Circuit and Machines · SHS1 Engineering

Lesson notes

Learning Objectives

Indicator: 1.2.1.LI.2 - Classify circuit elements into passive and active elements.

By the end of the lesson, learners can:

Define passive and active circuit elements in their own words, distinguishing between elements that can supply energy and those that can only absorb or store it.
Classify common circuit elements (resistors, capacitors, inductors, switches, batteries, generators, transistors, diodes) as either passive or active, giving a reason for each classification.
Explain the key differences between passive and active elements in terms of energy behaviour, voltage-current relationship and need for an external power source.
Construct a concept map that organises circuit elements into passive and active categories, using the correct circuit symbols from the previous week’s lesson.
Justify the classification of a given circuit element in a mixed-ability group discussion, defending their reasoning with reference to how the element behaves in a circuit.

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Curriculum details

Strand: Energy Systems (Strand 2)
Sub-strand: Circuit and Machines (2.1)
Content standard: 1.2.1.CS.1 - Demonstrate knowledge of simple electric circuits based on first principles and through simulation tools. 1.2.1.LO.1 Identify and explain the functions of the elements of dc and ac circuits. 1.2.1.LO.2 Analyse simple dc and single-phase ac circuits.
Indicator: 1.2.1.LI.2 - Classify circuit elements into passive and active elements.
Suggested placement: Semester 1, Week 15 (Week 15 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: NaCCA curriculum document, p. 36

Exemplars (from the NaCCA curriculum)

Initiating Talk for Learning: In a question-and-answer session, learners make a distinction between passive and active circuit elements. Use concept maps to organise the contributions and thoughts of learners.
In small mixed-ability groups, learners classify the circuit elements as passive and active and share their reports with the whole class.

Assessment (1.2.1.AS.2). The document marks these depth-of-knowledge levels for this indicator: Level 1 Recall; Level 4 Extended critical thinking and reasoning.

Teaching and Learning Resources:
- Projector
- Laptop
- Videos on dc and ac circuit elements
- Assorted dc and ac electric circuit elements (e.g., Inductors, capacitors, resistors, switches, etc.)
- Whiteboard and marker
- Whiteboard and marker
- Simulation software (e.g., Proteus)