Q 11-01-056JEE MainJEE Main 2026 (5 Apr, Shift 1)Easy
In a Vernier calipers, when both jaws touch each other, zero of the Vernier scale is shifted to the right of zero of the main scale and $7^{\text{th}}$ Vernier division coincides with a main scale reading. If the value of $1$ main scale division is $1$ mm and there are $10$ Vernier scale divisions, then the Vernier caliper has
Answer: (C) $0.07$ cm positive zero error
Least count $= \dfrac{1\ \text{mm}}{10} = 0.1$ mm.
The Vernier zero lies to the right of the main-scale zero, so the zero error is positive. Its size is $7 \times 0.1 = 0.7$ mm $= 0.07$ cm.
Solution by Sreeraj P, M.Sc Physics