Back to THERMODYNAMICS
NEET UG PHYSICS MCQ: THERMODYNAMICS
1
Medium
1 of 1
Understanding
+4 | -1
Air in a cylinder is suddenly compressed by a piston, which is then maintained at the same position. With the passage of
View answer and explanation
Correct option: A
The pressure decreases
Option A (The pressure decreases) is correct because when air is suddenly compressed, the temperature increases. However, with the passage of time, the heat dissipates to the surroundings, and the temperature returns to the initial value. Since the volume is smaller, the pressure decreases to maintain thermal equilibrium.
More Questions from THERMODYNAMICS
Practice All Chapter MCQs →
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
