Write the energy conversion that takes place in a hydropower plant.

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answer is D.

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Detailed Solution

Concept: When compared to other energy sources, a hydropower plant generates electricity from the water that is held behind a dam. The most effective way to create electricity is through hydropower conversion.
The hydropower plant rotates a turbine using the potential energy of the water stored in the dam. The force of the water falling is transformed into electrical energy. A turbine first transforms the kinetic energy into mechanical energy, which is then transformed into electrical energy by a generator. During times of low demand, water is pumped uphill into reservoirs, where it is then released for a generation during times of high need.
Thus, potential energy to kinetic energy is converted into usable energy in hydroelectric plants. followed by the transformation of kinetic energy into mechanical energy, which is eventually transformed into electrical energy.
Hence, the correct option is 4.

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