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 capacitor is.
• Identify different types of capacitors.
• Explain the functions of a capacitor in a circuit.
• Calculate capacitor values using color codes.

Lesson summary

Welcome, future engineers and technicians! Today, we are looking at a tiny but powerful component that is inside almost every electronic device you use – from your phone charger and television set to the fan in this classroom. This component is called a capacitor. Understanding how it works is fundamental to understanding electronics. Think about how a phone charger takes the rough electricity from the wall socket and turns it into smooth power for your phone, or how a camera flash gives a sudden, bright burst of light. Capacitors are the heroes behind these jobs.

Lesson notes

2.1 What is a Capacitor?

A capacitor is a passive electronic component that stores electrical energy in an electric field.

Think of it like a small, very fast rechargeable battery. A battery stores a lot of energy and releases it slowly. A capacitor stores a small amount of energy but can release it almost instantly.

Structure: The simplest capacitor consists of two parallel conductive plates (usually made of metal like aluminium) separated by an insulating material called a dielectric. The dielectric can be made of paper, ceramic, plastic, or even air.

Evaluation guide

• Describe types capacitor as a passive electronic component
• Collaborative Learning: Using videos and pictures engage learners in mixed ability
• groups to undergo the following activities:
• Define capacitor