Saved Bookmarks
| 1. |
Height of water dam in hydroelectric power station is 20 m. How much water, in 1 second, should fall on turbine, so that 1 MW power is generated ? (g = 10m/s2) (A) 5000 kg (B) 10,000 kg (C) 500 kg (D) 7,500 kg GSEB - Class 9 Chapter - 1. Work, Energy and Power Page 10 |
| Answer» POWER = 1MW or 1000000 Joulesmgh = 1000000m×10×20 = 1000000m = 1000000/200m = 10000/2m = 5000 KG | |