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Power and efficiency

Power and efficiency

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Question 4

Which of the following changes would reduce the rate of unwanted thermal energy transfer from a hot water tank to its surroundings?

A

Painting the tank's outer surface with a dull black finish

B

Adding a layer of thermal insulation around the tank

C

Decreasing the thickness of the tank's walls

D

Increasing the temperature of the water inside the tank

Markscheme

Power and efficiency Questions

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

37 exam-style questions on OCR GCSE Physics Power and efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

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