Question

How is hydroelectric power created?

Answer 1

Water is stored in dam and its reservoir.

Explanation:

THe power station is many meters below.So the water in the dam have potential energy.This water is applied to turbine blades and turbine rotates,This is coupled to generator which converts the mechanical energy of turbine into electrical energy .
picture credit dscience how stuff wwworks.com

Answer 2

power is produced from the potential energy of water stored at a height.

Explanation:

A dam is built across the river where there is huge storage capacity..This water is brought to down stream by huge peenstock pipes or, tunnel and used to run a turbine.Turbine runs the generator which convert mechanical energy into electrical energy.
picture credit howscience stuff works.com.