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8.3 Power and efficiency

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Question 19

An energy meter records that an electric drill draws 18 000 J18\,000\ \text{J}18000 J from its battery while making one hole.

During this task, the drill transfers 11 700 J11\,700\ \text{J}11700 J usefully to the rotating drill bit.

Calculate the proportion of the battery's energy that the drill transfers usefully during this task.

[2]
Markscheme

8.3 Power and efficiency Questions

  1. GCSE
  2. /Physics
  3. /8.3 Power and efficiency

128 exam-style questions on Edexcel GCSE Physics 8.3 Power and efficiency, covering 8.3.1 Power and 8.3.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

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