JEE Main 2023 — Experimental Physics Question with Solution

In an experiment with vernier callipers of least count $0.1 \mathrm{mm}$, when two jaws are joined together the zero of vernier scale lies right to the zero of the main scale and $6^{\mathrm{th}}$ division of vernier scale coincides with the main scale division. While measuring the diameter of a spherical bob, the zero of vernier scale lies in between $3.2 \mathrm{cm}$ and $3.3 \mathrm{cm}$ marks and $4^{\mathrm{th}}$ division of vernier scale coincides with the main scale division. The diameter of bob is measured as