Basic Qualification · B-005 Basic electronics and theory · B-005-009-002
Si deux bobines de valeur égale sont reliées en parallèle, quelle sera la valeur totale de l'inductance?
- ALa valeur d'une bobine divisée par 4
- BLa moitié de la valeur d'une bobine
- CLe double de la valeur d'une bobine
- DLa valeur d'une bobine multipliée par 4
Correct answer: B — La moitié de la valeur d'une bobine. Question tirée de la banque officielle d'ISDE.
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