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2014-08-19T19:22:37+05:30
SOLAR ENERGY::
Energy derived from the radiation of sun is known as solar energy.It is also known as radiant energy. The earth receives heat and light from the sun. The energy generated by the sun is enormous. It consists of heat radiations called infrared rays, ultraviolet rays and some gamma rays. The earth receives infrared rays and visible light, thus heating up the land-masses and waterbodies.
This energy can be used in cooking with the help of solar cooker, heating water using solar water heater, and in batteries using solar cell.
Plants also need solar energy to manufacture food through the process of Photosynthesis.
 
WIND ENERGY:
The convection current of air is called wind. It is caused by uneven heating of the earth surface by the Sun. Fast moving air possess Kinetic energy. the Kinetic energy can be used to rotate the blades of the windmill. The windmills have been used to pump water and grind grain since a long time. The modern day windmills are used to rotate turbines of electric generators to generate electricity.

HYDROELECTRICITY
The water is held up high by the dams. When the water is released it drives the turbines which rotates and generates electricity. Due to this sometimes the floods may occur in some regions.
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Thanks a lot Shravani83! Can you please explain in detail with the advantages, disadvantages,limitations and the process? As it is my Assignment for 20 marks i want to submit it in elaborated manner.
well sorry but i knew this much a really big sorry :/ :(
Ok No problem... Once agian Thank you for helping me :)
Can you please help me out from where can i find the solution of my topic?