JEE Main & Advanced Physics Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति Question Bank Assertion and Reason

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

    A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

    B)             If both assertion and reason are true but reason is not the correct explanation of the assertion.

    C)             If assertion is true but reason is false.

    D)             If the assertion and reason both are false.

    E)             If assertion is false but reason is true.

    Correct Answer: A

    Solution :

        Since the gaseous pressure and the displacement (of piston) are in the same direction. Therefore \[\theta =0{}^\circ \] Work done = \[Fs\cos \theta =Fs=\]Positive Thus during expansion work done by gas is positive.


You need to login to perform this action.
You will be redirected in 3 sec spinner