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NEET
Exam
NEET
Subject
Physics
Chapter
Experimental Physics

NEET · Physics · Experimental Physics

There are four Vernier seales, whose specifications are given in...

There are four Vernier seales, whose specifications are given in column-1 and the least count is given in Column-II. Match the Columns-1 and II with correct specification and corresponding least count ((\mathrm{s}=) value of main scale division, (\mathrm{n}=) number of marks on Vernier). Assume ((\mathrm{n}-1)) main scale divisions are equal to n Vernier divisions. (
Column-IColumn-II
A.s=1 mm, n=10P.0.05 mm
B.s=0.5 mm, n=10Q.0.01 mm
C.s=0.5 mm, n=20R.0.1 mm
D.s=1 mm, n=100S.0.025 mm
)

Options

  1. AA-(Q); B-(R); C-(P); D-(S)
  2. BA-(R); B-(P); C-(S); D-(Q)
  3. CA-(P); B-(Q); C-(R); D-(S)
  4. DNone of these

Correct answer

B. A-(R); B-(P); C-(S); D-(Q)

Step-by-step solution

Least count (LC) of a Vernier =s/n=s / n, where s=s= main scale division (MSD) value, (n=\mathrm{n}=) number of Vernier divisions. - (A: s=1  mm,\mathrm{~mm},n=10 \Rightarrow L C=1 / 10=0.1  mm⇒\mathrm{~mm} \Rightarrow) R - B: (s=\mathrm{s}=0.5  mm,n=\mathrm{~mm}, \mathrm{n}=10 \Rightarrow LC=\mathrm{LC}=0.5 / 10=0.05 mm⇒P\mathrm{mm} \Rightarrow \mathrm{P}) - (C\mathrm{C}: s=\mathrm{s}=0.5  mm,n=\mathrm{~mm}, \mathrm{n}=20 \Rightarrow LC=\mathrm{LC}=0.5 / 20= 0.025  mm⇒ S\mathrm{~mm} \Rightarrow \mathrm{~S}) - (D\mathrm{D}: s=\mathrm{s}=1  mm,n=\mathrm{~mm}, \mathrm{n}=100 \Rightarrow LC=\mathrm{LC}=1 / 100=0.01 mm⇒Q\mathrm{mm} \Rightarrow \mathrm{Q}) Hence option (2).
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