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Question 232

What is the resonant frequency of an RLC circuit if R is 22 ohms, L is 50 microhenries, and C is 40 picofarads?

  1. 44.72 MHz
  2. 22.36 MHz
  3. 3.56 MHzCorrect answer
  4. 1.78 MHz

Explanation

Resonance occurs where the inductive and capacitive reactances are equal, which depends only on L and C; the 22 Ω resistance affects the Q and the bandwidth but not the resonant frequency. Substituting 50 µH and 40 pF gives about 3.56 MHz.

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Question 232: What is the resonant frequency of an RLC circuit if R is 22… · FCC Amateur Extra Class (Element 4) · Questena