Basic Qualification · B-005 Basic electronics and theory · B-005-009-002
If two equal-value inductors are connected in parallel, what is their total inductance?
- AHalf the value of one inductor
- BTwice the value of one inductor
- CThe value of one inductor times 4
- DThe value of one inductor divided by 4
Correct answer: A — Half the value of one inductor. From the official ISED question bank, verified word for word.
Why
When two inductors of the same size are wired in parallel, the electrical current has two paths to flow through instead of one, which makes it easier for the magnetic field to build up and effectively cuts the total opposition to change in half. The full explanation — and one for every question — is in Pro.
Practise this section
Basic electronics and theory is section B-005 of the Basic exam: 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.
Drill B-005 — free, no account