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Electricity MCQs — Physics

2 multiple-choice questions on Electricity from Physics, each with the correct answer and, where available, a teacher's explanation. Read through them to revise the chapter, then practise the same questions one by one to test yourself.

1. Two 6 Ω resistors are connected in parallel. What is the combined resistance?

  1. 3 Ω
  2. 6 Ω
  3. 12 Ω
  4. 36 Ω

Answer: A) 3 Ω

Explanation: 1/R = 1/6 + 1/6 = 2/6, so R = 3 Ω. Equal resistors in parallel halve the resistance.

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2. 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

Explanation: R = V ÷ I = 12 ÷ 3 = 4 Ω.

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