JEE Main & Advanced Physics Mathematical Tools, Units & Dimensions Question Bank Self Evaluation Test - Physical World, Units and Measurements

  • question_answer
    In a vernier callipers N division of vernier coincide with \[(N-1)\] divisions of main scale in which length of a division is 1 mm. The least count of the instrument in cm is

    A) N

    B)  \[N-1\] 

    C)  \[\frac{1}{10N}\]

    D)  \[(1/N)-1\]

    Correct Answer: C

    Solution :

    [c] \[L.C.=\frac{value\,of1\,division\,of\,main\,scale}{number\,of\,division\,on\,main\,scale}\] \[=\frac{1}{N}mm=\frac{1}{10N}cm\]


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