Class: Senior Secondary School 1 (SS1, SS 1, SSS1, SSS 1)
Term: 3rd Term
Week: 1
Age: 15 years
Duration: 45 minutes
Subject: Basic Electricity
Curriculum Theme: Basic Electricity
Previous Lesson: .
Topic: ELECTRO-MAGNETISM
Subject Matter: concept of electromagnetism, Faraday’s laws of electromagnetic induction, simple demonstration of induction with conductor and magnetic field

Specific Objectives

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

Cognitive Domain:

Define electromagnetism.
State Faraday’s laws of electromagnetic induction.
Explain the principle of electromagnetic induction.

Affective Domain:

Appreciate the importance of electromagnetism in daily life.
Show interest in observing demonstrations of electromagnetic induction.

Psychomotor Domain:

Demonstrate electromagnetic induction using simple materials.
Draw a simple diagram illustrating electromagnetic induction.

Participate collaboratively in group discussions and observations during the demonstration.

Reference Materials

The following resources were used in planning this lesson:

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

Instructional Materials

The teacher will teach this lesson with the aid of:

A bar magnet
A coil of conductor wire
A galvanometer
Diagrams illustrating Faraday’s laws
Whiteboard/Chalkboard and markers/chalk

Rationale for the Lesson

This lesson helps pupils understand how electricity and magnetism are related, which is important for explaining how many electrical devices work. It enables pupils to grasp the fundamental principles behind generators and transformers, which are common technologies in their environment.

Prerequisite/Previous Knowledge

Pupils are expected to have a basic understanding of magnets, magnetic fields, electric current, and conductors from previous lessons.

Lesson Content/Board Summary

ELECTRO-MAGNETISM

Concept of Electromagnetism

Electromagnetism is the study of the relationship between electricity and magnetism. It explains how electric currents produce magnetic fields and how changing magnetic fields can produce electric currents.

When an electric current flows through a conductor, it creates a magnetic field around the conductor. This magnetic field can be used to attract or repel other magnetic materials.

Faraday’s Laws of Electromagnetic Induction

Electromagnetic induction is the process by which a conductor placed in a changing magnetic field (or a conductor moving through a stationary magnetic field) has an electromotive force (EMF) induced across it. If the conductor forms a closed circuit, an induced current will flow.

The following are Faraday’s Laws of Electromagnetic Induction:

Faraday’s First Law: Whenever the magnetic flux linking a conductor or a coil changes, an electromotive force (EMF) is induced in the conductor or coil.
Faraday’s Second Law: The magnitude of the induced EMF is directly proportional to the rate of change of magnetic flux linkage.

Factors Affecting the Magnitude of Induced EMF

The following factors affect the magnitude of induced EMF:

The strength of the magnetic field.
The number of turns in the coil (if a coil is used).
The speed at which the conductor moves relative to the magnetic field (or the rate of change of magnetic flux).

Simple Demonstration of Induction

Electromagnetic induction can be demonstrated by moving a bar magnet rapidly into and out of a coil of wire connected to a galvanometer. The deflection of the galvanometer indicates the presence and direction of the induced current.

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 magnets and electricity. The teacher then introduces the topic “Electromagnetism” by asking if there is a relationship between electricity and magnetism.
Pupils’ Activity: Pupils respond to the questions and listen attentively to the introduction of the new topic.
Learning Point: Pupils recall prior knowledge and are prepared for the new lesson.

Step 2: Concept of Electromagnetism

Time: 10 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher explains the concept of electromagnetism, defining it as the relationship between electricity and magnetism. The teacher explains that an electric current creates a magnetic field.
Pupils’ Activity: Pupils listen, take notes, and ask questions for clarification.
Learning Point: Pupils understand the fundamental concept of electromagnetism.

Step 3: Faraday’s Laws of Electromagnetic Induction

Time: 10 minutes
Teaching Skill: Elucidation/Explanation
Teacher’s Activity: The teacher explains Faraday’s two laws of electromagnetic induction, stating them clearly and explaining the meaning of induced EMF and current. The teacher also mentions the factors affecting the magnitude of the induced EMF.
Pupils’ Activity: Pupils listen, take notes, and state Faraday’s laws orally.
Learning Point: Pupils learn Faraday’s laws and the factors influencing induced EMF.

Step 4: Simple Demonstration of Induction

Time: 10 minutes
Teaching Skill: Demonstration/Observation
Teacher’s Activity: The teacher uses a magnet, a coil of wire, and a galvanometer to demonstrate electromagnetic induction. The teacher moves the magnet into and out of the coil, pointing out the deflection on the galvanometer.
Pupils’ Activity: Pupils observe the demonstration carefully and describe what they see happening on the galvanometer.
Learning Point: Pupils visually confirm the principle of electromagnetic induction.

Step 5: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

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

Define electromagnetism.
State Faraday’s First Law of Electromagnetic Induction.
Mention two factors that affect the magnitude of induced EMF.
Describe how you can demonstrate electromagnetic induction.

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/Assignment
Teacher’s Activity: The teacher summarizes the key points of the lesson, reiterating the definition of electromagnetism, Faraday’s laws, and the demonstration. The teacher then gives homework related to the topic.
Pupils’ Activity: Pupils listen to the summary and copy the homework.
Learning Point: Pupils consolidate their learning and are given tasks to reinforce understanding.

Lesson Keywords

Electromagnetism – The study of the relationship between electricity and magnetism.
Induction – The process of generating an electric current or EMF in a conductor by changing the magnetic field around it.
Faraday’s Laws – Principles that describe how an EMF is induced by a changing magnetic flux.
Magnetic Field – The area around a magnet or a current-carrying conductor where magnetic force is exerted.
Conductor – A material that allows electric current to flow through it easily.
Galvanometer – An instrument used for detecting and measuring small electric currents.
EMF – Electromotive force, the voltage generated by a battery or by electromagnetic induction.

Differentiation

For pupils who grasp concepts quickly, the teacher can provide additional questions on real-life applications of electromagnetism (e.g., electric motors, transformers). For pupils who need more support, the teacher can provide simplified diagrams and allow for peer tutoring during the demonstration.

Note for teachers using this lesson plan

Ensure all demonstration materials are functional and set up before the lesson begins. Encourage pupils to ask questions and actively participate in the demonstration. Emphasize safety precautions when handling electrical components if practical work is extended beyond observation.