Grade 10 Electricity Term 3 Scheme of Work

Electricity • Grade 10

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📘 Preview: Week 6 (Random Sample)

Week Lesson Strand Sub-strand Lesson Learning Outcomes Learning Experiences Key Inquiry Question(s) Learning Resources Assessment Reflection
6 1 Electronics 4.2 Semiconductor Diodes By the end of the lesson, the learner should be able to:
a) describe forward bias operation of a diode;
b> explain electron-hole recombination and barrier reduction;
c> appreciate unidirectional flow.		 The learners will be guided to:
i> animate forward bias with student actors;
ii> observe LED lighting under forward bias;
iii> sketch energy diagram.		 Why does a diode only allow current one way? Diodes, LEDs, animations Operation explanation rubric —
6 2 Electronics 4.2 Semiconductor Diodes By the end of the lesson, the learner should be able to:
a) describe reverse bias operation;
b) explain minimal leakage current and breakdown;
c> value diode as a switch.		 The learners will be guided to:
i> test diode in reverse with meter;
ii> observe high resistance;
iii> discuss Zener breakdown limit.		 What happens when we push current the wrong way? Diodes, meters, datasheets Reverse bias analysis rubric —
6 3 Electronics 4.2 Semiconductor Diodes By the end of the lesson, the learner should be able to:
a) plot I-V characteristics of a silicon diode;
b> identify knee voltage (~0.7V);
c> demonstrate experimental precision.		 The learners will be guided to:
i> build circuit with variable DC supply;
ii> record V and I;
iii> graph and label key regions.		 Where does the diode “turn on”? Power supply, diodes, meters I-V graph rubric —
6 4 Electronics 4.2 Semiconductor Diodes By the end of the lesson, the learner should be able to:
a) connect diodes in half-wave rectifier circuit;
b) observe AC to pulsating DC conversion;
c) appreciate power supply design.		 The learners will be guided to:
i> build rectifier with transformer, diode, load;
ii> view input/output on oscilloscope (or simulate);
iii> discuss ripple.		 How do we convert wall AC to device DC? Rectifier kits, scopes Rectifier functionality rubric —
6 5 Electronics 4.2 Semiconductor Diodes By the end of the lesson, the learner should be able to:
a) connect diodes in full-wave bridge rectifier;
b) compare output to half-wave;
c> value efficiency in design.		 The learners will be guided to:
i> wire 4-diode bridge;
ii> measure smoother DC output;
iii> calculate efficiency gain.		 Why use four diodes instead of one? Bridge kits, meters Bridge rectifier rubric —

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