when the switch is turned on and off
- Fill in a table with components and their functions

How does embracing a career in electrical technology contribute to personal growth and national development?
How does each component of an electric circuit contribute to the flow of electric current?

- Distinction Electricity Grade 10 pg. 11
- Digital devices
- Internet access
- Resource person

- Distinction Electricity Grade 10 pg. 13
- Dry cells
- Connecting wires
- Assorted bulbs
- Switches

- Oral questions - Observation - Portfolio
- Observation - Oral questions - Written assignments

Fundamentals of Electricity

D.C Electric Circuits - Properties of an electric circuit

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

- Perform zeroing on measuring instruments including ammeter, voltmeter and ohmmeter
- Explain the purpose of zeroing and its importance in accurate measurement
- Connect accurate instrument readings to reliable electrical fault detection in real-life scenarios

- Perform zeroing on the ammeter by setting to the lowest range and adjusting the zero screw
- Perform zeroing on the voltmeter by aligning the pointer to the zero mark
- Perform zeroing on the ohmmeter by touching probes together and adjusting the knob
- Record and discuss observations with peers

Why is zeroing of measuring instruments important before taking electrical measurements?

- Distinction Electricity Grade 10 pg. 15
- Ammeter
- Voltmeter
- Ohmmeter
- Connecting wires

- Observation - Practical tasks - Oral questions

Fundamentals of Electricity

D.C Electric Circuits - DC circuit analysis (Ohm's Law)

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

- Define voltage, current and resistance and describe their relationship
- State Ohm's Law and apply it to solve problems in simple DC circuits
- Connect Ohm's Law to real-life applications such as selecting correct resistors for household appliances

- Search online or in print media for information on voltage, current, resistance and Ohm's Law
- Perform an experiment to investigate the relationship between voltage and current in a resistive DC circuit
- Plot a graph of voltage against current and determine resistance from the slope
- Discuss findings with peers

What is the relationship between voltage, current and resistance in a DC circuit?

- Distinction Electricity Grade 10 pg. 17
- Cells
- Resistors
- Ammeter
- Voltmeter
- Connecting wires

- Practical tasks - Observation - Written tests

Fundamentals of Electricity

D.C Electric Circuits - DC circuit analysis (Kirchhoff's Laws)

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

- State Kirchhoff's Voltage Law (KVL) and Kirchhoff's Current Law (KCL)
- Apply KVL and KCL to analyse series and parallel DC circuits
- Connect Kirchhoff's Laws to real-life scenarios such as troubleshooting electrical faults in vehicle wiring

- Construct a series circuit and measure voltage drops across each resistor to verify KVL
- Construct a parallel circuit and measure branch currents to verify KCL
- Solve worked examples on Kirchhoff's Laws
- Share and discuss findings with peers

How are Kirchhoff's Laws applied to analyse complex DC circuits in electrical systems?

- Distinction Electricity Grade 10 pg. 19
- Cells
- Resistors
- Ammeter
- Voltmeter
- Connecting wires

- Practical tasks - Observation - Written tests

Fundamentals of Electricity

D.C Electric Circuits - DC circuit analysis (Kirchhoff's Laws)

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

- State Kirchhoff's Voltage Law (KVL) and Kirchhoff's Current Law (KCL)
- Apply KVL and KCL to analyse series and parallel DC circuits
- Connect Kirchhoff's Laws to real-life scenarios such as troubleshooting electrical faults in vehicle wiring

- Construct a series circuit and measure voltage drops across each resistor to verify KVL
- Construct a parallel circuit and measure branch currents to verify KCL
- Solve worked examples on Kirchhoff's Laws
- Share and discuss findings with peers

How are Kirchhoff's Laws applied to analyse complex DC circuits in electrical systems?

