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In a wind energy generation system, what is the function of the gear-box placed between the turbine axle and the generator?
ATo convert the AC output into DC
BTo increase the rotations per time
CTo cool the generator with water
DTo store electricity for night use
Answer & Solution
Correct answer: B. To increase the rotations per time
1. The turbine's axle is connected to the generator through a gear-box.
2. The gear-box's stated function is to increase the rotations per unit time.
3. Faster rotation of the generator helps produce electricity efficiently.
4. Converting AC to DC (option A) is done by other devices, not the gear-box, so it is ruled out.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 5 "Towards Green Energy", p.64_
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