The sun delivers $10^3 W/m^2$ of electromagnetic flux to the earth's surface.
The sun delivers $10^3 W/m^2$ of electromagnetic flux to the earth's surface. The total power that is incident on a roof of dimensions 8m x 20m, will be:
Answer & explanation
Correct answer: option 3
$ \text{ Total power is } P = IA = 10^3 \times 160 W = 1.6\times 10^5W$