Module Workbook

Module 20: Physics

Radioactivity and electronics.

Use this workbook to practice core KCSE communication skills and record evidence of progress.

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SECTION: PHYSICS

MODULE: 20

Part A: Units

1. Radioactivity

a. Radioactive decay

b. Half life

c. Types of radiations

d. Properties of radiations

e. Detectors of radiation

f. Nuclear fission

g. Nuclear fusion

h. Nuclear equations

i. Hazards of radioactivity

j. Precautions

k. Application

l. Problems on half life

2. Electronics

a. Conductors

b. Semiconductors

c. Insulators

d. Intrinsic and extrinsic semiconductors

e. Doping, p-n junction

f. Applications of diodes: half wave rectification and full wave rectification

Part B: Project

Apply radioactivity and electronics concepts to real devices.

Project Title: Radiation and Electronics Study

Objective: Explain radiation safety and basic semiconductor applications.

Project Instructions:

1. Describe radioactive decay and calculate one half-life problem.
2. List detectors of radiation and their uses.
3. Explain hazards and safety precautions of radioactivity.
4. Compare conductors, insulators, and semiconductors.
5. Describe a diode application (half or full wave rectifier).
6. Consult your coach where necessary.

Evidence to Submit:

• Half-life solution and notes.
• Radiation safety summary.
• Semiconductor and diode explanation.

Submission

Part C: Training Others

Teach a peer about radiation and semiconductors.

Guidance:

• Explain types of radiation and detectors.
• Discuss fission and fusion in simple terms.
• Describe p-n junctions and diode use.

Reflection:

• What did the learner understand well?
• What needed more explanation?
• What support do you need from your coach?

Submission

Part D: Assessment

Competency Levels:

1 = Expectations not met

2 = Partially met

3 = Satisfactorily met

4 = Excellently met

Coach assessment: Learner completes the self-assessment using the 1-4 scale. The coach prepares a short quiz or conversation (outside the system if needed) and assigns the coach score.

Self-assessment:

• Radioactive decay and half-life:
• Radiation hazards and precautions:
• Semiconductors and diode applications:

Coach assessment:

• Radioactive decay and half-life:
• Radiation hazards and precautions:
• Semiconductors and diode applications:

Submission

Ready for the next module?

Keep your learning rhythm steady and record your reflections as you progress.

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