A) \[420J\]
B) \[2100J\]
C) \[772J\]
D) \[2520J\]
Correct Answer: A
Solution :
[a] COP = |
\[\frac{{{T}_{1}}}{{{T}_{2}}-{{T}_{1}}}=\frac{250}{300-250}=5\] |
\[COP=5=\frac{{{Q}_{L}}}{W}\] |
\[W=\frac{500\times 4.184}{5}=420J\] |
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