Advanced Qualification · A-001 Advanced theory · A-001-003-011
Quel est la valeur de la capacité (C) dans un circuit RLC en série si la fréquence de résonance du circuit est 14,25 MHz et L = 2,84 microhenrys?
- A44 microfarads
- B2,2 picofarads
- C44 picofarads
- D2,2 microfarads
Correct answer: C — 44 picofarads. Question tirée de la banque officielle d'ISDE.
Why
At resonance, the inductive and capacitive effects cancel each other out, meaning the circuit behaves as if it only has resistance. 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