Advanced Qualification · A-002 Advanced components and circuits · A-002-002-006
Structurally, what are the two main categories of semiconductor diodes?
- A Electrolytic and junction
- B Junction and point contact
- C Vacuum and point contact
- D Electrolytic and point contact
Correct answer: B — Junction and point contact. From the official ISED question bank, verified word for word.
Why
Semiconductor diodes are built in two main structural ways: a junction diode, where two different types of silicon meet to form a barrier, and a point contact diode, which uses a tiny metal wire touching the semiconductor surface. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.