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8.3 Power and efficiency

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Question 38
F

An electric shower has a power of 9.0 kW.

A small lamp has a power of 9 W.

a.

Give the power of the shower in watts.

[1]
b.

State the energy transferred by the shower each second.

[1]
c.

The shower is used for 5.0 minutes.

Calculate the energy transferred by the shower.

[3]
d.

Calculate the time the lamp would need to be switched on to transfer the same energy as the shower transfers in 5.0 minutes.

Give your answer in hours.

[3]
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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