Water falls from a 40   m high dam at the rate of 9 × 10 4   kg per hour. Fifty percentage of gravitational potential energy can be converted into electrical energy. Using this hydro electric energy number of 100   W lamps, that can be lit, is (Take g = 10   ms - 2 )

Question

Water falls from a 40 &#160; m high dam at the rate of 9 &#215; 10 4 &#160; kg per hour. Fifty percentage of gravitational potential energy can be converted into electrical energy. Using this hydro electric energy number of 100 &#160; W lamps, that can be lit, is (Take g = 10 &#160; ms - 2 )

Aicharya · Accepted Answer

Since 50 % efficiency is given, half of the energy of the falling water will be used by the bulbs. Therefore, 1 2 &#8710; m g h &#916; t = n &#215; P &#8658; 1 2 &#215; 9 &#215; 10 4 3600 &#215; 10 &#215; 40 = 100 n &#8658; n = 50

Water falls from a 40   m high dam at the rate of 9 × 10 4   kg per hour. Fifty percentage of…

Solution

Water falls from a 40 &#160; m high dam at the rate of 9 &#215; 10 4 &#160; kg per hour. Fifty percentage of…

Solution

Water falls from a 40 m high dam at the rate of 9 × 10 4 kg per hour. Fifty percentage of…