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A typical photovoltaic cell delivers 4.2×10−3 W of electric energy when illuminated with 0.14 W of...

A typical photovoltaic cell delivers 4.2×10−3 W of electric energy when illuminated with 0.14 W of light energy. What is the efficiency?

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Answer #1

efficiency = (electric energy delivered*100)/light energy given

(0.0042*100)/0.14=3%

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