In this chapter, we will be learning about electricity and magnetism. We will start by understanding the generation of electricity, including renewable and non-renewable energy sources. We will also learn how electricity is generated from different energy sources through examples.
Next, we will explore transformers and their importance in electrical home appliances. We will even get to build our own step-up and step-down transformers through an experiment. We will also learn how to communicate about transformers and their uses.
Moving on, we will study the transmission and distribution of electricity. We will understand the function of different components in this process by drawing diagrams. We will also learn about electricity supply and wiring systems in homes through examples.
Lastly, we will learn how to calculate the cost of electricity consumption. We will define energy efficiency and explore examples of technology that apply this concept. By the end of this chapter, we will have a solid understanding of electricity and magnetism.
• Describe energy sources in terms of renewable energy and non-renewable energy
• Explain with examples the process of generating electricity from various sources of energy
• Differentiate between direct current and alternating current
• Solve problems related to electricity supply in life
• Carry out an experiment to build a step-up and a step-down transformer
• Communicate about transformers and the use of transformers in electrical home appliances
• Solve numerical problems using formula involving transformers
• Explain the function of components in the transmission and distribution of electricity by drawing
• Explain with examples electricity supply and wiring systems in homes
• Distinguish between safety components in a home electrical wiring system
• Communicate about safety in transmission and distribution of electricity and the use of electrical appliances
• Define energy efficiency
• List examples of technology that applies the concept of energy efficiency
• Determine the amount of electricity used in electrical appliances
• Relate electrical energy consumption, power and time by calculating the cost of electrical energy used by electrical appliances
• Conduct a home energy audit of electrical appliances used as a measure to save electricity usage at home
• Communicate about ways of saving electrical energy usage at home
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