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Question
State the advantages and disadvantages of using solar cells.
Solution
The advantages of solar cells are that they do not have moving parts, they require no maintenance and they work with any kind of light-focussing devices. Moreover, they can be used even in remote areas.
The disadvantages of solar cells are that they require an expensive special grade of silicon or silver wire, they have low efficiency and they convert only 25 per cent of light falling on them into electricity.
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