GCSE Physics

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the sun heats the air , water and land on one side of the earth only , meanwhile the other side raidates heat into outer space . Convection currents are set up by this uneven heating . only a small proportion of solar radiation is converted into kinetic energy of the winds . The problem is :

converting this energy into useful work in a wind turbine . the wind turns blades on the windmill and this turns the turbine to generate electricity
what are the advantages of using wind power to generate electricity
- the windmills are large and costly
- there is a relatively low output , very large quantities of moving air are needed to allo the windmills to match the energies obtained by burning fossil fuels
- there is not enough wind in many areas , the amiunt of electricity produced by wind generators depends on the strenght of the wind that varies directly , meaning wind power isn't very reliable
- wind farms cause visual and noise pollution
a group of wind generators is called a :

wind farm
which type of energy is transferred from the wind to generate electricity

kinetic
where would you not expect to find a group of wind generators

in a city or in a valley

Author:	ghoran
ID:	147720
Card Set:	GCSE Physics
Updated:	2012-04-15 15:41:05
Tags:	methods we use generate electricity need finish
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Description:	gjbhm
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