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NEET Sample Paper NEET Sample Test Paper-71

  • question_answer
    The force required to separate two glass plates of area \[{{10}^{-2}}\,{{m}^{2}}\] with a film of water 0.05 mm thick between them is (surface tension of water is \[70 \times  1{{0}^{-}}^{3}\,N/m\])

    A) 28 N                

    B) 14 N

    C) 50 N                

    D) 38 N

    Correct Answer: A

    Solution :

    Force required to separate the plates   \[F=\frac{2TA}{t}=\frac{2\times 70\times {{10}^{-3}}\times {{10}^{-2}}}{0.05\times {{10}^{-3}}}=28\,\,N\]


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