Question 4
In a hydro power plant
(a) Potential energy possessed by stored water is converted into electricity.
(b) Kinetic energy possessed by stored water is converted into potential energy.
(c) Electricity is extracted from water.
(d) Water is converted into steam to produce electricity.
Option (a) is correct.
In Hydro power plant water is held up at height. This gravitational potential energy is converted into kinetic energy when water is left to fall and thus hits the turbine with immense energy.