Red Seal Electrician Practice
DC circuitsQuestion 1334 of 1506

A current of 6 A flows in a 30 Ω heating element. How much power does the element dissipate?

  1. 5400 W
  2. 540 W
  3. 180 W
  4. 1080 W
Show answer

Correct answer: 1080 W

P = I² × R = (6 A)² × 30 Ω = 1080 W.

Source: Computed, 2.4: Calculating Electric Power

Practice dc circuits

Questions last reviewed: 18 October 2026