The output power from the hydroelectric power station is given by _______. where, 'η' is the efficiency of the system, 'Q' is the quantity of water, 'H' is the total head and 'w' is the specific gravity of water.
1
\(\frac{\eta wQH}{9.81}\) W
2
\(\frac{\eta wQH}{72}\) W
3
\(\eta wQH \times 9.8\) W
4
\(\frac{\eta wQH}{5.61}\) W