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AMU Medical AMU Solved Paper-1999

  • question_answer
    A 10 cm long wire is placed horizontally on the surface of water and is gently pulled up with a force of \[2\times {{10}^{-2}}N\]to keep the wire in equilibrium. The surface tension, in\[N{{m}^{-1}}\]of water is

    A)  0.1                

    B)  0.2

    C)  0.001             

    D)  0.002

    Correct Answer: A

    Solution :

    :\[S2l=F\](where S is surface tension) Or \[S=\frac{F}{2l}=\frac{2\times {{10}^{-2}}}{2\times 0.1}N{{m}^{-1}}=0.1\,N{{M}^{-1}}\]


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