Q. The height of the dam, in an hydroelectric power station is $10\ m$. In order to generate $1\ MW$ of electric power, the mass of water (in $kg$) that must fall per second on the blades of the turbine is
A) $10^{6}$
B) $10^{5}$
C) $10^{3}$
D) $10^{4}\ $
Explanation
(d) Using
Potential energy $= mgh \Rightarrow 1 \times 10^{6} = m \times 10 \times 10$
$m = 10^{4}kg/sec$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.