When both jaws of vernier callipers touch each other, the zero mark of the vernier scale is right to the zero mark of the main scale. The 4th mark on the vernier scale coincides with a certain mark on the main scale. While measuring the length of a cylin

Question

When both jaws of vernier callipers touch each other, zero mark of the vernier scale is right to zero mark of main scale, 4th 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 5th division of vernier scale coincides with a main scale division. Measured length of cylinder is ______ mm.
(Least count of Vernier calliper = 0.1 mm) [2026]

Smart Achievers · Accepted Answer

(2)

$Reading = MSR + (VSR \times LC) - (zero error)$

$= 15 mm + (5 \times 0.1 mm) - (4 \times 0.1 mm)$

$Reading = 15.1 mm$

$∴$ $ℓ = 15.1 mm$

Solution

1 15.4

2 15.1

3 15.9

4 15.5

Ans.
(2)

$Reading = MSR + (VSR \times LC) - (zero error)$

$= 15 mm + (5 \times 0.1 mm) - (4 \times 0.1 mm)$

$Reading = 15.1 mm$

$∴$ $ℓ = 15.1 mm$

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