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Units and Measurement
Question
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What is the difference between vernier constant and least count?

Answer

The least count is the minimum measurement that an instrument can make. Every measuring instrument has least count. The size of the smallest divison on a scale is called as the least count. 
Vernier constant is the special name given for the least count of vernier calipers. It is the ratio of smallest division of main scale to the number of divisions of vernier scale.

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Some More Questions From Units and Measurement Chapter

Define physical quantity.

 

Give four examples of physical quantities.

Define unit.

What are the two main required characteristics of a unit?

Can we use same units for different physical quantities?

Can we use different units to measure same physical quantity?

To measure a physical quantity X, the unit U is repeatedly used for n times. What is the magnitude of physical quantity?

Does the numerical factor in the quantitative measurement depend on the system of unit used?

Is one unit sufficient to measure a physical quantity?