Basic Qualification · B-005 Basic electronics and theory · B-005-007-007
What happens to a signal's frequency as its wavelength gets shorter?
- A It increases
- B It decreases
- C It decreases proportionally to frequency squared
- D It increases proportionally to frequency squared
Correct answer: A — It increases. From the official ISED question bank, verified word for word.
Why
When a radio wave's wavelength gets shorter, the signal's frequency must increase because the two are locked in an inverse relationship: as one shrinks, the other grows to keep the speed of light constant. The full explanation — and one for every question — is in Pro.
Practise this section
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.