The scales - vernier callipers, metre scale and screw gauge has the least counts:

Q.

Consider a Vernier calipers in which each $1cm$ on the main scale is divided into $8$ equal divisions and a screw gauge with $100$ divisions on its circular scale. In the Vernier callipers, $5$ divisions of the Vernier scale coincide with $4$ divisions on the main scale and in the screw gauge, one complete rotation of the circular scale moves it by two divisions on the linear scale. Then

Q. On the basis of details given about two measuring instruments, select the correct statement .

(i) Vernier callipers having main scale division=0.05 cm and Vernier scale division $=\frac{2.45}{50}$ cm

(ii) Screw gauge having pitch 0.5 mm and its circular scale has 50 divisions

Q. Consider a Vernier callipers in which each $1$ cm on the main scale is divided into $8$ equal divisions and a screw gauge with $100$ divisions on its circular scale. In the Vernier callipers, $5$ divisions of the Vernier scale coincide with $4$ divisions on the main scale and in the screw gauge, one complete rotation of the circular scale moves it by two divisions on the linear scale. Then

Q. The main scale of a vernier callipers has $n\text{divisions/cm}$. $n$ divisions of the vernier scale coincide with $(n-1)$ divisions of main scale. The least count of the vernier callipers is

Q. A Vernier callipers has $1$ mm marks on the main scale. It has $20$ equal divisions on the Vernier scale which match with $16$ main scale divisions. For this Vernier callipers, the least count is?