Advanced Qualification · A-003 Measurements · A-003-001-010
What is the peak-to-peak voltage of a sine wave that has an RMS voltage of 120 volts?
- A 204.8 volts
- B 339.5 volts
- C 84.8 volts
- D 169.7 volts
Correct answer: B — 339.5 volts. From the official ISED question bank, verified word for word.
Why
To find the peak-to-peak voltage, you first multiply the RMS value of 120 volts by 1.414 to get the peak voltage, which is about 169.7 volts. The full explanation — and one for every question — is in Pro.
Practise this section
Measurements: meters, oscilloscopes, counters, signal generators, and what a reading actually tells you.