Electrical mathQuestion 1000 of 1506

What is the resonant frequency of a tank circuit with L = 0.1 H and C = 2.5 µF? (f = 1/(2π√(LC)))

  1. 159 Hz
  2. 637 Hz
  3. 2000 Hz
  4. 318 Hz
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Correct answer: 318 Hz

LC = 0.1 × 0.0000025 = 2.5 × 10⁻⁷. √LC = 0.0005. f = 1/(2π × 0.0005) = 318 Hz.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 6.2: Simple Parallel (Tank Circuit) Resonance

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Questions last reviewed: 18 October 2026