NEET Physics Heat Engines MCQ Question
Consider a container with thermally conducting walls, filled with water at temperature T_A, and enclosed in a heat reservoir at temperature T_B. Which statement correctly describes the process when heat is transferred from the surroundings to the system?
The internal energy change ∆U is equal to the heat absorbed q.
The internal energy change ∆U is zero regardless of heat transfer.
The internal energy change ∆U is negative as heat is transferred to the system.
The internal energy change ∆U is positive only if work is done by the system.
Correct Answer
Detailed Explanation
According to the NCERT context, when no work is done at constant volume and heat is transferred from surroundings to the system, the change in internal energy ∆U equals the heat absorbed, q.
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