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JEE Main & Advanced Physics Fluid Mechanics, Surface Tension & Viscosity / द्रव यांत्रिकी, भूतल तनाव और चिपचिपापन Question Bank Surface Energy

  • question_answer
    Two droplets merge with each other and forms a large droplet. In this process            [CBSE PMT 1993; RPMT 1997, 2000; CPMT 2001; BHU 2001; AFMC 2002]

    A) Energy is liberated      

    B)             Energy is absorbed

    C)             Neither liberated nor absorbed

    D)                 Some mass is converted into energy

    Correct Answer: A

    Solution :

        When two droplets merge with each other, their surface energy decreases.             \[W=T(\Delta A)=(\text{negative})\]i.e. energy is released.


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