Advanced Qualification · A-002 Advanced components and circuits · A-002-002-007
What is a common use for point contact diodes?
- A As a constant voltage source
- B As a high voltage rectifier
- C As an RF detector
- D As a constant current source
Correct answer: C — As an RF detector. From the official ISED question bank, verified word for word.
Why
Point contact diodes have a tiny metal wire touching a semiconductor crystal, creating a very small junction that reacts instantly to fast-changing signals. 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.