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1.7 Energy, work and power

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Question 116

In a hydroelectric power station, energy is transferred through a series of processes:

falling water→turns turbine→turns generator→transformer \text{falling water} \rightarrow \text{turns turbine} \rightarrow \text{turns generator} \rightarrow \text{transformer} falling water→turns turbine→turns generator→transformer

What are the pathways for the transfer of energy from the falling water to the turbine, and from the generator to the transformer, respectively?

A

mechanical working, mechanical working

B

electrical working, mechanical working

C

mechanical working, electrical working

D

heating by particles, electrical working

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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