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AQA · GCSE · Physics

Power and efficiency
Practice Questions

40 AQA GCSE Physics questions on Power and efficiency, each with instant feedback and a full examiner-style mark scheme.

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✨ Revision guide includes key terms, worked examples and exam technique for Power and efficiency.

Try 2 sample questions on Power and efficiency

Question 1 · 1 mark · Difficulty 1/3

What is one watt equal to?

  1. One joule per second
  2. One joule multiplied by one second
  3. One joule per metre
  4. One newton per second
Show answer & explanation
✓ Answer: AOne joule per second
The unit itself shows that power is an energy divided by a time.
Question 2 · 1 mark · Difficulty 1/3

Two devices each transfer 100 J. One takes 1 s and the other takes 10 s. Which is more powerful?

  1. The one that takes 10 s
  2. The one that takes 1 s
  3. Neither has any power
  4. They have equal power
Show answer & explanation
✓ Answer: BThe one that takes 1 s
Power is about how quickly energy is transferred, not how much is transferred in total.
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20 questions · 25 min · free

AQA GCSE Physics: Power and efficiency FAQ

Is Kramizo free for AQA GCSE students preparing for Physics?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Power and efficiency practice with other Physics topics or even switch to a totally different AQA subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Power and efficiency questions aligned to the official AQA GCSE Physics syllabus?
Every question is written against the published AQA GCSE Physics specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real AQA paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from AQA.
How is Power and efficiency typically tested on AQA GCSE Physics papers?
Power and efficiency appears across multiple question types on real AQA GCSE Physics papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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