Basic Qualification · B-005 Basic electronics and theory · B-005-007-001
Quel terme désigne le nombre de cycles positif et négatif complétés en une seconde par un courant alternatif?
- ALe taux pulsatif
- BLa phase
- CLa fréquence
- DLa vitesse
Correct answer: C — La fréquence. Question tirée de la banque officielle d'ISDE.
Why
Frequency measures how many times an alternating current swings from positive to negative and back again in one second. 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