- Distinction Electricity Grade 10 pg. 19
- Cells
- Resistors
- Ammeter
- Voltmeter
- Connecting wires

- Practical tasks - Observation - Written tests

Fundamentals of Electricity

D.C Electric Circuits - Constructing resistor networks (Series)

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

- Describe the properties of a series resistor network in a DC circuit
- Construct a series resistor network and measure voltage and current at various points
- Connect series resistor networks to real-life applications such as series-wired Christmas lights and string lighting systems

- Discuss the arrangement of resistors in series and their current-voltage relationship
- Construct a series resistor circuit using three resistors, ammeter, voltmeter and battery
- Record and compare ammeter and voltmeter readings across individual resistors and the whole circuit
- Share findings with peers

How does connecting resistors in series affect the total resistance and current in a DC circuit?

- Distinction Electricity Grade 10 pg. 21
- Cells
- Assorted resistors
- Ammeter
- Voltmeter
- Connecting wires

- Practical tasks - Observation - Written assignments

Fundamentals of Electricity

D.C Electric Circuits - Constructing resistor networks (Series)

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

- Describe the properties of a series resistor network in a DC circuit
- Construct a series resistor network and measure voltage and current at various points
- Connect series resistor networks to real-life applications such as series-wired Christmas lights and string lighting systems

- Discuss the arrangement of resistors in series and their current-voltage relationship
- Construct a series resistor circuit using three resistors, ammeter, voltmeter and battery
- Record and compare ammeter and voltmeter readings across individual resistors and the whole circuit
- Share findings with peers

How does connecting resistors in series affect the total resistance and current in a DC circuit?

- Distinction Electricity Grade 10 pg. 21
- Cells
- Assorted resistors
- Ammeter
- Voltmeter
- Connecting wires

- Practical tasks - Observation - Written assignments

Fundamentals of Electricity

D.C Electric Circuits - Constructing resistor networks (Parallel)

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

- Describe the properties of a parallel resistor network in a DC circuit
- Construct a parallel resistor network and measure voltage and current in each branch
- Connect parallel resistor networks to real-life applications such as household electrical wiring where appliances operate independently

- Discuss the arrangement of resistors in parallel and their current-voltage relationship
- Construct a parallel resistor circuit using three resistors, ammeter, voltmeter and battery
- Record and compare readings across individual branches and the total circuit
- Share findings with peers

Why are household electrical appliances connected in parallel rather than in series?

- Distinction Electricity Grade 10 pg. 22
- Cells
- Assorted resistors
- Ammeter
- Voltmeter
- Connecting wires

- Practical tasks - Observation - Written tests

Fundamentals of Electricity

D.C Electric Circuits - Constructing resistor networks (Series-Parallel)

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

- Describe the properties of a series-parallel resistor network
- Construct a series-parallel resistor network and calculate effective resistance
- Connect series-parallel circuits to real-life applications such as car electrical systems that combine both configurations

- Discuss the arrangement and properties of series-parallel resistor networks
- Construct a series-parallel circuit and record voltage and current readings
- Solve worked examples to calculate effective resistance in series-parallel networks
- Share findings with peers

How is effective resistance calculated in a series-parallel resistor network?

- Distinction Electricity Grade 10 pg. 23
- Cells
- Assorted resistors
- Ammeter
- Voltmeter
- Connecting wires

- Practical tasks - Observation - Written assignments

Fundamentals of Electricity

D.C Electric Circuits - Conductors, insulators and semiconductors

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

- Differentiate between conductors, insulators and semiconductors based on their electrical properties
- Conduct an experiment to investigate electrical conduction in metallic and non-metallic materials
- Connect knowledge of conductors and insulators to real-life applications such as electrical cable insulation and circuit board design

- Use digital or print media to search for information on conductors, insulators and semiconductors
- Set up a circuit to test whether various materials (aluminium foil, rubber, paper, pencil lead, spoon) conduct electricity
- Observe and record results then classify materials as conductors, insulators or semiconductors
- Share findings with peers

How does the atomic structure of a material determine whether it is a conductor, insulator or semiconductor?

