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Mention why is it not possible to make u...

Mention why is it not possible to make use of solar cells to meet all our energy needs. State three reasons to support your answer. Also mention three uses of solar cells.

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Artiflicial satellites, wireless transmission system, calculators.
a] Availability of special grades of silicon used for making solar cells is limited.
b] Silver is used for the interconnection of the cells in the panel which adds to its cost.
c] Low efficiency of solar cells is another reason.
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  13. Define nuclear fission.

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