Advanced Qualification · A-001 Advanced theory · A-001-003-001
Quelle est la fréquence de résonance d'un circuit RLC en série si R = 47 ohms, L = 50 microhenrys et C = 40 picofarads?
- A3,56 MHz
- B1,78 MHz
- C7,96 MHz
- D79,6 MHz
Correct answer: A — 3,56 MHz. Question tirée de la banque officielle d'ISDE.
Why
The resonant frequency of 3.56 MHz is correct because it is the specific point where the inductive and capacitive reactances cancel each other out in a series circuit, leaving only the resistance to limit the current. 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