Basic Qualification · B-005 Basic electronics and theory · B-005-011-011
What confirms the fact that the transfer of energy from the primary to the secondary of a transformer is not perfect?
- A Warm iron laminations
- B Noisy operation
- C Large secondary current
- D High primary voltage
Correct answer: A — Warm iron laminations. From the official ISED question bank, verified word for word.
Why
When electricity flows through a transformer, some energy turns into heat inside the metal core instead of moving to the output. 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.