Extra exam question E5D02
Subelement E5, ELECTRICAL PRINCIPLES· Group E5D
Why is it important to keep lead lengths short for components used in circuits for VHF and above?
- A.To increase the thermal time constant
- B.To minimize inductive reactance (correct answer)
- C.To maintain component lifetime
- D.All these choices are correct
WhyLead lengths are kept short in VHF-and-above circuits mainly to minimize inductive reactance. Keeping lead lengths short in VHF-and-above circuits matters because even a short length of wire has meaningful inductive reactance at these frequencies, and that stray inductance can significantly detune a circuit or add unwanted impedance if the leads are any longer than necessary, answer B. It has nothing to do with thermal time constants or component lifetime, those aren't affected by lead length in this way.
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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