Answer briefly - III — task. Science State Board, Class 9.

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1. How will you measure the least count of vernier caliper?

Least Count of the Vernier caliper is,

\(LC\ =\ \frac{Value\ of\ one\ Vernier\ scale\ division}{Total\ number\ of\ main\ scale\ division}\)
\(LC\ =\ \frac{Value\ of\ one\ main\ scale\ division}{Total\ number\ of\ Vernier\ scale\ division}\)
\(LC\ =\ \frac{Total\ number\ of\ Vernier\ scale\ division}{Value\ of\ one\ main\ scale\ division}\)

Substitute the values,

\(LC\ =\ \frac{1\ cm}{1}\)
\(LC\ =\ \frac{1}{1\ cm}\)
\(LC\ =\ \frac{1\ mm}{10}\)
\(LC\ =\ \frac{10}{1\ mm}\)

\(LC\ =\) \(mm\)

\(LC\ =\) \(cm\)

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