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Temperature of source is 327^(@)C. Temp...

Temperature of source is `327^(@)C`. Temperature of sink is changed in order to increase the efficiency of engine from `(1)/(5)` to `(1)/(4)`, by

A

30K

B

303K

C

603K

D

60K

Text Solution

Verified by Experts

The correct Answer is:
A
`eta=1-(T_(2))/(T_(1)), (1)/(5)=1-(T_(2))/(T_(1))`
`(1)/(4)=1-(T'_(2))/(T_(1))`
`(T_(2)-T'_(2))/(T_(1))=(1)/(4)-(1)/(5)=(1)/(20)`
`DeltaT_(2)=(1)/(20)xx(327+273)=30K`
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