Basic Qualification · B-005 Basic electronics and theory · B-005-001-003
How many hertz is 1 kHz?
- A 10 000 Hz
- B 1 000 Hz
- C 10 Hz
- D 100 Hz
Correct answer: B — 1 000 Hz. From the official ISED question bank, verified word for word.
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
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.