Advanced Science Primary 6 Energy

A hydro-electric power station uses falling water to turn a turbine connected to a generator. What is the energy conversion?

A Chemical potential energy → Kinetic energy → Electrical energy
B Electrical energy → Kinetic energy → Heat energy
C Kinetic energy → Electrical energy → Gravitational potential energy
D Gravitational potential energy → Kinetic energy → Electrical energy
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Worked Solution

Step 1: Water at a height has GPE. Step [2-9]: As it falls, GPE converts to kinetic energy of the moving water and the turbine. Step [2-9]: The generator converts the kinetic energy into electrical energy.

Correct answer: Gravitational potential energy → Kinetic energy → Electrical energy

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