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Q.

A carnot engine operates between a source and sink. The efficiency of the engine, is 40% and the temperature of the sink is 27°C. If the efficiency is to be increased to 50% then the temperature of the source must increased by

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a

120 K

b

160 K

c

100 K

d

80 K

answer is B.

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Detailed Solution

η1=1−T2T1
η2=1−T2T'1

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