JEE Main & Advanced Physics Mathematical Tools, Units & Dimensions JEE PYQ - Mathematical Tools Units and Dimensions

  • question_answer
    A screw gauge gives the following reading when used to measure the diameter of a wire.
                Main scale reading:                     0 mm
    Circular scale reading:                  52 divisions
    Given that 1 mm on main scale corresponds to 100 divisions of the circular scale. [AIEEE 2011]
                The diameter of wire from the above data is

    A) 0.005 cm

    B) 0.52 cm

    C) 0.052 cm

    D) 0.026 cm

    Correct Answer: C

    Solution :

    [c] Diameter = main scale reading \[+1.c.\times \] circular scale reading
                \[=0+52\times \frac{1}{100}mm\]
    \[=0.52mm=0.052\,cm\]


You need to login to perform this action.
You will be redirected in 3 sec spinner