Red Seal Electrician Practice
DC circuitsQuestion 849 of 1506

A charged capacitor is connected to a resistor. What does the capacitor do until its voltage reaches zero?

  1. It supplies current to the resistor, like a source.
  2. It draws current from the resistor, like a load.
  3. It blocks all current.
  4. It keeps its voltage constant.
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Correct answer: It supplies current to the resistor, like a source.

A falling capacitor voltage means it is giving energy back to the circuit.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 13.1: Electric Fields and Capacitance

Practice dc circuits

Questions last reviewed: 18 October 2026