Extra exam question E6D02
Subelement E6, CIRCUIT COMPONENTS· Group E6D
What is the equivalent circuit of a quartz crystal?
- A.Series RLC in parallel with a shunt C representing electrode and stray capacitance (correct answer)
- B.Parallel RLC, where C is the parallel combination of resonance capacitance of the crystal and electrode and stray capacitance
- C.Series RLC, where C is the parallel combination of resonance capacitance of the crystal and electrode and stray capacitance
- D.Parallel RLC, where C is the series combination of resonance capacitance of the crystal and electrode and stray capacitance
WhyA quartz crystal's equivalent circuit is a series RLC in parallel with a shunt capacitance representing electrode and stray capacitance. A quartz crystal's electrical equivalent circuit is a series RLC combination (representing the crystal's mechanical resonance) in parallel with a separate shunt capacitance representing the electrode plates and stray wiring capacitance around the crystal, answer A. The other options mix up which elements are in series versus parallel, or misplace the shunt capacitance relative to the resonant RLC branch, in ways that don't match how a real crystal actually behaves electrically.
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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