Electrostatics · SHS2 Physics

Lesson notes

Learning Objectives

Indicator: 2.3.1.LI.3 - Determine the capacitance of a parallel plate capacitor.

By the end of the lesson, learners can:

Recall the definition of capacitance and state its SI unit and formula (C = Q/V).
State the factors that affect the capacitance of a parallel plate capacitor: plate area, distance of separation, and the permittivity of the dielectric material.
Apply the formula C = ε₀A/d to calculate the capacitance of a parallel plate capacitor with air as the dielectric.
Use the formula C = ε₀εᵣA/d to calculate capacitance when a dielectric material is placed between the plates.
Compare and explain how changing each factor (area, distance, dielectric) affects the capacitance, using strategic reasoning to predict outcomes.

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Curriculum details

Strand: Electric Field, Magnetic Field and Electronics (Strand 3)
Sub-strand: Electrostatics (3.1)
Content standard: 2.3.1.CS.2 - Demonstrate knowledge and understanding of the structure and operation of capacitors. 2.3.1.LO.2 Explain and analyse the structure and working principles of capacitors and calculate capacitance.
Indicator: 2.3.1.LI.3 - Determine the capacitance of a parallel plate capacitor.
Suggested placement: Semester 2, Week 4 (Week 24 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. 120

Exemplars (from the NaCCA curriculum)

Talk for Learning: Use the factors that affect the capacitance that affect parallel plate capacitor i.e., the area of the plate, the permittivity of the dielectric material and the distance of separation between the plates.
Explore contributions of vulnerable groups in the class.
Assessment (2.3.1.AS.3). The document marks these depth-of-knowledge levels for this indicator: Level 1 Recall; Level 3 Strategic reasoning.
Teaching and Learning Resources:
- Science experimental kit with capacitors and connectors