Advanced Qualification · A-002 Advanced components and circuits · A-002-002-002
What type of semiconductor diode varies its internal capacitance as the voltage applied to its terminals varies?
- AHot-carrier (Schottky)
- BVaractor
- CZener
- DSilicon-controlled rectifier
Correct answer: B — Varactor. From the official ISED question bank, verified word for word.
Why
A Varactor diode is designed specifically to change its internal capacitance when you adjust the voltage across it, acting like a voltage-controlled capacitor. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced components and circuits is section A-002 of the Advanced exam: Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.
Drill A-002 — free, no account