Class: Senior Secondary School 1 (SS1, SS 1, SSS1, SSS 1)
Term: Second Term
Week: 3
Age: 15 years
Duration: 45 minutes
Subject: Basic Electricity
Curriculum Theme: Basic Electricity
Previous Lesson: Resistivity and Conductivity.
Topic: Capacitance
Subject Matter: Definition of capacitance, unit and symbol of capacitance, connection of capacitors in series, connection of capacitors in parallel, connection of capacitors in series parallel

Specific Objectives

By the end of the lesson, pupils should be able to:

Cognitive Domain:

Define capacitance.
State the SI unit and symbol of capacitance.
Describe the connection of capacitors in series.
Describe the connection of capacitors in parallel.
Explain how to combine capacitors in series-parallel arrangements.

Affective Domain:

Appreciate the role of capacitors in electronic circuits.
Show interest in learning about different capacitor connections.

Psychomotor Domain:

Draw circuit diagrams for capacitors connected in series and parallel.
Connect capacitors in series and parallel on a breadboard.
Calculate the equivalent capacitance for simple series and parallel arrangements.

Collaborate with peers to identify different capacitor connections.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Senior Secondary Schools.
State Unified Scheme of Work for Basic Electricity SSS 1.
New School Physics for Senior Secondary Schools.

Instructional Materials

The teacher will teach this lesson with the aid of:

Capacitors
Breadboard
Connecting wires
Circuit diagrams
Multimeter

Rationale for the Lesson

This lesson helps pupils understand how capacitors store electric charge and how they are connected in circuits. This knowledge is important for designing and understanding various electronic devices used in everyday life.

Prerequisite/Previous Knowledge

Pupils are expected to have basic knowledge of electric charge, potential difference, and simple electrical circuits from previous lessons.

Lesson Content/Board Summary

Capacitance

Definition of Capacitance

Capacitance is the ability of a capacitor to store electric charge. It is defined as the ratio of the charge stored on a conductor to the potential difference across it (C = Q/V).

Unit and Symbol of Capacitance

The following are the unit and symbol of capacitance:

The symbol for capacitance is ‘C’.
The SI unit of capacitance is the Farad (F).
Commonly used smaller units include microfarad (µF) and nanofarad (nF).

Connection of Capacitors in Series

In a series connection, capacitors are connected end-to-end, forming a single path for electric charge. The characteristics of series connection are:

The charge (Q) on each capacitor is the same.
The total potential difference (V) is the sum of the potential differences across each capacitor (V_total = V1 + V2 + V3 + …).
The reciprocal of the total equivalent capacitance (C_total) is the sum of the reciprocals of individual capacitances: 1/C_total = 1/C1 + 1/C2 + 1/C3 + …

Connection of Capacitors in Parallel

In a parallel connection, capacitors are connected across the same two points, providing multiple paths for electric charge. The characteristics of parallel connection are:

The potential difference (V) across each capacitor is the same.
The total charge (Q) stored is the sum of the charges stored on individual capacitors (Q_total = Q1 + Q2 + Q3 + …).
The total equivalent capacitance (C_total) is the sum of the individual capacitances: C_total = C1 + C2 + C3 + …

Connection of Capacitors in Series-Parallel

A series-parallel connection involves a combination of both series and parallel arrangements within the same circuit. To find the total capacitance, simplify the parallel sections first, then combine them with the series sections, or vice versa, depending on the circuit configuration.

Teaching Methods/Instructional Techniques

Discussion, Lecture, Demonstration, Question and Answer, Visual Aids

Instructional Procedures

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: The teacher greets the pupils and asks them to recall what they know about storing electric charge or energy in a circuit. The teacher then introduces the topic of capacitance as the ability to store charge.
Pupils’ Activity: Pupils respond to questions and listen attentively to the introduction.
Learning Point: Pupils connect previous knowledge to the new topic of capacitance.

