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1.7 Energy, work and power

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Question 27

Which row gives the main energy transfer in an electric motor and the main energy transfer in a microphone?

A

Electric motor: kinetic to electrical; Microphone: sound to electrical

B

Electric motor: electrical to kinetic; Microphone: electrical to sound

C

Electric motor: electrical to kinetic; Microphone: sound to electrical

D

Electric motor: kinetic to electrical; Microphone: electrical to sound

Markscheme

1.7 Energy, work and power Questions

  1. IGCSE
  2. /Physics
  3. /1.7 Energy, work and power

533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.

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