Name the two scales of a vernier callipers and explain, how it is used to measure a length correct up to 0.01 cm.

Define least count of a vernier callipers. How do you determine it?

A vernier callipers has a zero error +0.06cm. Draw a neat labelled diagram to represent it.

Explain the terms —

(i) pitch, and

(ii) least count of a screw gauge.

How are they determined?