Chapter 10, Problem 37E

Interpretation Introduction

Interpretation:

The surface area of the solar cell required to light a bulb is to be calculated.

Concept Introduction:

Power input on the solar cells is the total active area of the solar cells multiplied by solar power. The percent of the input power that is converted to output power by a solar cell is called its efficiency. Percent efficiency of a solar cell is $100$ multiplied by the ratio of the power out and the power in.

$\text{Percent efficiency}=\frac{\text{Power out}}{\text{Power in}}\times 100$ …… (1)

$\text{Power input}=\text{Surface area }\times \text{ Average solar power}$