How are the pitch and least count of a spherometer related ?

How are pitch and least count of a screw gauge related to each other?

The least count of a spherometer is given by

The screw of a spherometer moves by 4 mm. when its circular scale is given four complete rotations. If circular scale has 200 divisions, calculate pitch and least count of the spherometer.

Least count of a metre scale is

What is least count?

Least count of a metre scale is?

What is the least count of a linear meter scale?

Define the least count of an instrument.

How can we reduce least count of any instrument?

Define least count of a screw gauge.