Basic Qualification · B-005 Basic electronics and theory · B-005-007-004
Electrical energy at a frequency of 7125 kHz is in what frequency range?
- A Medium frequency (MF)
- B Very High Frequency (VHF)
- C High Frequency (HF)
- D Low Frequency (LF)
Correct answer: C — High Frequency (HF). From the official ISED question bank, verified word for word.
Why
7125 kHz equals 7.125 megahertz, which sits squarely inside the High Frequency band that spans from 3 to 30 megahertz. 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.