Published by:
CGP EDU Academic Team
Published on: August 13, 2026
A Carnot engine operating between two reservoirs has efficiency 
. When the temperature of cold reservoir raised by 
, its efficiency decreases to 
. The value of 
, if the temperature of hot reservoir is 
, will be:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Given 
When 
i.e., temp. of cold reservior
Temp. of hot reservior 
As we know,
From equqation
By putting the value of 
in equation
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