Answer :

In hydroelectric power plants, the electric energy is produced by potential energy of the water at a certain height , and potential energy increases with the increase of height of the water.

When water is taken at some height it gains potential energy and when water from this height is thrown the potential energy of the water starts converting into kinetic energy and when the water hits the turbine the kinetic energy rotates the turbine and hence the electricity or electric energy is generated by conversion.

The more is the height of the water, the more is the potential energy, the more is the kinetic energy and , hence the more is the electric energy.

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