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8.3 Power and efficiency

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Question 17

An electric drill has a useful power output of 450 W.

How long does the drill take to do 18 000 J18\,000\ \mathrm{J}18000 J of useful work?

[1]
A

0.025 s0.025\ \mathrm{s}0.025 s

B

8 100 000 s8\,100\,000\ \mathrm{s}8100000 s

C

400 s400\ \mathrm{s}400 s

D

40 s40\ \mathrm{s}40 s

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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