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JIPMER Jipmer Medical Solved Paper-2010

  • question_answer
    A square wire frame of size L is dipped in a liquid. On taking out a membrane is formed. If the surface tension of liquid is T, then force acting on a frame will be

    A)  2 TL         

    B)                         4 TL                      

    C)  8 TL                      

    D)         16 TL

    Correct Answer: C

    Solution :

    Since, the wire frame is dipped in liquid, therefore its membrane has two free surfaces. Total length of square wire frame in contact of membrane\[=2\times \]perimeter of square     \[=2\times 4L=8L\] Hence, force acting on a frame \[F=Tl=T\times 8L=8TL\]


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