In a Vernier calipers. 10 divisions of Vernier scale are
equal to the 9 divisions of main scale. When both
jaws of Vernier calipers touch each other, the zero of
the Vernier scale is shifted to the left of zero of the
main scale and 4th Vernier scale division exactly
coincides with the main scale reading. One main
scale division is equal to 1 mm. While measuring
diameter of a spherical body, the body is held
between two jaws. It is now observed that zero of the
Vernier scale lies between 30 and 31 divisions of
main scale reading and 6th Vernier scale division
exactly coincides with the main scale reading. The
diameter of the spherical body will be
[JEE Main 2022]
(1) 3.02 cm (2) 3.06 cm (3) 3.12 cm (4) 3.20 cm
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