Advanced Qualification · A-003 Measurements · A-003-001-002
Quelle est la valeur efficace ("RMS") de la tension d'une onde sinusoïdale dont la tension de crête à crête est de 340 volts?
- A120 volts
- B170 volts
- C240 volts
- D300 volts
Correct answer: A — 120 volts. Question tirée de la banque officielle d'ISDE.
Why
To find the root mean square, or RMS, value which represents the equivalent direct current heating effect, you first divide the 340 volt peak-to-peak measurement by two to get the peak voltage of 170 volts. 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