Basic Qualification · B-005 Basic electronics and theory · B-005-007-011
Un signal est composé d'une fréquence fondamentale à 2 kHz et d'un autre signal à 4 kHz. Comment appelle-t-on le signal de 4 kHz?
- ASous-harmonique
- BIntermodulation
- CHarmonique
- DRepliement
Correct answer: C — Harmonique. Question tirée de la banque officielle d'ISDE.
Why
A harmonic is simply a frequency that is a whole-number multiple of a lower starting frequency, called the fundamental. 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