Basic Qualification · B-005 Basic electronics and theory · B-005-009-001
If two equal-value inductors are connected in series, what is their total inductance?
- AThe value of one inductor divided by 4
- BTwice the value of one inductor
- CHalf the value of one inductor
- DThe value of one inductor times 4
Correct answer: B — Twice the value of one inductor. From the official ISED question bank, verified word for word.
Why
When two equal inductors are placed in series, their magnetic fields add together, making the total opposition to changing current simply the sum of both parts. 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