Answer:
2.8 %
Explanation:
Power deliver by the cell = 4.2 x 10^-3 W
Power given to the cell = 0.15 W
The efficiency of the cell is defined as the ratio of power deliver by the cell to the power given to the cell.
So, the efficiency of the cell
= power deliver by the cell / power given to the cell
= [tex]\frac{4.2\times10^{-3}}{0.15}[/tex]
= 0.028
in percentage form = 0.028 x 100 % = 2.8 %
Thus, the efficiency of the photo voltaic cell is 2.8 %.
