Basic Qualification · B-005 Basic electronics and theory · B-005-008-009
You add a 9 dB gain amplifier to your 2-watt hand-held. What is the power output of the combination?
- A18 watts
- B16 watts
- C11 watts
- D20 watts
Correct answer: B — 16 watts. From the official ISED question bank, verified word for word.
Why
Adding 9 dB of gain to your 2-watt radio does not simply double the power once, but rather multiplies it by eight. The full explanation — and one for every question — is in Pro.
Practise this section
Basic electronics and theory is section B-005 of the Basic exam: The theory: Ohm's law, power, series and parallel circuits, AC and DC, frequency and wavelength, decibels, and the metric prefixes the exam leans on.
Drill B-005 — free, no account