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प्रश्न
What kind of energy transformation take place at a hydroelectric power station?
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उत्तर
At a hydroelectric power station, a dam is built on a river. The water collected in a reservoir has lots of gravitational potential energy. The kinetic energy of the falling water is used to drive huge turbines, which are connected to the electric generator. This energy transformation can be shown as,
Gravitational potential energy > Kinetic energy > Electrical energy
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