Back to THERMODYNAMICS
NEET UG PHYSICS MCQ: THERMODYNAMICS
1
Medium
1 of 1
Analyzing
+4 | -1
(A): A room can not be cooled by opening the door of a refrigerator in a closed room
(R): Heat flows from lower temperature (refrigerator) to higher temperature (room).
(R): Heat flows from lower temperature (refrigerator) to higher temperature (room).
View answer and explanation
Correct option: A
Both (A) and (R) are true and (R) is the correct explanation of (A)
Option A is correct because the refrigerator transfers heat from its inside to the room, ultimately increasing the room's temperature, and this is due to heat flowing from a colder to a hotter region with external work.
More Questions from THERMODYNAMICS
Practice All Chapter MCQs β
The work done during expansion of a gas is independent of pressure if the expansion takes place
When heat is added to a system, which of the following is not possible?
The relation for an adiabatic expansion is
A Carnot engine has efficiency . Efficiency becomes when temperature of sink is decreased by 50 K (keeping source fixed). What is the original temperature of the sink? If sink and source temperature of a refrigerator are and respectively. Then efficiency of refrigerator is The unit of mechanical equivalent of heat is
A Carnot engine has efficiency . Efficiency becomes when temperature of sink is decreased by 50 K (keeping source fixed). What is the original temperature of the sink? If sink and source temperature of a refrigerator are and respectively. Then efficiency of refrigerator is The unit of mechanical equivalent of heat is
