Basic Qualification · B-005 Basic electronics and theory · B-005-007-006
What happens to a signal's wavelength as its frequency increases?
- A It decreases proportionally to frequency squared
- B It increases proportionally to frequency squared
- C It decreases
- D It increases
Correct answer: C — It decreases. From the official ISED question bank, verified word for word.
Why
When a radio wave's frequency goes up, the distance between its peaks, called the wavelength, must get shorter because the speed of light stays 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.