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8.3 Power and efficiency

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Question 15

An electric iron transfers 720 kJ of energy while working at a power of 2.0 kW. What is the operating time?

[1]
A

6.0 minutes6.0\ \mathrm{minutes}6.0 minutes

B

360 minutes360\ \mathrm{minutes}360 minutes

C

24 minutes24\ \mathrm{minutes}24 minutes

D

6000 minutes6000\ \mathrm{minutes}6000 minutes

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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