8. What are the qualities of an ideal source of energy?
9. What are the advantages and disadvantages of using a solar cooker? Are there
places where solar cookers would have limited utility?
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8.The qualities of an ideal source of energy:
It should give a huge amount of energy per unit.
It should be pollution-free.
It should be more economical.
It must be easy to handle.
It must be capable to supply over a large period of time.
It should be low in cost.
It has a high calorific value.
It should produce less smoke.
9.Disadvantage of a solar cooker is that it is very expensive. It does not work without sunlight. Hence, on cloudy day, it becomes useless. The places where the days are too short or places with cloud covers round the year, have limited utility for solar cooker.
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