1. Tardigrade
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  4. The sun delivers 103 W / m 2 of electromagnetic flux to the earth's surface. The total power (in kW ) that is incident on a roof of dimensions 8 m × 20 m is

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Q. The sun delivers $10^{3} W / m ^{2}$ of electromagnetic flux to the earth's surface. The total power (in $kW$ ) that is incident on a roof of dimensions $8 m \times 20\, m$ is

Electromagnetic Waves

Solution:

$P=I \times A=10^{3} \times 8 \times 20$
$=16 \times 10^{4} \,W$