Meters and troubleshootingQuestion 686 of 1506

A digital voltmeter has its red lead on point c and its black lead on point d. Which notation is the reading?

  1. Edc
  2. Ec/d
  3. Ec+d
  4. Ecd
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Correct answer: Ecd

A double subscript gives the first point measured against the second point: red lead on the first, black lead on the second.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 6.2: Kirchhoff’s Voltage Law (KVL)

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Questions last reviewed: 18 October 2026