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Physics - W.E.P. Question with Solution | TestHub

PhysicsW.E.P.PowerMedium2 minPYQ_2021

PhysicsMediumsingle choice

Water falls from a height of $60 m$ at the rate of $15 kg s^{- 1}$ to operate a turbine. The losses due to frictional force are $10 %$ of the input energy. How much power is generated by the turbine? $(g = 10 m s^{- 2})$ NEET 2021

Options:

Answer:

Solution:

Change in potential energy of water per second $= 15 \times g \times 60$

$= 9000 J s^{- 1}$

Energy remaining per second after loss $= 90 %$ of $9000 J s^{- 1}$

$= (\frac{90}{100}) \times 9000$

$= 8100 J s^{- 1}$

$= 8.1 kW$

Stream:NEETSubject:PhysicsTopic:W.E.P.Subtopic:Power

⏱ 2mℹ️ Source: PYQ_2021

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