Meters and troubleshootingQuestion 724 of 1506

Which test instrument shows a graph of voltage over time?

  1. A megohmmeter
  2. A clamp-on ammeter
  3. An analog ohmmeter
  4. An oscilloscope
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Correct answer: An oscilloscope

An oscilloscope draws the waveform, which helps when levels change quickly.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 8.1: What is a Meter?

Practice meters and troubleshooting

Questions last reviewed: 18 October 2026