Applications of Electronics · SHS3 Physics

Lesson notes

Learning Objectives

Indicator: 3.3.4.LI.1 - Design a PNP amplifier.

By the end of the lesson, learners can:

Identify the three terminals of a PNP transistor (emitter, base, collector) and state the polarity of voltages required to forward-bias and reverse-bias its junctions.
Explain how a small base current controls a larger collector current in a PNP transistor, using the concepts of holes and conventional current direction.
Draw and label a complete circuit diagram of a PNP common-emitter amplifier, showing the input, output, coupling capacitors, bias resistors, and DC supply connections.
Calculate the voltage gain of a PNP amplifier circuit given the input and output voltage values.
Construct and test a PNP amplifier circuit (on breadboard or simulation) and measure its output, comparing it with the input signal.

Sign in with your phone number to read the full note and download the GES plan - free.

Sign in with phone number

Curriculum details

Strand: Electric Field, Magnetic Field and Electronics (Strand 3)
Sub-strand: Applications of Electronics (3.4)
Content standard: 3.3.4.CS.2 - Demonstrate knowledge and understanding of signal amplification. 3.3.4.LO.2 Using a transistor explain how amplification is done.
Indicator: 3.3.4.LI.1 - Design a PNP amplifier.
Suggested placement: Semester 2, Week 14 (Week 34 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. 194

Exemplars (from the NaCCA curriculum)

Collaborative learning: Using simulations and multimedia, let learners watch a video/simulation of how an PNP amplifier is built.
Foster respect and inclusion, creating an inclusive and welcoming classroom environment that values the contributions of individuals from all backgrounds and genders.
Assessment (3.3.4.AS.1). 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