24b4ikates please help me, thanks Solar cells generate a potential difference wh

Question

24b4ikates

please help me, thanks

Solar cells generate a potential difference when exposed to sunlight. In an experiment, you wish to charge a rechargeable battery by connecting it in series to an array of solar cells. You perform the experiment outdoors, in direct sunlight, when the intensity of solar radiation is

1000 W/m2.

However, your solar cells only have an efficiency of 15%(that is, only 15% of the sunlight power transmitted to the solar cells is delivered to the rechargeable battery). While the circuit is connected, you measure at one instant the potential difference across the battery to be 5.20 V and the current in the circuit to be 0.21 A. What is the area of the array of solar cells?

m2

Explanation / Answer

efficiency = P/(E*A)

       0.15 = (5.2*0.21)/1000*A

Area is,

            A= (5.2*0.21)/1000*0.15 = 0.00728 m2 = 7.28x10-3 m2

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