Class: Senior Secondary School 1 (SS1 / SSS 1)
Term: 1st Term
Week: 8
Age: 15 years
Duration: 45 minutes
Subject: Radio, Tv & Electronics
Curriculum Theme: Trade
Previous Lesson: Current, Voltage And Resistance: Definitions, Units And Symbols.
Topic: CURRENT, VOLTAGE AND RESISTANCE
Subject Matter: Laws of attraction, Laws of repulsion, Charge interaction

Specific Objectives

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

Cognitive Domain:

Define electric charge.
State the law of attraction and repulsion between electric charges.
State the law of attraction and repulsion between magnetic poles.

Affective Domain:

Appreciate the fundamental nature of these laws in understanding electricity.
Show interest in observing charge and magnetic pole interactions.

Psychomotor Domain:

Sketch simple diagrams illustrating the interaction of charges.
Sketch simple diagrams illustrating the interaction of magnetic poles.

Participate in class discussions on the principles of attraction and repulsion.

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 Radio, Tv & Electronics (SSS 1).
Basic Electronics for Senior Secondary Schools by [Author/Publisher, e.g., F.N. Okoro].
https://www.google.com/search?q=basic+electricity+principles+sss1

Instructional Materials

The teacher will teach this lesson with the aid of:

A magnet set (bar magnets, horseshoe magnets).
A charge diagram chart showing positive and negative charges interacting.
Whiteboard/chalkboard and markers/chalk.

Rationale for the Lesson

This lesson helps pupils understand the basic forces between charges and magnetic poles. This knowledge is important because it forms the foundation for understanding how electricity works and how electronic components interact in circuits.

Prerequisite/Previous Knowledge

Pupils have a basic understanding of matter and atoms, including the idea that atoms contain smaller particles.

Lesson Content/Board Summary

CURRENT, VOLTAGE AND RESISTANCE

1. Electric Charge

Electric charge is a fundamental property of matter that causes it to experience a force when placed in an electromagnetic field. Charges can be positive or negative.

2. Laws of Charge Interaction

Electric charges exert forces on each other. The nature of these forces (attraction or repulsion) depends on the types of charges involved.

The following are the laws of charge interaction:

Like charges repel: Two positive charges will push each other away, and two negative charges will also push each other away.
Unlike charges attract: A positive charge and a negative charge will pull each other closer.

3. Laws of Magnetic Pole Interaction

Magnets have two poles: a North (N) pole and a South (S) pole. These poles also exert forces on each other.

The following are the laws of magnetic pole interaction:

Like poles repel: If two North poles are brought together, they will push each other away. Similarly, two South poles will repel each other.
Unlike poles attract: If a North pole and a South pole are brought together, they will pull each other closer.

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 reviews their previous lesson briefly. The teacher then asks pupils to recall what they know about magnets or static electricity (e.g., rubbing a comb through hair). The teacher introduces the topic by explaining that understanding how charges and magnets interact is fundamental to electronics.
Pupils’ Activity: Pupils respond to greetings and questions, sharing their prior knowledge. They listen attentively to the introduction.
Learning Point: Pupils are engaged and connect previous knowledge to the new topic.

Step 2: Explanation of Electric Charge

Time: 7 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher defines electric charge and explains that there are two types: positive and negative. The teacher uses the charge diagram chart to illustrate these types.
Pupils’ Activity: Pupils listen, take notes, and observe the chart. They may ask questions for clarification.
Learning Point: Pupils understand the definition and types of electric charge.

Step 3: Explanation of Laws of Charge Interaction

Time: 10 minutes
Teaching Skill: Elaboration/Illustration
Teacher’s Activity: The teacher explains the laws of attraction and repulsion between electric charges, using clear examples and sketching diagrams on the whiteboard to show how like charges repel and unlike charges attract. The teacher refers to the charge diagram chart.
Pupils’ Activity: Pupils listen, take notes, and observe the sketches and chart. They participate by identifying which charges will attract or repel.
Learning Point: Pupils learn the laws governing the interaction of electric charges.

Step 4: Explanation of Laws of Magnetic Pole Interaction

Time: 8 minutes
Teaching Skill: Demonstration/Explanation
Teacher’s Activity: The teacher explains the laws of attraction and repulsion between magnetic poles. The teacher demonstrates these laws using the magnet set, showing how like poles repel and unlike poles attract. The teacher sketches diagrams on the board to reinforce the demonstration.
Pupils’ Activity: Pupils observe the demonstration and sketches, noting the similarities to charge interaction. They may try to predict the outcome of bringing poles together.
Learning Point: Pupils understand the laws governing the interaction of magnetic poles.

Step 5: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

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

What is electric charge?
State the laws of attraction and repulsion for electric charges.
State the laws of attraction and repulsion for magnetic poles.
Draw a simple diagram showing two unlike charges interacting.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 6: Conclusion

Time: 5 minutes
Teaching Skill: Summarization/Consolidation
Teacher’s Activity: The teacher summarises the key points of the lesson, reiterating the importance of understanding charge and magnetic pole interactions as a foundation for future topics in electronics. The teacher assigns homework: “Draw and label diagrams illustrating all the laws discussed today.”
Pupils’ Activity: Pupils listen to the summary and copy down the homework.
Learning Point: Pupils consolidate their learning and prepare for independent practice.

Lesson Keywords

Charge – A fundamental property of matter that causes it to experience a force in an electromagnetic field.
Attraction – The force that pulls two objects towards each other.
Repulsion – The force that pushes two objects away from each other.
Pole – One of the two ends of a magnet where the magnetic field is strongest (North or South).

Differentiation

For pupils who grasp concepts quickly, the teacher can ask them to explain how these laws apply in real-world devices. For pupils needing more support, the teacher will provide additional one-on-one explanations and simpler diagrams, ensuring they can identify and state the basic laws.

Note for teachers using this lesson plan

Ensure the demonstrations with magnets are clear and visible to all pupils. Encourage active participation and questioning throughout the lesson. Emphasise that understanding these basic interactions is a stepping stone to understanding more complex electrical and electronic concepts.