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

  • question_answer
    One centimeter on the main scale of a vernier calipers is divided into 10 equal parts. If 10 divisions of vernier coincide with 8 small divisions of the main scale, the least count of vernier calipers  is

    A) 0.01 cm

    B)  0.02 cm

    C)  0.05 cm

    D)  0.005 cm

    Correct Answer: B

    Solution :

    [b] The value of 1 division of main scale \[=\frac{1}{10}=0.1cm\] The value of 1 division of vernier scale \[=\frac{8\times 0.1}{10}=0.08cm\] Thus \[L.C.=0.1-0.08=0.02\text{ }cm\]


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