Question

5.
6. State the formula for calculating length if :
(a) Number of vernier scale division coinciding with main scale and number of division of main scale on left
hand side of zero of vernier scale are known.
(b) The reading of main scale is known and the number of vernier scale divisions coinciding with main scale
are known.
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Answer 1

Answer:

1.Length recorded = Main scale reading + L.C. × V.S.D.

2.The main scale of a vernier callipers is calibrated in mm and 19 divisions of main scale are equal in length to 20 divisions of vernier scale. In measuring the diameter of a cylinder by this instrument, the main scale reads 35 divisions and 4th division of vernier scale coincides with a main scale division.