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3.2 Dissipation and efficiency

3.2 Dissipation and efficiency

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Question 19

An electric kettle is 80% efficient. When heating water, it transfers 180 000 J of useful thermal energy to the water.

Calculate the total energy that must be supplied to the kettle.

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3.2 Dissipation and efficiency Questions

  1. GCSE
  2. /Physics
  3. /3.2 Dissipation and efficiency

38 exam-style questions on Edexcel GCSE Physics 3.2 Dissipation and efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

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