1.

The vernier constant of a vernier callipers is `0.001 cm`. If `49` main scale divisions coincide with `50` vernier scale devisions, then the value of `1` main scale divisions is .A. `0.1mm`B. `0.5mm`C. `0.4mm`D. `1mm`

Answer» Correct Answer - B
`50VSD=49MSD`
`MSD=(49)/(50)MSD`
`LC=1MSD-1VSD`
`=1MSD-(49)/(50)MSD`
or `LC=(1)/(50)MSD`
`1 MSD=50(LC)`
`=50(0.001)cm`
`=0.05cm`
`=0.5mm`.


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