JEE Main Physics question
The height of the dam in a 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 turbines is
Answer: (D)
Solution
P = (m/t)gh ⟹ m/t = P/(gh) = 10⁶/(10×10) = 10⁴ kg/s.