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1.7 Energy, work and power

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Question 283

The flow diagram shows the transfer of energy in a hydroelectric power plant:

falling water→rotates turbine→rotates generator→transmission lines \text{falling water} \rightarrow \text{rotates turbine} \rightarrow \text{rotates generator} \rightarrow \text{transmission lines} falling water→rotates turbine→rotates generator→transmission lines

What are the processes for the transfer of energy between the turbine and the generator, and between the generator and the transmission lines?

A

Turbine to generator: electrical working; Generator to transmission lines: mechanical working

B

Turbine to generator: mechanical working; Generator to transmission lines: electrical working

C

Turbine to generator: mechanical working; Generator to transmission lines: heating by thermal conduction

D

Turbine to generator: heating by thermal conduction; Generator to transmission lines: 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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