Meters and troubleshootingQuestion 728 of 1506

What is an analog signal?

  1. A signal that is always zero
  2. A signal that varies continuously over its range
  3. A signal with only a few fixed steps
  4. A signal that only has two states
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Correct answer: A signal that varies continuously over its range

An analog signal can take any value in its range. A digital signal moves in steps.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 9.1: Analog and Digital Signals

Practice meters and troubleshooting

Questions last reviewed: 18 October 2026