Advanced Qualification · A-004 Power supplies · A-004-001-007
La fréquence d'ondulation produite par un bloc d'alimentation à simple alternance branché sur le courant domestique est :
- A90 Hz
- B120 Hz
- C30 Hz
- D60 Hz
Correct answer: D — 60 Hz. Question tirée de la banque officielle d'ISDE.
Why
In Canada, the household electricity supply alternates direction 60 times every second, which is called 60 Hz. 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