Advanced Qualification · A-001 Advanced theory · A-001-001-010
Quelle est la constante de temps d'un circuit dont le condensateur, d'une valeur de 220 microfarads, est en série avec une résistance de 470 kilohms?
- A470 secondes
- B220 secondes
- C103 secondes
- D470 000 secondes
Correct answer: C — 103 secondes. Question tirée de la banque officielle d'ISDE.
Why
The time constant equals 103 seconds because you multiply the resistance of 470 kilohms by the capacitance of 220 microfarads, converting the units so they cancel out to leave seconds. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced theory is section A-001 of the Advanced exam: Advanced theory: time constants, reactance, impedance, resonance, Q, and the mathematics behind tuned circuits.
Drill A-001 — free, no account