Basic Qualification · B-005 Basic electronics and theory · B-005-004-007
Si un courant de 0,44 ampère traverse une résistance de 50 ohms, quelle tension apparaît à ses bornes?
- A222 volts
- B2,2 volts
- C0,22 volt
- D22 volts
Correct answer: D — 22 volts. Question tirée de la banque officielle d'ISDE.
Why
To find the voltage across the resistor, you multiply the current by the resistance, a rule known as Ohm's Law. 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