AP EAMCET Engineering 21 Sep 2020 Shift 2 Paper

(b) The efficiency of Carnot's engine is given as
η=1−‌

T2

T1

‌‌.......(i)
where, T1= temperature of source
and T2= temperature of sink
For 100% efficiency, η=1
∴ From Eq. (i), we get
1=1−‌

T2

T1

⇒‌

T2

T1

=0⇒T2=0
Hence, temperature of sink T2 is equal to absolute zero.