Basic Qualification · B-005 Basic electronics and theory · B-005-005-002
Vous branchez quatre résistances de 100 ohms en parallèle sur une batterie de 12 volts. Combien de milliampères sont consommés?
- A120 mA
- B240 mA
- C480 mA
- D48 mA
Correct answer: C — 480 mA. Question tirée de la banque officielle d'ISDE.
Why
When four identical 100-ohm resistors sit side by side in parallel, the total resistance drops to 25 ohms because the electricity has four paths to flow through instead of one. 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