Applications of Electronics · SHS3 Physics

Lesson notes

Learning Objectives

Indicator: 3.3.4.LI.2 - Design a full wave rectifier.

By the end of the lesson, learners can:

Explain the difference between a half wave rectifier and a full wave rectifier in terms of the output waveform produced.
Draw the circuit diagram of a centre-tap full wave rectifier, labelling the transformer, two diodes, and the load resistor.
Draw the circuit diagram of a bridge full wave rectifier, labelling the four diodes arranged in the bridge configuration.
Describe the conduction path of current through a bridge rectifier during each half cycle of the alternating current input.
Compare the output waveforms of half wave and full wave rectifiers, identifying which one produces a higher average output voltage.

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Curriculum details

Strand: Electric Field, Magnetic Field and Electronics (Strand 3)
Sub-strand: Applications of Electronics (3.4)
Content standard: 3.3.4.CS.1 - Demonstrate knowledge and understanding of rectification. 3.3.4.LO.1 Using diode, capacitor and a load resistor explain how an ac waveform can be rectified to direct waveform.
Indicator: 3.3.4.LI.2 - Design a full wave rectifier.
Suggested placement: Semester 2, Week 13 (Week 33 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. 193

Exemplars (from the NaCCA curriculum)

Collaborative learning: Using simulations and multimedia, let learners watch a video/simulation of how a full wave rectifier is built.
Encourage self-awareness and personal growth by fostering an environment where learners feel comfortable sharing their reflections and experiences.
Assessment (3.3.4.AS.2). The document marks these depth-of-knowledge levels for this indicator: Level 4 Extended critical thinking and reasoning.
Teaching and Learning Resources:
- Audio-visuals
- Internet
- Projectors
- YouTube
- Reference books
- Flash cards
- Field trips or visits