Question

micrometer is made using a bar having 20

threads per cm. On its circular scale it has

100 divisions. A student reads 5 divisions

after 1 cm mark on linear scale and 37

division of circular scale, coinciding with

mainscale for the diameter of a cylinder.

Write the diameter.​

Answer 1

Explanation:

As the number of divisions on main scale are 10 to a centimeter, so the smallest division on main scale will be 1mm and it will be the pitch (p) of the screw gauge. The number of circular divisions is n=100.

The least count of a screw gauge is L.C=p/n=1mm/100=0.01mm

Answer 2

Answer:

As the number of divisions on main scale are 10 to a centimeter, so the smallest division on main scale will be 1mm and it will be the pitch (p) of the screw gauge. The number of circular divisions is n=100.

The least count of a screw gauge is L.C=p/n=1mm/100=0.01mm