Advanced Qualification · A-003 Measurements · A-003-001-011
Une onde sinusoïdale dont la crête de tension est de 17 volts équivaut à quelle tension efficace ("RMS")?
- A12 volts
- B24 volts
- C34 volts
- D8,5 volts
Correct answer: A — 12 volts. Question tirée de la banque officielle d'ISDE.
Why
To find the root mean square, or RMS, value of a sine wave, you multiply the peak voltage by roughly 0.707. The full explanation — and one for every question — is in Pro.
Practise this section
Measurements is section A-003 of the Advanced exam: Measurements: meters, oscilloscopes, counters, signal generators, and what a reading actually tells you.
Drill A-003 — free, no account