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Question

If the solar constant is 1.4kW/m2, then the solar energy received by 1 m2 area in one hour is :
(a) 5040 j        (b) 504.0 kj        (c) 5040 kj        (d) 5.04 kj


Solution

frome space the space solar space constant space we space deduce space that 1.4 space KW space of space power space is space incident space upon space every space 1 straight m squared space of space area straight i. straight e space the space total space energy space incident space in space 1 hr space over space an space area space of space 1 straight m squared space will space be equals 1.4 space KWx 1 hr space space space space space space space space space space space space space space space space space space space space space space space space equals 1.4 KWh left parenthesis since space straight P equals straight E over straight t space or space straight E equals Pxt right parenthesis

1.4 x 1000 x 60 x 60 = 5040000 joule

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