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    Physics for Scientists
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    Exam 34: Electromagnetic Waves
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    A Solar Cell Has a Light-Gathering Area of 10 Cm<sup>2</sup>
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A Solar Cell Has a Light-Gathering Area of 10 Cm2

Question 20

Question 20

Multiple Choice

A solar cell has a light-gathering area of 10 cm2 and produces 0.2 A at 0.8 V (DC) when illuminated with S = 1 000 W/m2 sunlight. What is the efficiency of the solar cell?


A) 16%
B) 7%
C) 23%
D) 4%
E) 32%

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