Advanced Qualification · A-007 Feedlines and matching · A-007-004-010
Dans un dipôle demi-onde, où trouve-t-on le courant minimal?
- AAu centre
- BIl est égal partout
- CÀ l'extrémité droite
- DAux deux extrémités
Correct answer: D — Aux deux extrémités. Question tirée de la banque officielle d'ISDE.
Why
In a half-wave dipole, the electrical current must stop flowing at the very tips because there is nowhere else for the electrons to go, creating a point of zero or minimum current at each end. The full explanation — and one for every question — is in Pro.
Practise this section
Feedlines and matching is section A-007 of the Advanced exam: Feedlines and matching at the advanced level: transmission line theory, impedance transformation, stubs and matching networks.
Drill A-007 — free, no account