DC circuitsQuestion 640 of 1506

Two 10 Ω heating elements are connected in parallel. What is the total resistance?

  1. 5 Ω
  2. 20 Ω
  3. 10 Ω
  4. 2.5 Ω
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Correct answer: 5 Ω

R = 1 / (1/10 + 1/10) = 1 / 0.2 = 5 Ω.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 5.3: Simple Parallel Circuits

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Questions last reviewed: 18 October 2026