Basic Qualification · B-005 Basic electronics and theory · B-005-001-003
Combien de hertz égalent 1 kHz?
- A100 Hz
- B10 000 Hz
- C1 000 Hz
- D10 Hz
Correct answer: C — 1 000 Hz. Question tirée de la banque officielle d'ISDE.
Why
One kilohertz equals exactly 1 000 hertz because the prefix "kilo" always means one thousand in the metric system, just as a kilometre is 1 000 metres. 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