least count
- A screw gauge has least count 0.01 mm and there are 50 divisions in its circular scale. The pitch of the screw gauge is: [PMT/NEET-2020]
- The main scale of a vernier calliper has $n$ divisions per cm. $n$ divisions of the vernier scale coincide with $(n-1)$ divisions of the main scale. [PMT/NEET-2019]
- A student measured the diameter of a small steel ball using a screw gauge of least count $0.001\ \text{cm}$. [PMT/NEET-2018]
- A screw gauge gives the following readings [PMT/NEET-2021]