Advanced Qualification · A-001 Advanced theory · A-001-004-001
Quelle est la fréquence de résonance d'un circuit RLC parallèle si R = 4,7 kilohms, L = 1 microhenry et C = 10 picofarads?
- A15,9 MHz
- B50,3 MHz
- C15,9 kHz
- D50,3 kHz
Correct answer: B — 50,3 MHz. Question tirée de la banque officielle d'ISDE.
Why
The resonant frequency depends only on the inductor and capacitor values, not the resistor, so you plug 1 microhenry and 10 picofarads into the standard formula to find the result is 50.3 MHz. 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