Correct Answer - Option 2 : 5.16
Concept:
Refrigerator:
COP of a reversed Carnot cycle
\(COP = \frac{{{T_L}}}{{{T_H} - {T_L}}} \)
where, TL = Lower Temperature, TH = Higher temperature
Calculation:
Given:
TH = 273 + 35°C = 308 K
TL = 273 + (-15°C) = 258 K
\(COP = \frac{{{T_L}}}{{{T_H} - {T_L}}} = \frac{{258}}{{308 - 258}} = 5.16\)