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Q.

An ideal Carnot engine whose efficiency is 40% receives heat at 500K if the efficiency is to be 50%, the intake temperature for the same exhaust temperature is.

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a

600 K

b

900 K

c

700 K

d

800 K

answer is A.

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Detailed Solution

T1=500K,Asn=1−T2T1 or T2T1=1−n ∴T2500=1−40100=35 or T2=300K now T2T1=1−n=1−50100=12 ∴T1=2T2=2×300=600K

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An ideal Carnot engine whose efficiency is 40% receives heat at 500K if the efficiency is to be 50%, the intake temperature for the same exhaust temperature is.