- Distinction Electricity Grade 10 pg. 25
- Cells
- Bulbs
- Connecting wires
- Aluminium foil, rubber, paper, pencil lead, spoon

- Practical tasks - Observation - Written tests

Fundamentals of Electricity

D.C Electric Circuits - Conductors, insulators and semiconductors

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

- Differentiate between conductors, insulators and semiconductors based on their electrical properties
- Conduct an experiment to investigate electrical conduction in metallic and non-metallic materials
- Connect knowledge of conductors and insulators to real-life applications such as electrical cable insulation and circuit board design

- Use digital or print media to search for information on conductors, insulators and semiconductors
- Set up a circuit to test whether various materials (aluminium foil, rubber, paper, pencil lead, spoon) conduct electricity
- Observe and record results then classify materials as conductors, insulators or semiconductors
- Share findings with peers

How does the atomic structure of a material determine whether it is a conductor, insulator or semiconductor?

- Distinction Electricity Grade 10 pg. 25
- Cells
- Bulbs
- Connecting wires
- Aluminium foil, rubber, paper, pencil lead, spoon

- Practical tasks - Observation - Written tests

Fundamentals of Electricity

D.C Electric Circuits - Mechanism of conduction in metals

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

- Explain the mechanism of electrical conduction in metals using the free electron model
- Describe how an applied electric field causes electrons to drift and produce current
- Connect the mechanism of conduction in metals to real-life applications such as copper wiring in buildings and aluminium conductors in power lines

- Use digital or print media to search for information on why metals conduct electricity
- Demonstrate conduction using a plastic tube filled with marbles or ball bearings to simulate electron movement
- Discuss how delocalised electrons in metals move under an electric field to produce current
- Share findings with peers

Why do metals conduct electricity more efficiently than non-metals?

- Distinction Electricity Grade 10 pg. 27
- Plastic tube and marbles
- Digital devices
- Reference books
- Internet access

- Oral questions - Observation - Written assignments

Fundamentals of Electricity

D.C Electric Circuits - Calculating power and energy in DC circuits

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

- Define power and energy in the context of DC circuits and state their units
- Apply the formulae P=VI and W=VIt to calculate power and energy in DC circuits
- Connect energy calculations to real-life scenarios such as estimating electricity bills for household appliances

- Use digital or print media to search for formulae for calculating power and energy in DC circuits
- Set up a simple circuit with a resistor, ammeter and voltmeter to measure voltage and current
- Calculate power and energy consumed using P=VI and W=VIt
- Solve worked examples involving power and energy calculations

How are power and energy calculations used to manage electricity consumption in homes and industries?

- Distinction Electricity Grade 10 pg. 26
- Cells
- Resistors
- Ammeter
- Voltmeter
- Stopwatch

- Practical tasks - Observation - Written tests

Fundamentals of Electricity

D.C Electric Circuits - Calculating power and energy in DC circuits

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

- Convert energy units between joules and kilowatt-hours
- Solve multi-step problems involving power, energy and time in DC circuits
- Connect kilowatt-hour calculations to real-life scenarios such as reading electricity meters and understanding monthly power bills

- Review the relationship between watts, kilowatts, joules and kilowatt-hours
- Solve worked examples converting energy from joules to kWh and vice versa
- Calculate the cost of running specific household appliances given a tariff rate
- Discuss findings with peers

How is the kilowatt-hour unit used in calculating the cost of electrical energy consumed in a household?

- Distinction Electricity Grade 10 pg. 26
- Digital devices
- Reference books
- Internet access

- Written tests - Oral questions - Written assignments

Fundamentals of Electricity

D.C Electric Circuits - Calculating power and energy in DC circuits

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

- Convert energy units between joules and kilowatt-hours
- Solve multi-step problems involving power, energy and time in DC circuits
- Connect kilowatt-hour calculations to real-life scenarios such as reading electricity meters and understanding monthly power bills

- Review the relationship between watts, kilowatts, joules and kilowatt-hours
- Solve worked examples converting energy from joules to kWh and vice versa
- Calculate the cost of running specific household appliances given a tariff rate
- Discuss findings with peers

How is the kilowatt-hour unit used in calculating the cost of electrical energy consumed in a household?

