Figure of a centimetre scale below shows a particular position of Vernier calipers. In this position

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1.Units, Dimensions and Measurement

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The figure of a centimetre scale below shows a particular position of the Vernier calipers. In this position, the value of $x$ shown in the figure is .......... $cm$ (figure is not to scale)

A

$0.02$

B

$3.65$

C

$4.15$

D

$0.03$

(KVPY-2017)

Solution

(D)

At the $4$ th reading of vernier's scale, the length between the two scales is min. and will be the least count $=0.01 \,cm$

So difference at $3$ rd reading of vernier scale is $2 \times 0.01 \,cm$

$\Rightarrow$ difference at and reading of vernier scale will be $3 \times 0.01 \,cm =0.03 \,cm$

Standard 11

Physics

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