JEE Main Physics question

Statement 1: When a gas is allowed to expand, work done by the gas is positive. Statement 2: Force due to gaseous pressure and the displacement (of the piston) are in the same direction.

(A)Assertion is True, Reason is True; Reason is correct explanation for AssertionCorrect
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is True

Answer: (A)

Solution

During expansion, the gas pressure pushes the piston outward in the same direction as the piston's displacement (θ=0°),

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Question ID VK-154184