Advanced Qualification · A-001 Advanced theory · A-001-002-002
Comment s'appelle l'effet produit lorsque le courant RF circule près de la surface du conducteur?
- AL'effet piézo-électrique
- BL'effet de résonance
- CL'effet de couche
- DL'effet pelliculaire ("skin effect")
Correct answer: D — L'effet pelliculaire ("skin effect"). Question tirée de la banque officielle d'ISDE.
Why
At high radio frequencies, electrical current tends to crowd near the outer edge of a wire rather than flowing through its entire cross-section, a phenomenon known as the skin effect. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced theory is section A-001 of the Advanced exam: Advanced theory: time constants, reactance, impedance, resonance, Q, and the mathematics behind tuned circuits.
Drill A-001 — free, no account