Efficiency of
the Carnot engine is given as 80%. If the cycle direction be reversed, what
will be the value of coefficient of performance of reversed Carnot cycle?
कार्नोट इंजन की दक्षता 80% बताई गई है। यदि चक्र की दिशा उलट दी जाए, तो उलटे कार्नोट चक्र के प्रदर्शन के गुणांक का मूल्य क्या होगा?
1.25
0.8
0.5
0.25
0.25
Given :
Efficiency of
a Carnot engine 
If the cycle
direction be reversed.
..Method 1..
The relation between the efficiency and COP is defined by formula,
Hence, the correct
option is (D).
..Method 2..
Hence, the
correct option is (D).
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