DC circuitsQuestion 566 of 1506

What is the formula for electric power in terms of voltage and current?

  1. P = I x E
  2. P = E / I
  3. P = I / E
  4. P = E + I
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Correct answer: P = I x E

Power is the product of voltage and current.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 2.3: Power in Electric Circuits

Practice dc circuits

Questions last reviewed: 18 October 2026