Basic Qualification · B-005 Basic electronics and theory · B-005-007-007
Qu'arrive-t-il à la fréquence d'un signal lorsque sa longueur d'onde diminue?
- AElle augmente
- BElle diminue
- CElle diminue proportionnellement au carré de la fréquence
- DElle augmente proportionnellement au carré de la fréquence
Correct answer: A — Elle augmente. Question tirée de la banque officielle d'ISDE.
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
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