Basic Qualification · B-005 Basic electronics and theory · B-005-011-009
When is coupling (induction) between two wires maximum?
- A When the wires are separated and at right angles
- B When the wires are close and parallel
- C When the wires are close and at right angles
- D When the wires are separated and parallel
Correct answer: B — When the wires are close and parallel. From the official ISED question bank, verified word for word.
Why
Induction happens when a changing current in one wire creates a magnetic field that pushes electrons in a nearby wire. 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.