Chapter - 5 Sources of Energy

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Sources of Energy


What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited utility?


Advantages of using solar cooker :

  1. The use of solar cooker for cooking food saves precious fuels like coal, kerosene and LPG.
  2. The use of solar cooker does not produce smoke due to which it does not pollute the air.
  3. When food is cooked in a solar cooker, its nutrients do not get destroyed. This is because, in a solar cooker, food is cooked at a comparatively lower temperature.
  4. In a solar cooker, up to four food items can be cooked at the same time.

Disadvantages of using solar cooker :

  1. The solar cooker cannot be used to cook food during the night because sunshine is not available at that time.
  2. If the day sky is covered with clouds, even then solar cooker cannot be used to cook food.
  3. The direction of the reflector of solar cooker has to be changed from time-to-time to keep it facing the sun.
  4. The box-type solar cooker cannot be used for baking (making chappatis, etc.) or for frying.

The places that receive rain most of the year or where the sky remains cloudy, the solar cooker has limited utility.

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