Basic Qualification · B-005 Basic electronics and theory · B-005-011-010
A permanent magnet would most likely be made from:
- A brass
- B steel
- C copper
- D aluminum
Correct answer: B — steel. From the official ISED question bank, verified word for word.
Why
Steel holds a magnetic field well because its internal structure allows tiny magnetic regions to align and stay that way, creating a permanent magnet. 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.