Unit 8 Making Use of Electricity

Electricity is the most common source of energy used at home. In making use of electricity, various kinds of electrical components are connected in different types of circuits to achieve different purposes. The concepts of current, voltage and resistance are essential for understanding the practical use of electricity in households. As there may be potential hazards in using electricity, particular attention should be paid to the safety aspects of domestic electricity.

In this Unit, students will learn about the different aspects of electricity through connecting circuits, drawing and interpreting circuit diagrams, and conducting a series of practical works and investigations. In the process, the science process skills of choosing and handling apparatus, measuring and recording data, inferring, communicating and identifying variables will be developed. Furthermore, designing circuits and making electrical devices, can also help foster students’ creativity and innovative mind. The study of the patterns of changes in currents and voltages in series and parallel circuits helps students recognise the unifying concepts “change and constancy”.