Lab Activity: Use of Vernier Callipers to Measure Diameter

$$\begin{gathered} \mathrm{Given} \mathrm{below} \mathrm{are} \mathrm{two} \mathrm{statements}: \\ \mathbf{Statement}\mathbf{ }\mathbf{I}\mathbf{:} \mathrm{In} \mathrm{a} \mathrm{vernier} \mathrm{callipers}, \mathrm{one} \mathrm{vernier} \mathrm{scale} \mathrm{division} \mathrm{is} \mathrm{always} \mathrm{smaller} \mathrm{than} \mathrm{one} \mathrm{mainscale} \mathrm{division}. \\ \mathbf{Statement}\mathbf{ }\mathbf{II}\mathbf{:} \mathrm{The} \mathrm{vernier} \mathrm{constant} \mathrm{is} \mathrm{given} \mathrm{by} \mathrm{one} \mathrm{main} \mathrm{scale} \mathrm{division} \mathrm{multiplied} \mathrm{by} \mathrm{the} \mathrm{number} \mathrm{of} \mathrm{vernier} \mathrm{scale} \mathrm{division}. \\ \mathrm{In} \mathrm{the} \mathrm{light} \mathrm{of} \mathrm{the} \mathrm{above} \mathrm{statements}, \mathrm{choose} \mathrm{the} \mathrm{correct} \mathrm{answer} \mathrm{from} \mathrm{the} \mathrm{options} \mathrm{given} \mathrm{below}. \end{gathered}$$

Why is it essential to ensure that the zero of the main scale perfectly coincides with the zero of the vernier scale in vernier caliper measurements?

The inner diameter of a cylindrical object can be precisely measured with

Which of the following instruments is not essential for the measurement of the length using vernier calliper?

In order to have correct measurement with a vernier calliper, the eyes should be kept exactly

Which of the following must be taken care of to make a measurement with a vernier calliper?

Zero error in vernier calliper is given by the formula

The difference between the value of one main scale division and one vernier scale division in vernier callipers is known as

What is the correct procedure for measuring the diameter of a cylindrical object using a Vernier caliper?

A Vernier calliper is used to measure the diameter of a steel ball. Its main scale (MS) has divisions of 0.1 cm, and its Vernier scale (VS) has 10 divisions that match 9 divisions on the MS. Here are three examples of these measurements for a ball. Zero error is $-0.03 \mathrm{cm}$.

Then mean corrected diameter is

Which of the following precautions is essential when measuring the diameter of an object with a Vernier caliper?

What should you do if the Vernier scale division that coincides with the main scale division is the $7^{th}$ division on the Vernier scale?

In the procedure for using Vernier calipers to measure the diameter, what is the purpose of looking for the exact coincidence of a vernier scale division with a main scale division in the vernier window from left to right?