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A reversible engine takes heat from a re...

A reversible engine takes heat from a reservoir at `527^(@)C` and gives out to the sink at `127^(@)C.` The engine is required to perform useful mechanical work at the rate of 750 watt. The efficiency of the engine is

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The correct Answer is:
50
Efficiency `eta = 1 - T_2/T_1 " "rArr" "eta = 1 - 400/800 =1/2 `or ` eta = 50 %`
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