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Q.

A Carnot engine operating between temperatures T1 and T2 has efficiency 16. When T2 is lowered by 62 K, its efficiency 6 increases to 13. Then T1 and T2 are, respectively :

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a

310K and 248K

b

372 K and 310 K

c

372 K and 330 K

d

330 K and 26 8 K

answer is B.

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Detailed Solution

η1=16=1-T2T1⇒T2T1=56 ⇒              η2=13=1-T2-62T1 ⇒             T2=310 K and T1=372 K
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