Advanced Qualification · A-002 Advanced components and circuits · A-002-012-001
What are the three general groupings of filters?
- A Hartley, Colpitts and Pierce
- B Audio, radio and capacitive
- C Inductive, capacitive and resistive
- D High-pass, low-pass and band-pass
Correct answer: D — High-pass, low-pass and band-pass. From the official ISED question bank, verified word for word.
Why
Filters are named for the range of frequencies they let through: high-pass blocks low sounds while letting high ones pass, low-pass does the opposite, and band-pass allows only a specific middle range. 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.