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Advanced Qualification · A-004 Power supplies · A-004-001-006

La fréquence d'ondulation produite par un bloc d'alimentation à double alternance branché sur le courant domestique est :

  1. A120 Hz
  2. B60 Hz
  3. C90 Hz
  4. D30 Hz

Correct answer: A — 120 Hz. Question tirée de la banque officielle d'ISDE.

Why

In Canada, household electricity alternates 60 times per second, creating a 60 Hz cycle. The full explanation — and one for every question — is in Pro.

Practise this section

Power supplies is section A-004 of the Advanced exam: Power supplies: rectifiers, filtering, regulation, switching supplies and their failure modes.

Drill A-004 — free, no account

This question in English · All A-004 questions