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?
- A The value of one inductor divided by 4
- B Twice the value of one inductor
- C Half the value of one inductor
- D The 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
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.