Question

21. Main scale division of vernier calliper is 1 mm and vernier scale division are in A.P.; 1st division is 0.95 mm ; 2nd division is 0.9 mm and so on. When an object is placed between jaws of vernier callipers, zero of vernier lies between 3.1 cm and 3.0 cm and 4th division of vernier coincide with main scale division. Reading of vernier is (a) 3.12 cm (b) 3.14 cm (c) 3.15 cm (d) 3.18 cm​

Answer 1

Answer:

1M.S.D=1mm

1V.S.D=

50

49

×1mm

∴L.C=1M.S.D−1V.S.D=−

50

49

mm

=

50

1

mm

=0.02mm

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