JEE Main 202228 Jun, Evening shiftPhysicsMediumGravitation159× since 2002
Water falls from a 40 m high dam at the rate of 9 10⁴ kg per hour. Fifty percentage of gravitational potential energy can be converted into electrical energy. Using this hydroelectric energy number of 100 W lamps, that can be lit, is :
(Take g = 10 ms^2)