Red Seal Electrician Practice
DC circuitsQuestion 1331 of 1506

A current of 6 A flows in a 2 Ω heating element. How much power does the element dissipate?

  1. 36.0 W
  2. 12.0 W
  3. 24.0 W
  4. 72.0 W
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Correct answer: 72.0 W

P = I² × R = (6 A)² × 2 Ω = 72.0 W.

Source: Computed, 2.4: Calculating Electric Power

Practice dc circuits

Questions last reviewed: 18 October 2026