Answer:
Efficiency = 20%
Explanation:
Given the following data;
Input energy = 1000 Joules
Output energy = 200 Joules
To find the efficiency of the solar cell;
[tex] Efficiency = \frac {Out-put \; energy}{In-put \; energy} * 100 [/tex]
Substituting into the formula, we have;
[tex] Efficiency = \frac {200}{1000} * 100 [/tex]
[tex] Efficiency = 0.2 * 100 [/tex]
Efficiency = 20%
