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In a thermal power plant, what is used directly to drive the turbine?
AFalling river water
BHigh-pressure steam
CBurning coal lumps
DConcentrated sunlight
Answer & Solution
Correct answer: B. High-pressure steam
1. Coal is burnt to heat water in a boiler.
2. This produces steam of very high temperature and pressure.
3. The energy of this steam drives the turbine.
4. Falling water (option A) drives turbines in hydroelectric plants, not thermal plants, so that is ruled out.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 5 "Towards Green Energy", p.57_
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