Advanced Qualification · A-003 Measurements · A-003-001-005
In applying Ohm's law to AC circuits, current and voltage values are:
- A none of the proposed answers
- B peak values times 0.707
- C average values
- D average values times 1.414
Correct answer: B — peak values times 0.707. From the official ISED question bank, verified word for word.
Why
When using Ohm's law with alternating current, we need values that represent the same heating effect as a direct current, known as root mean square or RMS values. 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.