Form three Physics notes in pdf- All topics

Oct 29, 2025

Form Three Physics Notes by IDEBE in PDF

In this post, we share Form Three Physics notes prepared by IDEBE to help both students and teachers understand important topics covered in the Tanzanian syllabus. These notes are well-organized, easy to follow, and come with clear explanations, examples, and diagrams that make Physics more interesting and practical.

If you are a Form Three student, these notes will help you build a strong foundation as you prepare for your Form Four national examinations. Teachers can also use them when preparing lessons or class exercises.

Download here form three notes

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Topics Covered in IDEBE Form Three Physics Notes

The notes include all topics as arranged in the current syllabus:

1. Application of Vectors

In this topic, students learn how vectors are used to represent quantities that have both magnitude and direction, such as force and velocity. The notes explain how to add, subtract, and resolve vectors, and show real-life examples like pulling objects or balancing forces.

2. Friction

This section explains the force that opposes motion when two surfaces touch. The notes describe types of friction, the advantages and disadvantages of friction, and how to reduce unwanted friction using lubricants and ball bearings.

3. Light

Here, students learn about the behavior of light, including reflection, refraction, and how light travels in straight lines. The topic includes several practical activities that help learners understand how mirrors and lenses work.

4. Dispersion and Colours

This topic explains how white light can be split into different colours when it passes through a prism. You’ll also learn about the seven colours of the rainbow and how dispersion happens in daily life.

5. Optical Instruments

Students are introduced to different instruments that use lenses and mirrors such as the human eye, microscope, telescope, periscope, and camera. The notes explain how each of these devices forms images and their uses in our daily lives.

6. Thermal Expansion

This topic discusses how solids, liquids, and gases expand when heated and contract when cooled. Practical examples such as expansion in bridges, metal rods, and thermometers are included to help learners understand the concept.

7. Transfer of Thermal Energy

Here you’ll learn how heat moves from one place to another through conduction, convection, and radiation. The notes give daily examples, such as how heat travels in cooking pots, houses, or the environment.

8. Measurement of Thermal Energy

Students learn about temperature, heat capacity, and specific heat capacity. The notes show how to measure thermal energy using instruments like thermometers and calorimeters.

9. Vapour and Humidity

This part explains how water turns into vapour, how condensation happens, and what humidity means. It also covers how humidity affects weather and how it is measured using a hygrometer.

10. Current Electricity

This is one of the most interesting topics. It covers the flow of electric current, Ohm’s Law, resistance, and types of electric circuits (series and parallel). The notes include worked examples and practical activities to make the topic easier to understand.

Each topic includes definitions, formulas, experiments, and exercises to help students practice effectively.