- Distinction Electricity Grade 10 pg. 26
- Digital devices
- Reference books
- Internet access

- Written tests - Oral questions - Written assignments

Fundamentals of Electricity

D.C Electric Circuits - Tracing faults in DC circuits

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

- Identify common faults in DC circuits including open circuit, short circuit, dry joints and loose terminals
- Use measuring instruments to trace and identify faults in DC circuits
- Connect fault tracing skills to real-life applications such as diagnosing faults in car electrical systems and home appliances

- Use an ammeter, voltmeter and ohmmeter to trace faults in a DC circuit
- Identify open circuit, short circuit, dry joints and loose terminals in a circuit setup
- Discuss and record observations on how each fault affects circuit behaviour
- Share findings with peers

How are measuring instruments used to identify and trace faults in DC circuits?

- Distinction Electricity Grade 10 pg. 13
- Ammeter
- Voltmeter
- Ohmmeter
- Assorted resistors
- Connecting wires

- Practical tasks - Observation - Written tests

Fundamentals of Electricity

D.C Electric Circuits - Tracing faults in DC circuits
D.C Electric Circuits - Applications of DC circuits

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

- Identify common faults in DC circuits including open circuit, short circuit, dry joints and loose terminals
- Use measuring instruments to trace and identify faults in DC circuits
- Connect fault tracing skills to real-life applications such as diagnosing faults in car electrical systems and home appliances

- Identify practical applications of DC circuits in daily life
- Describe how DC circuits are used in home automation and car safety systems
- Connect DC circuit knowledge to real-life devices such as smartphones, electric vehicles, LED lighting and smart door locks

- Use an ammeter, voltmeter and ohmmeter to trace faults in a DC circuit
- Identify open circuit, short circuit, dry joints and loose terminals in a circuit setup
- Discuss and record observations on how each fault affects circuit behaviour
- Share findings with peers

- Brainstorm and discuss various applications of DC circuits in daily life
- Identify battery-powered devices around the school and home environment
- Discuss how DC circuits are used in home automation and car safety systems
- Present findings to the class

How are measuring instruments used to identify and trace faults in DC circuits?
How are DC circuits applied in everyday devices such as mobile phones, electric vehicles and home automation systems?

- Distinction Electricity Grade 10 pg. 13
- Ammeter
- Voltmeter
- Ohmmeter
- Assorted resistors
- Connecting wires

- Distinction Electricity Grade 10 pg. 29
- Digital devices
- Internet access
- Reference books

- Practical tasks - Observation - Written tests
- Oral questions - Observation - Written assignments

Fundamentals of Electricity

D.C Electric Circuits - Applications of DC circuits

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

- Compare the use of different types of batteries in various DC-powered devices
- Discuss battery efficiency, lifespan and environmental impact
- Connect knowledge of battery-powered DC systems to real-life choices such as preferring rechargeable batteries in portable electronics to reduce waste

- Use print or digital media to research battery efficiency, lifespan and environmental impact
- Discuss why rechargeable batteries are preferred in some applications
- Identify devices around school or home that use batteries and classify them
- Present findings in class

Why are rechargeable batteries preferred over primary batteries in devices such as mobile phones and laptops?

- Distinction Electricity Grade 10 pg. 29
- Digital devices
- Internet access
- Sample batteries

- Oral questions - Observation - Written assignments

Fundamentals of Electricity

D.C Electric Circuits - Applications of DC circuits

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

- Compare the use of different types of batteries in various DC-powered devices
- Discuss battery efficiency, lifespan and environmental impact
- Connect knowledge of battery-powered DC systems to real-life choices such as preferring rechargeable batteries in portable electronics to reduce waste

- Use print or digital media to research battery efficiency, lifespan and environmental impact
- Discuss why rechargeable batteries are preferred in some applications
- Identify devices around school or home that use batteries and classify them
- Present findings in class

Why are rechargeable batteries preferred over primary batteries in devices such as mobile phones and laptops?

- Distinction Electricity Grade 10 pg. 29
- Digital devices
- Internet access
- Sample batteries

- Oral questions - Observation - Written assignments