Advanced Qualification · A-001 Advanced theory · A-001-001-007
Au moment de la décharge, à quel pourcentage de la tension initiale le condensateur d'un circuit RC sera-t-il rendu après deux constantes de temps?
- A13,5 %
- B36,8 %
- C86,5 %
- D63,2 %
Correct answer: A — 13,5 %. Question tirée de la banque officielle d'ISDE.
Why
After two time constants, a capacitor in an RC circuit has lost about 86.5% of its starting voltage, leaving only 13.5% remaining. 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.
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