Questions
If a machine perform 4000 J output work and 1000 J is inside loss due to friction, then find the efficiency.
detailed solution
Correct option is A
∵ Efficiency =W0Wi×100Given, W0=4000 J and rγi=4000+1000=5000 J∵ EffIciency (η)=40005000×100=80%Talk to our academic expert!
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Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. It losses 10% of energy due to frictional forces . How much power is generated by the turbine?
(g = 10 )
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