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MGIMS WARDHA MGIMS WARDHA Solved Paper-2008

  • question_answer
    The maximum force in addition to the weight required to pull a wire of 5.0 cm long from the surface of water at temperature 20°C, is 728 dyne. The surface tension of water is

    A) 7.28 N/cm                          

    B) 7.28 dyne/cm

    C) 72.8 dyne/cm                   

    D) 7.28 x102 dyne/cm

    Correct Answer: C

    Solution :

    \[T=\frac{F}{2l}\] \[=\frac{728}{2\times 5}\] \[\therefore \]  \[T=72.8\,dyne/cm\]


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