DC circuitsQuestion 1320 of 1506

A 120 V heater draws 5 A. What is its resistance?

  1. 115 Ω
  2. 24.0 Ω
  3. 41.6 Ω
  4. 600 Ω
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Correct answer: 24.0 Ω

R = V ÷ I = 120 V ÷ 5 A = 24.0 Ω.

Source: Computed, 2.1: Ohm’s Law - How Voltage, Current, and Resistance Relate

Practice dc circuits

Questions last reviewed: 18 October 2026