Basic Qualification · B-004 Circuit components · B-004-002-003
The primary purpose of a Zener diode is to:
- A regulate or maintain a constant voltage
- B provide a voltage phase shift
- C boost the power supply voltage
- D provide a path through which current can flow
Correct answer: A — regulate or maintain a constant voltage. From the official ISED question bank, verified word for word.
Why
A Zener diode is designed to hold a specific voltage steady even when the current flowing through it changes, making it ideal for regulating or maintaining a constant voltage in a circuit. The full explanation — and one for every question — is in Pro.
Practise this section
The parts inside the box: resistors, capacitors, inductors, diodes, transistors, tubes and what each does in a circuit.