The door of a running refrigerator inside a room is left open. The correct statement out of the following ones is

Options

A. The room will be cooled slightly
B. The room will be warmed up gradually
C. The room will be cooled to the temperature inside the refrigerator
D. The temperature of the room will remain unaffected.

Answer

B

Explanation

C.O.P `=Q_2/W=T_2/(T_1-T_2)`
when door is left open `T_2 rarr T_1` , Hence C.O.P. `uarr` i.e. `theta_2uarr` . So heat energy given to the room increases.