Basic Qualification · B-003 Station assembly, practice and safety · B-003-008-003
What is the purpose of the rectifier in a linear power supply?
- A Ensure that the voltage stays constant when a heavy demand is placed on the supply
- B Convert the AC mains voltage up or down as required and provide isolation
- C Smooth out pulsating direct current
- D Convert alternating current into direct current
Correct answer: D — Convert alternating current into direct current. From the official ISED question bank, verified word for word.
Why
A rectifier acts like a one-way valve for electricity, allowing current to flow in only one direction. The full explanation — and one for every question — is in Pro.
Practise this section
Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.