NEET Physics Isothermal & Adiabatic Processes Assertion Reason Question
Assertion (A): In an adiabatic process, the change in internal energy is equal to the work done on or by the system. | Reason (R): In an adiabatic process, there is no transfer of heat between the system and its surroundings.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Correct Answer
Detailed Explanation
In an adiabatic process, since q = 0, the first law of thermodynamics gives ∆U = w. The reason correctly explains the assertion as there is no heat transfer.
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