JEE Main 2022 — Gravitation Question with Solution
From: JEE Main 2022 (Online) 28th June Evening Shift
Question
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 ms2)
Choose an option
Show full solutionCorrect option: B
Step-by-step explanation
Total gravitational PE of water per second
J/sec
50% of this energy can be converted into electrical energy so total electrical energy W
So total bulbs lit can be bulbs
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This is a previous-year question from JEE Main 2022, covering the Gravitation chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.