Question

Define the least count of an instrument.
ii) Explain the types of Zero error of the Vernier caliper.
iii) Write the steps involved in measuring any dimension of a given object using a
Vernier caliper

TNSCERT Class 9 General Science Ch 5 Measurement and Measuring Instruments

Answer 1

1.Least count of an instrument is the smallest accurate reading it can give.
2.There are two types of error in Vernier caliper---
Positive Zero Error--This error is observed when the zero of the vernier scale is to the right side of the main scale's zero.
Negative Zero Error---In this case it is opposite. In it the zero of the vernier scale is to the left of the main scale's zero.
3.To measure the dimension of the given object add the main scale's reading with the product of least count and the division which coincides with the main scale's division.
Hope this helps u dude.