Question

in a screw gauge , there are 50 divisions on its cap and pitch of screw is 1 mm when is placed between studs then it gives 3 divisons on main scale and 15 circular scale division soincides with base line ,Diameter of the wire is -
A. 1.80 mm
B. 3.30 mm
C. 3.15 mm
D. none of these

Answer 1

Correct Answer - B
`LC =(1)/(50)=.02 mm , MSR =3xx1mm =3mm`
CSR `=15xx.02 =3.0mm,`
diameter of wire =3.30 mm