(C) Nuclear energy
5. What are the limitations of harnessing the wind energy?
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falarining and toasters are made ofan alloy
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(i) It can be used only at those places where wind blows for the greater part of the year. (ii) Wind speed should be higher than 15 km/h to rotate the turbine at the required speed. (iii) Need of a back up facility when there is no wind. (iv) Requires large area for setting up wind energy farms.
Coils of electric toasters and electric irons made of an alloy rather than a pure metal due to the following reasons: The resistivity of an alloy is higher than the pure metal. At high temperatures, the alloys do not oxidize. Alloy does not melt readily and get deformed.
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