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Q.

What is the value of sink temperature when efficiency of engine is 100%?

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a

0 K

b

300 K

c

400 K

d

273 K

answer is A.

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Detailed Solution

efficiency of an ideal heat engine is 

η=1-T2T1   T2 is the temperature of the sink so if T2=0 efficiency witll be 1 

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