Introduction to Electronics

Where this fits in the syllabus

Grade 11 · Term 2

Key points to revise

Revise Introduction to Electronics fast with concise, exam-ready key points

About O/L Science: O/L Science integrates physics, chemistry, and biology into a single subject across Grade 10 and 11.

• Logic gates process binary signals (0 = low voltage, 1 = high voltage)
• AND gate: output HIGH only when ALL inputs HIGH
• OR gate: output HIGH when AT LEAST ONE input is HIGH
• NOT gate (inverter): output is always opposite of input
• Transistor: semiconductor switch; small base current controls large collector current

Must know

• AND gate: output 1 only if BOTH inputs are 1
• OR gate: output 1 if AT LEAST ONE input is 1
• NOT gate (inverter): output is opposite of input (1→0, 0→1)
• NAND = AND + NOT; NOR = OR + NOT (universal gates)
• Binary: 0 = low voltage; 1 = high voltage

Source: NIE O/L Science Grade 11 — Unit 8: Electronics

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In the Syllabus