Basic Qualification · B-005 Basic electronics and theory · B-005-002-004
What is the best conductor among the following materials?
- A Copper
- B Carbon
- C Silicon
- D Aluminum
Correct answer: A — Copper. From the official ISED question bank, verified word for word.
Why
Copper is the best conductor here because its atoms let electrons flow through them with very little resistance, making it the standard choice for wiring in homes and radios. 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.