Electronics & Digital Logic Fundamentals is one of 9 topics in the Grade 11 Electrical Technology CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. What forms at the junction where P-type and N-type semiconductor materials meet in a PN diode?
A depletion layer, creating a natural barrier to current flow
A permanent short circuit with zero resistance
A capacitor plate with no current-blocking property
A resistor with a fixed, unchanging resistance value
Answer: A depletion layer, creating a natural barrier to current flow — A depletion layer forms at the PN junction, where holes and electrons have recombined, leaving no free charge carriers and creating a natural barrier to current flow.
Easy
2. How many diodes does a standard full-wave bridge rectifier use?
Four diodes
One diode
Two diodes
Eight diodes
Answer: Four diodes — A bridge rectifier uses four diodes arranged to produce a full-wave rectified output without needing a centre-tapped transformer.
Medium
3. Name the type of breakdown a Zener diode is specifically designed to safely undergo at its rated reverse voltage, without damage.
Answer: controlled breakdown — A Zener diode is designed to safely enter controlled breakdown at its rated Zener voltage, unlike the destructive avalanche breakthrough an ordinary diode would suffer.
