Answer:
Importance: Hydro power
plants are of prime importance as about 25 per cent of our energy requirement
in India is met by hydro power plants.
(i) A high
rise dam is constructed at a suitable place on the river to obstruct the flow
of water and thereby, collect water in larger reservoirs. Due to rise in water
level the kinetic energy of flowing water is transformed into potential energy
of stored water.
(ii)
The water from the high level in the dam is carried through sluice gates and
pipes to the turbine of electric generator, which is fitted at the bottom of
the dam. Due to flowing water, turbine is rotated at a fast rate and hydel
electricity is produced.
(iii)
A hydro power plant converts the potential energy of falling/stored water into
electricity.
[CBSE Delhi
2008]
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