CBSE Class 10 Science 2019 · Paper 31/4/3 · Question 2
List two merits of solar cells.
Answer
They cause no pollution and need very little maintenance.
(i) Solar cells use sunlight, a renewable source that is available free, and they cause no pollution while working.
(ii) They have no moving parts, so they need very little maintenance and have a long life.
Other merits that also earn credit: they work without any focussing device, and they can be set up in remote places where laying power transmission lines is expensive.
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