Question

In figure, the pitch of the screw is 1 mm. Find 1)the least count of screw gauge and 2) the reading represented in the diagram.

Answer 1

the answer will come 0.297

Answer 2

Answer:

1) 0.001mm

2) 0.297

Explanation:

i) given, pitch of the screw = 1 mm

no. of divisions on the circular reading = 100

l.c = pitch/no of division on the circular scale = 1mm/100 = 0.001mm or 0.01 mm

ii) main scale reading = 2mm= 0.2 cm

since 97th division of head scale coincides with the base line

p=97

circular scale reading = p *L.C= 97* 0.001 cm = 0.097cm

total reading=  main scale + circular scale reading = 0.2cm +0.097 = 0.297cm