The main scale of a given vernier caliper is callibrated in mm. 10 divisions of the vernier scale are equal in length to length of 9 divisions of the main scale. Find its least count. while measuring the diameter of a sphere, the zero of vernier scale lies between 2.3 and 2.4 cm mark observed diameter of the sphere.
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Answer:
∴ Main scale division (s) =0.05cm
Also, vernier scale division (v) =
50
2.45
=
100
4.9
=0.049cm/div
Thus, least count =0.05−0.049=0.001cm
Diameter =5.10+24×0.001
=5.124cm