Question

The sun delivers 10^3W/m^2 of electromagnetic flux to the earth's surface . The total power that is incident to the roof of dimensions 8m* 20 m ,will be

Answer 1

Answer.        (D) 1.6 × 105 w

                    I = 103(w/m2)

                              power = intensity × area

                                        = 103 × 8 × 20

                                        = 160 × 103

                                        = 1.6 × 105 w   

HOPE IT HELPS U...!!❤❤❤

 

Answer 2

Answer:

The total power that is incident to the roof = $1.6*10^5 W$

Explanation:

Power delivered per square meter by sun = Intensity,  $I$ = $10^3 w/m^2$

Total power incident, $P$ = intensity × area

Area of the roof = $8m*20m=160m^2$

Total power that is incident to the roof, $P$ = $I$ x Area

$\implies P=10^3*160$

$\implies P= 1.6*10^5 W$

 

Therefore, the total power that is incident to roof of dimensions 8m* 20 m = $P=1.6*10^5 W$    

#SPJ2