Question

On clear day, sunlight delivers approximately 1000 J each second to a 1 m2 surface; smaller areas receive proportionally less--half the area receives half the energy. A 12% efficient solar cell, a square 12 cm on a side, is in bright sunlight.

How much electric power does it produce?

A) 0.6W

B) 1.1 W

C) 1.7 W

D) 2.3W

Answer 1

Here we apply relation between power and intensity.