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NEET Sample Paper NEET Sample Test Paper-2

  • question_answer
    A wire is of mass \[(0.3\pm 0.003)g.\]. The radius is \[(0.5\pm 0.005)\,mm\] and length is \[(6.0\pm 0.06)\,cm,\]then % error in density is:

    A)  3                  

    B)  4

    C)  6                  

    D)  \[-2\]

    Correct Answer: B

    Solution :

    Percentage error in density \[=\left[ 2\left( \frac{0.005}{0.5} \right)+\frac{0.003}{0.3}+\frac{0.06}{6} \right]\times 100=4\] Here, note to the wire that area contains squared  radius.


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