Question

The diameter of a cylinder is measured using a Vernier callipers with no zero error. It is found that the zero of the Vernier scale lies between `5.10cm and 5.15cm` of the main scale. The Vernier scale has `50` divisions equivalent to `2.45 cm`. The `24^(th)` division of the Vernier scale exactly coincides with one of the main scale divisions. the diameter of the cylinder is
A. (a) `5.112cm`
B. (b) `5.124cm`
C. ( c ) `5.136cm`
D. (d ) `5.1148cm`

Answer 1

Correct Answer - B
(b) Reading = M.S.R + No of division of `V.S matching the main scale division `(1MSD -1VSD)`
`= 5.10 + 24((0.05 -(2.45)/(50))`
`=5.124cm` option (b) is correct.