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1.7 Energy, work and power

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Question 344

A loudspeaker is used to play music. Which energy change takes place in the loudspeaker?

A

input energy is sound, output energy is electrical

B

input energy is electrical, output energy is sound

C

input energy is electrical, output energy is chemical

D

input energy is chemical, output energy is electrical

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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