Question

The least count of Vernier calipers is $0.1\text{mm}$. The main scale reading, before the zero of the Vernier scale, is $10$ and the zeroth division of the Vernier scale coincides with the main scale division. Given that each main scale division is $1\text{mm}$, the measured value should be expressed as (in $\text{cm}$):

Answer 1

Length measured with Vernier calipers = reading before the zero of Vernier scale + number of Vernier divisions coinciding with any main scale division × least count
$=10\text{mm}+0\times 0.1\text{mm}=10\text{mm}=1\text{cm}$
So, the measured value will be $1\text{cm}$