Basic Qualification · B-005 Basic electronics and theory · B-005-002-010
The resistance of a conductor changes with:
- A temperature
- B voltage
- C current
- D humidity
Correct answer: A — temperature. From the official ISED question bank, verified word for word.
Why
When a metal wire gets hotter, its atoms vibrate more vigorously, making it harder for electrons to flow through, which increases resistance. 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.