The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by $$\frac{{{{\text{T}}_1} - {{\text{T}}_2}}}{{{{\text{T}}_1}}}.$$ The co-efficient of performance (C.O.P.) of a Carnot heat pump operating between T1 and T2 is given by
A. $$\frac{{{{\text{T}}_1}}}{{{{\text{T}}_1} - {{\text{T}}_2}}}$$
B. $$\frac{{{{\text{T}}_2}}}{{{{\text{T}}_1} - {{\text{T}}_2}}}$$
C. $$\frac{{{{\text{T}}_1}}}{{{{\text{T}}_2}}}$$
D. $$\frac{{{{\text{T}}_2}}}{{{{\text{T}}_1}}}$$
Answer: Option B
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