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In a hydroelectric power plant, the potential energy of water stored in a dam is first converted into which form before it drives the turbine?
AChemical energy of fuel
BKinetic energy of water
CThermal energy of steam
DNuclear energy of atoms
Answer & Solution
Correct answer: B. Kinetic energy of water
1. Water stored high in a dam has potential energy.
2. As it is brought down to the turbine, it flows fast and gains kinetic energy.
3. This kinetic energy of flowing water drives the turbine.
4. No fuel is burnt, so chemical or thermal energy (options A and C) is ruled out.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 5 "Towards Green Energy", p.62_
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