Advanced Qualification · A-001 Advanced theory · A-001-004-010
Quelle est la fréquence de résonance d'un circuit RLC parallèle si R = 4,7 kilohms, L = 90 microhenrys et C = 100 picofarads?
- A1,77 kHz
- B1,77 MHz
- C1,68 kHz
- D1,68 MHz
Correct answer: D — 1,68 MHz. Question tirée de la banque officielle d'ISDE.
Why
The resonant frequency is 1.68 MHz because the resistance value does not change where the inductor and capacitor cancel each other out; only the inductance of 90 microhenrys and capacitance of 100 picofarads matter for this calculation. 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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