Basic Qualification · B-004 Circuit components · B-004-002-001
A diode is in series in the positive power lead to a transceiver. What is its purpose?
- AReverse polarity protection
- BProtect against voltage transients
- CPermit AC operation
- DOvercurrent protection
Correct answer: A — Reverse polarity protection. From the official ISED question bank, verified word for word.
Why
Placing a diode in series with the positive power lead stops current from flowing if the battery is connected backwards, which prevents damage to the transceiver. The full explanation — and one for every question — is in Pro.
Practise this section
Circuit components is section B-004 of the Basic exam: The parts inside the box: resistors, capacitors, inductors, diodes, transistors, tubes and what each does in a circuit.
Drill B-004 — free, no account