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Question

The approximate value of solar constant is ___.

A
1.4 k W/m2
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B
1.4 k W/min
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C
1.4 k J/m2
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D
1.4 k W/min2
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Solution

The correct option is A 1.4 k W/m2
Solar constant is the amount of solar energy received normally at outer edge of earth's atmosphere by an area of 1m2 in 1 second at the mean distance between earth and the sun. It is approximately equal to 1.4 kJ s1m2 or 1.4 kW m2.

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