Advanced Qualification · A-001 Advanced theory · A-001-001-006
Au moment de la charge, quel pourcentage de la tension appliquée le condensateur d'un circuit RC atteint-il après deux constantes de temps?
- A86,5 %
- B63,2 %
- C95 %
- D36,8 %
Correct answer: A — 86,5 %. Question tirée de la banque officielle d'ISDE.
Why
After two time constants, the capacitor in an RC circuit reaches 86.5% of the supply voltage because it charges rapidly at first and then slows down, gaining about 63.2% of the remaining gap during each time interval. 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