A 12 V battery drives a current of 3 A through a resistor. What is the resistance?

  1. 0.25 Ω
  2. 4 Ω
  3. 15 Ω
  4. 36 Ω
Answer

B) 4 Ω

R = V ÷ I = 12 ÷ 3 = 4 Ω.

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