Red Seal Electrician Practice
DC circuitsQuestion 558 of 1506

A 120 V supply feeds a heater element of 24 ohms. What is the current?

  1. 0.2 A
  2. 2880 A
  3. 144 A
  4. 5 A
Show answer

Correct answer: 5 A

I = E / R = 120 V / 24 ohms = 5 A.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 2.1: Ohm’s Law - How Voltage, Current, and Resistance Relate

Practice dc circuits

Questions last reviewed: 18 October 2026