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Discuss two uses of photoelectric cells...

Discuss two uses of photoelectric cells

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What is a photoelectric cell?

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This question has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement- I: Caesium is used in photoelectric cells. Statement - II : Caesium is most electropositive element.

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What type of metals are used in photoelectric cells? Give one example.

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Why are potassium and cesium, rather than lithium used in photoelectric cells?