Red Seal Electrician Practice
Electrical mathQuestion 360 of 1506

A heater is rated 1,800 W on a 120 V supply. What current does it draw?

  1. 15 A
  2. 0.067 A
  3. 7.5 A
  4. 216 A
Show answer

Correct answer: 15 A

I = P ÷ E = 1,800 W ÷ 120 V = 15 A.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 1.2: Electrical circuits and units of measurement

Practice electrical math

Questions last reviewed: 18 October 2026