Red Seal Electrician Practice
DC circuitsQuestion 1333 of 1506

A current of 6 A flows in a 25 Ω heating element. How much power does the element dissipate?

  1. 450 W
  2. 300 W
  3. 900 W
  4. 150 W
Show answer

Correct answer: 900 W

P = I² × R = (6 A)² × 25 Ω = 900 W.

Source: Computed, 2.4: Calculating Electric Power

Practice dc circuits

Questions last reviewed: 18 October 2026