DC circuitsQuestion 550 of 1506

What is the state of a switch that allows current to flow?

  1. Open
  2. Closed
  3. Bypassed
  4. Isolated
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Correct answer: Closed

Closed means contacts touching, giving continuity.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 1.5: Resistance

Practice dc circuits

Questions last reviewed: 18 October 2026