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sources of energy — Science STD 10 — Question

Gujarat BoardEnglish MediumSTD 10Sciencesources of energy4 Marks
Question
Explain in detail: Hydropower plants
✓

Answer

 
  • Hydropower plants convert the potential energy of falling water into electricity.
  • A quarter of our energy requirement is met by hydropower plants.
  • Hydropower plants are mainly associated with dams.
  • In order to produce hydel electricity high-rise dams are Constructed on the river.
  • The flow of water is obstructed and thereby water is collected in larger reservoirs.
  • The water level rises and the kinetic energy of flowing water gets transformed into potential energy.
  • The water from the upper levels in the dam is carried to the turbine at the bottom of the dam through the pipes.
  • As turbine rotates electricity is generated.
  • Advantages:
  • It is a non-polluting source of energy.
  • It is a renewable resource of energy because water in the reservoir would be refilled each time it rains.
  • Disadvantages:
  • Dams can be constructed in a hilly terrains and it is highly expensive.
  • Large area of agricultural land and human habitation are submerged.
  • Large eco-systems are destroyed.
  • It creates the problem of satisfactory rehabilitation of displaced people.

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