Question

The door of a running refrigerator inside a room is left open. The correct statement out of the following ones is
A. The room will be cooled slightlt
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 uneffected.

Answer 1

Correct Answer - B
Cofficient of performance of refrigerator is `(Q_(2))/W= (T_(2))/(T_(1)-T_(2))`
When the door of a running refrigerator inside a room is left open, `T_(2)rarrT_(1)`. Coefficient of performance increases. `Q_(2)` increases. Therefore, heat energy given to the room increases. Hence the room will be warmed up gradually.