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3.2 Dissipation and efficiency

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Question 14

An electric motor is used to lift a package in a sorting facility.

The motor is supplied with 2500 J of electrical energy. The useful gravitational potential energy gained by the package as it is lifted is 950 J.

Calculate the efficiency of the electric motor.

[2]
Markscheme

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, covering 3.2.1 Dissipation of energy, 3.2.2 Reducing unwanted energy transfers, 3.2.3 Efficiency, and 3.2.4 Increasing efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

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