Extra exam question E5A07
Subelement E5, ELECTRICAL PRINCIPLES· Group E5A
What is the magnitude of the current at the input of a parallel RLC circuit at resonance?
- A.Minimum (correct answer)
- B.Maximum
- C.R/L
- D.L/R
WhyThe current at the input of a parallel RLC circuit at resonance is at a minimum. Because a parallel RLC circuit's impedance peaks at resonance, the current drawn at its input from the driving source is at a minimum right at that resonant frequency, even as current continues circulating vigorously within the tank circuit itself, answer A. It isn't at a maximum, and the R/L and L/R ratios given aren't what determines input current magnitude at resonance.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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