SHS1 Physics · Semester 2 Week 15: Analogue Electronics

Lesson notes

Learning Objectives

Indicator: 1.3.3.LI.1 - Describe the construction and action of the bipolar junction transistor.

By the end of the lesson, learners can:

Identify the three regions (emitter, base, and collector) of a bipolar junction transistor (BJT) and state the doping type of each region for both NPN and PNP types.
Draw and label a labelled diagram of an NPN transistor and a PNP transistor, showing the correct symbols.
Explain the action of a BJT in terms of the movement of charge carriers (electrons and holes) across the two PN junctions.
Describe how a small base current controls a larger collector current in a BJT.
Give at least two domestic applications of BJTs and describe the role the transistor plays in each.

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Curriculum details

Strand: Electric Field, Magnetic Field and Electronics (Strand 3)
Sub-strand: Analogue Electronics (3.3)
Content standard: 1.3.3.CS.3 - Demonstrate knowledge and understanding of the processes and functions of the Bipolar Junction 1.3.3.LO.3 Explain the structure and operations of Bipolar Junction Transistors and their applications.
Indicator: 1.3.3.LI.1 - Describe the construction and action of the bipolar junction transistor.
Suggested placement: Semester 2, Week 15 (Week 35 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.
Source document note: The official curriculum document has a fault in this entry, so the curriculum text above is transcribed exactly as printed:

content standard text - p.70: the document prints this learning outcome code as 1.3.3.LO.3.1
Curriculum reference: NaCCA curriculum document, p. 76

Exemplars (from the NaCCA curriculum)

Project-Based Learning: Learners in pairs, describe various applications employing BJTs to solve domestic challenges. Learners will draw, complete and label diagrams to explain the construction and processes of a BJT.
Encourage self-awareness and personal growth by fostering an environment where learners feel comfortable sharing their reflections and experiences.
Assessment (1.3.3.AS.1). The document marks these depth-of-knowledge levels for this indicator: Level 2 Skills of conceptual understanding.
Teaching and Learning Resources:
- Videos
- PhET interactive simulations
- Flash cards, Interactive virtual laboratory