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Physics · PYQ NEET UG 2025
हिन्दीConsider the diameter of a spherical object being measured with the help of a Vernier callipers. Suppose its 10 Vernier Scale Divisions (V.S.D.) are equal to its 9 Main Scale Divisions (M.S.D.). The least division in the M.S. is \( 0.1\text{ cm} \) and the zero of V.S. is at \( x = 0.1\text{ cm} \) when the jaws of Vernier callipers are closed. If the main scale reading for the diameter is \( M = 5\text{ cm} \) and the number of coinciding vernier division is \( 8 \), the measured diameter after zero error correction, is Which of the above statements is/are correct?
Correct answer · Option 3
\( 4.98 \text{ cm} \)
Explanation
Least count \( LC = 0.1\text{ mm} = 0.01\text{ cm} \). Initial zero error \( e = +0.1\text{ cm} \). Measured reading \( R = M + n(LC) - e = 5 + 8(0.01) - 0.1 = 5.08 - 0.1 = 4.98\text{ cm} \).
