DC circuitsQuestion 562 of 1506

What is 1 volt defined as?

  1. 1 coulomb per second
  2. 1 joule per second
  3. 1 joule of energy per coulomb of charge
  4. 1 ohm times 1 watt
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Correct answer: 1 joule of energy per coulomb of charge

A 9 V battery releases 9 joules per coulomb moved.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 2.1: Ohm’s Law - How Voltage, Current, and Resistance Relate

Practice dc circuits

Questions last reviewed: 18 October 2026