Thermodynamics Question 167

Question: An ideal heat engine working between temperature T1­ and T2 has an efficiency h, the new efficiency if both the source and sink temperature are doubled, will be

[DPMT 2000]

Options:

A) η2

B) η

C) 2η

D) 3η

Show Answer

Answer:

Correct Answer: B

Solution:

In first case η1=T1T2T1 .

In second case η2=2T12T22T1

=T1T2T1=η



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