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NEET Sample Paper NEET Sample Test Paper-3

  • question_answer
    The diameter of a wire is measured with a screw gauge having 50 divisions an circular scale and by one complete rotation of circular scale, main scale moves\[0.5\text{ }mm\]. If reading of screw gauge is\[0.250\text{ }c.m\]. The minimum percentage error in the reading will be

    A)  \[0.4\]            

    B)  \[0.8\]

    C)  \[4\]                           

    D)  \[5\]

    Correct Answer: A

    Solution :

         Least count of screw gauge \[=\frac{0.5}{50}=0.01\,mm\] Percentage error of diameter \[=\frac{0.01}{2.50}=100=0.4\,%\] (as, \[2.50\,mm=\text{ }0.25\,cm\])


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