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Physics · PYQ NEET UG 2021
हिन्दीWater falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional force are 10% of the input energy. How much power is generated by the turbine? \( (g = 10\text{ m/s}^2) \)
Correct answer · Option 1
8.1 kW
Explanation
Input power \( P_{in} = \frac{dm}{dt}gh = 15 \times 10 \times 60 = 9000\text{ W} = 9\text{ kW} \). Output power after 10% loss = \( 90% \times 9\text{ kW} = 8.1\text{ kW} \).
