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Q.

An ideal heat engine working between temperature TH and TL has efficiency η . If both the temperature are raised by 100K each, the new efficiency of heat engine will be

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a

Equal to η

b

Greater than η

c

Less than η

d

Greater or less than η depending upon the nature of the working substance

answer is C.

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Detailed Solution

η1=1-T2T1 η2=1-T2+100T1+100
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An ideal heat engine working between temperature TH and TL has efficiency η . If both the temperature are raised by 100K each, the new efficiency of heat engine will be