Page 3 - 9-phy-1 Measurements

Least count (LC) = ……………mm = ……..cm

Zero error = .…………….. cm

Zero correction (ZC) = (±)....................... cm

No. Main scale No. of vernier division Fraction to Observed Corrected diameter
of Reading M coinciding with the be added diameter
Obs. MS division n X = n × LC Y = M +X D= Y ± ZC
(cm) (cm)
(cm) (cm)

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Mean diameter = D = …………………….. cm
Radius of the cylinder = r = D/2 = …….…… cm

Area of cross section of solid cylinder = p(radius of cylinder)2

A = p r2 !
Area of cross section of solid cylinder = ……. cm2
• Jaws of vernier
callipers should be
closed gently.

• Zero correction
should be applied.

• Both jaws should
touch the cylinder.

1. Vernier callipers is used to measure some quantity of the given beaker as
shown in Figure 1.1.5.
(i) Name the quantity to be measured.
____________________________________________________
(ii) Which parts of vernier callipers have been used?
____________________________________________________
(iii) What is the reading shown in the figure?
____________________________________________________

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