Question

The pitch of screw gauge is 1 mm and there are 100
divisions on circular scale. While measuring diameter
of a wire, linear scale reads 1 m; and 39th division of
circular scale coincides with reference line. The zero
error is -0.05 mm. The correct diameter of wire is​

Answer 1

Answer:

Explanation:

given pitch equals to 1 mm

CSD = 50

therefore least count equals to pitch by

CSD

equals to 1/50=0.02mm

1MSR= 3mm

1 CSR = 31

error(e)= 6xL.C

= 6x0.02

= 0.12mm