Advanced Qualification · A-001 Advanced theory · A-001-004-004
Quelle est la fréquence de résonance d'un circuit RLC parallèle si R = 4,7 kilohms, L = 2 microhenrys et C = 30 picofarads?
- A2,65 MHz
- B2,65 kHz
- C20,5 kHz
- D20,5 MHz
Correct answer: D — 20,5 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 plugging 2 microhenrys and 30 picofarads into the standard formula yields 20.5 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.
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