A vernier caliper is an instrument used to measure lengths. It's widely used to measure the external widths or diameters, internal widths or diameters and even depths of different objects.
This video summarizes all the concepts you can study under a vernier caliper.
It first presents about a general description about the caliper and then explains about the uses of its parts. The middle part of the video explains about the error in a caliper and the latter part explains as to how a certain measurement can be taken using a vernier caliper.
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