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A Carnot engine, whose efficiency is 40%...

A Carnot engine, whose efficiency is `40%`, takes in heat from a source maintained at a temperature of 500K. It is desired to have an engine of efficiency `60%`. Then, the intake temperature for the same exhaust (sink) temperature must be:

A

efficiency of carnot engine cannot be made larger than 50 %

B

1200 K

C

750 K

D

600 K

Text Solution

Verified by Experts

The correct Answer is:
C
For 1st case,
efficiency `=eta=(1-(T_1)/(T_2))xx100`
`(1-(T_1)/(500))xx100=40 implies T_1=300K`
For 2nd case,
`eta=(1-(300)/(T_2))xx100=60`
`T_2=750K`.
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