Basic Qualification · B-005 Basic electronics and theory · B-005-011-006
La tension induite dans une bobine est maximale quand:
- Ale courant circulant dans la bobine est un courant continu
- Ble taux de variation du courant est minimal
- Cle champ magnétique entourant la bobine est stable
- Dle taux de variation du courant est maximal
Correct answer: D — le taux de variation du courant est maximal. Question tirée de la banque officielle d'ISDE.
Why
Voltage is induced in a coil only when the magnetic field around it changes, and that field changes fastest when the electric current flowing through the coil changes most rapidly. 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