A solar panel is used to recharge a battery. The solar panel produces 0.80 W of electrical power. The panel is 20% efficient. What is the po

Question

A solar panel is used to recharge a battery. The solar panel produces 0.80 W of electrical power. The panel is 20% efficient. What is the power input of the sunlight onto the solar panel? * 1 point 0.16 W 4.0 W 8.0 W 16.0 W

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Bơ 6 months 2021-07-16T16:30:24+00:00 1 Answers 34 views 0

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  1. dangkhoa
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    2021-07-16T16:31:27+00:00
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    Answer:

    Input power, Ip = 4 Watts

    Explanation:

    Given the following data;

    Power output = 0.8 Watts

    Efficiency = 20%

    To find the power input of the sunlight onto the solar panel;

    Mathematically, the efficiency of a machine is given by the formula;

    Efficiency = \frac {Out-put \; power}{In-put \; power} * 100

    Substituting into the formula, we have;

    20 = \frac {0.8}{Ip} * 100

    20 = \frac {80}{Ip}

    Cross-multiplying, we have;

    20Ip = 80

    Ip = \frac {80}{20}

    Input power, Ip = 4 Watts

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