Lesson Notes By Weeks and Term v4 - SHS 2

Lesson Video

This page supports the lesson note with a companion video and a short classroom-ready summary.

For class groups and homework, share this lesson page so learners also get the summary, objectives, and full lesson context.

Performance objectives

• Define what a cell is and describe its composition.
• Identify and outline the different types of cells.
• Explain the function of cells in electrical circuits.
• Discuss the importance of cells in everyday electronic devices.

Lesson summary

In our daily lives here in Ghana, we are surrounded by devices that need power to work. From the TV remote control in our living rooms and the 'torchlight' (flashlight) we use during power outages ('dumsor'), to the mobile phones that connect us to the world, all these gadgets rely on a small but powerful component: the electric cell. Understanding what cells are, how they are made, and the different types available is fundamental to understanding electronics. This lesson will demystify these power sources, showing you the science behind what makes your devices come to life.

Lesson notes

2.1 What is an Electric Cell?

An electric cell is a single unit device that converts stored chemical energy into electrical energy. It acts as a source of power, providing the "push" or voltage needed to make electric current flow in a circuit.

Think of it like a small chemical factory. Inside, a chemical reaction takes place, and the energy released from this reaction is converted into electricity.

Important Note: Cell vs. Battery In everyday language, we often use the words "cell" and "battery" interchangeably. In technical terms, they are different: A Cell is a single unit (e.g., one AA cell). A Battery is a collection of two or more cells connected together to provide a higher voltage or capacity (e.g., a car battery is made of six 2-volt cells connected in series to make a 12-volt battery). 2.2 Composition of a Simple Cell

Evaluation guide

• Describe the types of cells and their functions in circuits.
• Collaborative Learning: Use videos and pictures engage learners in mixed ability groups
• to undergo the following activities:
• Define cell