DC circuitsQuestion 300 of 1506

A 6 Ω resistor and a 12 Ω resistor are connected in parallel. What is the total resistance?

  1. 9 Ω
  2. 18 Ω
  3. 72 Ω
  4. 4 Ω
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Correct answer: 4 Ω

RT = 1 ÷ (1/6 + 1/12) = 1 ÷ 0.25 = 4 Ω.

Source: Troubleshooting Motors and Controls (Dickson-Self), 1.2: Electrical Fundamentals

Practice dc circuits

Questions last reviewed: 18 October 2026