Electricity and Electronics · JHS3 Science

Lesson notes

Learning Objectives

Indicator: B9.4.2.1.1 - Demonstrate transformation of electrical energy to other forms of energy in both series and parallel circuits and perform simple calculations involving the flow of current in circuits.

By the end of the lesson, learners can:

Explain how electrical energy is transformed into light and heat energy in bulbs within both series and parallel circuits.
Predict what happens to the brightness of bulbs when additional bulbs are added to a series circuit versus a parallel circuit, giving reasons for their predictions.
Construct simple series and parallel circuits using cells, wires and bulbs, and correctly measure current with an ammeter and voltage with a voltmeter.
Calculate potential difference (V) using the formula V = IR when given any two of the three quantities (current, resistance, potential difference).
Evaluate and compare the effectiveness of series and parallel circuits in solving a real-life electrical problem, choosing the more suitable arrangement with justification.

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Curriculum details

Strand: Forces and Energy (Strand 4)
Sub-strand: Electricity and Electronics (4.2)
Content standard: B9.4.2.1 - Construct electrical circuits and illustrate how electrical energy is transformed into other forms of energy and perform electrical calculations
Indicator: B9.4.2.1.1 - Demonstrate transformation of electrical energy to other forms of energy in both series and parallel circuits and perform simple calculations involving the flow of current in circuits.
Suggested placement: Term 2, Week 9 (Week 21 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: Science, Common Core Programme (JHS1-JHS3), 2023, p. 109
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

1. Predict the impact of changes in electrical circuits with regards to the output of bulbs. Describe how electrical energy transformation occurs in series and parallel circuits.
2. Construct simple electrical circuits and measure the voltage, current and resistance.
3. Calculate the potential difference in a circuit using the formula: V = IR (where I is the current and R the resistance).