When both jaws of vernier callipers touch each other, zero mark of the vernier scale is right to zero mark of main scale, \(4^{\text {th}}\) mark on vernier scale coincides with certain mark on the main scale. While measuring the length of a cylinder, observer observes 15 divisions on main scale and \(5^{\text {th}}\) division of vernier scale coincides with a main scale division. Measured length of cylinder is ___________ mm. (Least count of Vernier calliper \(= 0.1\ mm\))

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Answer & Solution

Correct Answer

(B) 15.1

Step-by-step Solution

Detailed explanation

\(Reading = MSR + (VSR \times LC) - (Zero\ Error)\)
\(= 15\ mm + (5 \times 0.1\ mm) - (4 \times 0.1\ mm)\)
\(Reading = 15.1\ mm\)
\(\therefore \ell=15.1 mm\)

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