Question

The vernier constant of two vernier callipers $A$ and $B$ are $0.01cm$ and $0.01mm$ respectively. Which one can measure the length of an object more accurately?

• A. Vernier $A$
• B. Vernier $B$
• C. Accuracy in measurement does not depend on vernier constant
• D. Both $A$ and $B$ are equally accurate

Answer 1

Answer: (B)

Vernier $B$

The accuracy of measurement of any instrument is measured by the $minimum$ length that can be measured by it, or the $leastcount$ of that instrument.

$Less$ is the least count, more accurate it is.

Here, $B$ has less least count or the vernier constant .

Hence, it can measure length with $moreaccuracy$.