Advanced Qualification · A-003 Measurements · A-003-001-008
An AC voltmeter is calibrated to read the:
- A peak value
- B effective value
- C peak-to-peak value
- D average value
Correct answer: B — effective value. From the official ISED question bank, verified word for word.
Why
An AC voltmeter is calibrated to read the effective value because this number tells you the same amount of work a direct current would do, making it the standard for measuring power in circuits. 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.