Step 2: Definition of Capacitance

Time: 7 minutes
Teaching Skill: Explanation
Teacher’s Activity: The teacher defines capacitance as the ability of a capacitor to store electric charge and explains the relationship C = Q/V, where C is capacitance, Q is charge, and V is potential difference.
Pupils’ Activity: Pupils listen, take notes, and ask questions for clarification.
Learning Point: Pupils understand the definition and basic formula for capacitance.

Step 3: Unit and Symbol of Capacitance

Time: 5 minutes
Teaching Skill: Identification
Teacher’s Activity: The teacher states that the symbol for capacitance is ‘C’ and its SI unit is the Farad (F). The teacher also mentions common smaller units like microfarad (µF) and nanofarad (nF), writing them on the board.
Pupils’ Activity: Pupils identify and write down the symbol and units of capacitance.
Learning Point: Pupils can correctly identify the symbol and units of capacitance.

Step 4: Connection of Capacitors in Series

Time: 8 minutes
Teaching Skill: Demonstration/Illustration
Teacher’s Activity: The teacher explains how capacitors are connected in series, draws a circuit diagram on the board, and derives or presents the formula for total capacitance (1/C_total = 1/C1 + 1/C2 + …). The teacher also highlights that charge is the same for each capacitor in series.
Pupils’ Activity: Pupils observe the diagram, copy the formula, and ask questions.
Learning Point: Pupils understand series connection and its equivalent capacitance formula.

Step 5: Connection of Capacitors in Parallel

Time: 8 minutes
Teaching Skill: Demonstration/Illustration
Teacher’s Activity: The teacher explains how capacitors are connected in parallel, draws a circuit diagram, and presents the formula for total capacitance (C_total = C1 + C2 + …). The teacher emphasizes that potential difference is the same for each capacitor in parallel.
Pupils’ Activity: Pupils observe the diagram, copy the formula, and ask questions.
Learning Point: Pupils understand parallel connection and its equivalent capacitance formula.

Step 6: Connection of Capacitors in Series-Parallel

Time: 7 minutes
Teaching Skill: Problem Solving/Application
Teacher’s Activity: The teacher draws a simple circuit diagram showing a combination of series and parallel capacitors. The teacher explains the approach to calculating the total capacitance in such combined circuits, working through an example if time permits.
Pupils’ Activity: Pupils observe the circuit diagram, follow the explanation, and ask questions about the calculation steps.
Learning Point: Pupils grasp the concept of series-parallel connections and how to approach their analysis.

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

Define capacitance.
State the SI unit and symbol of capacitance.
Describe how capacitors are connected in series.
List two characteristics of capacitors connected in parallel.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 2 minutes
Teaching Skill: Summarization
Teacher’s Activity: The teacher briefly summarizes the key points of the lesson, reiterating the definitions, units, and different connections of capacitors. The teacher then gives homework related to calculating equivalent capacitance for simple circuits.
Pupils’ Activity: Pupils listen to the summary and note down the homework.
Learning Point: Pupils consolidate their learning and are prepared for further practice.

Lesson Keywords

Capacitance – The ability of a component to store electric charge.
Capacitor – An electronic component designed to store electric charge.
Farad (F) – The SI unit of capacitance.
Series Connection – A circuit arrangement where components are connected end-to-end, forming a single path for current.
Parallel Connection – A circuit arrangement where components are connected across the same two points, providing multiple paths for current.

Differentiation

The teacher will provide visual aids like circuit diagrams and actual capacitors for visual learners. Practical demonstration of connecting capacitors on a breadboard will cater to kinesthetic learners. Group discussions and question-and-answer sessions will support auditory and collaborative learners.

Note for teachers using this lesson plan

Teachers should ensure all pupils have a clear understanding of basic electrical concepts before commencing this lesson. Practical demonstrations with a multimeter to show voltage and current distribution in series and parallel circuits can enhance understanding. Encourage pupils to draw and label circuit diagrams correctly.