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# What is the least count of a vernier caliper?

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## Determine the least count of a vernier caliper.The smallest measurement that an instrument can take correctly is its least count. $\text{Least Vernier caliper count}=\frac{\text{Smallest division on main scale}}{\text{Number of divisions on Vernier scale}}\phantom{\rule{0ex}{0ex}}⇒=\frac{1mm}{10divisions}\phantom{\rule{0ex}{0ex}}⇒=0.1mm$Hence, the Vernier caliper least counts formula is derived by dividing the smallest reading of the main scale by the total number of divisions of the vernier scale.

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