Red Seal Electrician Practice
DC circuitsQuestion 545 of 1506

What is a direct current (DC)?

  1. Current that reverses direction often
  2. Current in one direction
  3. Current that stops and starts
  4. Current only in insulators
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Correct answer: Current in one direction

AC reverses direction. DC does not.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 1.4: Voltage and Current

Practice dc circuits

Questions last reviewed: 18 October 2026