Extra exam question E4E08
Subelement E4, AMATEUR PRACTICES· Group E4E
What current flows equally on all conductors of an unshielded multiconductor cable?
- A.Differential-mode current
- B.Common-mode current (correct answer)
- C.Reactive current only
- D.Magnetically-coupled current only
WhyCommon-mode current flows equally on all conductors of an unshielded multiconductor cable. Common-mode current is current that flows equally, in the same direction, on every conductor of an unshielded multiconductor cable at once, as opposed to differential-mode current, which flows in opposite directions on a pair of conductors as part of the intended signal, answer B. "Reactive current only" and "magnetically-coupled current only" aren't standard terms describing this shared, same-direction current on all the conductors together.
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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