Question

What is the efficiency of a solar cell if 1000 J of solar energy hits the

cell and 200 J are converted into electrical energy?

Answer 1

Efficiency = 20%

Step-by-step explanation:

Given the following data;

Input energy = 1000 Joules

Output energy = 200 Joules

To find the efficiency of the solar cell;

`Efficiency = \frac {Out-put \; energy}{In-put \; energy} * 100`

Substituting into the formula, we have;

`Efficiency = \frac {200}{1000} * 100`

`Efficiency = 0.2 * 100`

Efficiency = 20%