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sources of energy — Science STD 10 — Question

Gujarat BoardEnglish MediumSTD 10Sciencesources of energy4 Marks
Question
Write a short note: Wind energy
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Answer

 
  • Unequal heating of the landmass and water bodies by solar radiation generates air movement and causes wind to blow.
  • This kinetic energy of the wind can be used to do work.
  • Wind energy was harnessed by windmills in the past to do mechanical work.
  • The rotator motion of wind-mill was utilised to lift water from a well in a water lifting pump.
  • Today, wind energy is used to generate electricity.
  • A windmill essentially consists of a structure similar to a large electric fan that is erected at some height on a rigid support.
  • The rotatory motion of the windmill is used to turn the turbine of the electric generator to generate electricity.
  • The output of a single windmill is quite small and cannot be used for commercial purposes.
  • Therefore, a number of windmills are erected over a large area, which is known as wind energy farm.
  • The energy output of each windmill in a farm is coupled together to get electricity on a commercial scale.

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