Describe in steps how would you use a vernier callipers to measure length of a rod?
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Answer:
Vernier caliper has main jaws that are used for measuring external diameter, as well as smaller jaws that are used for measuring the internal diameter of objects. Some models also have a depth gauge. The main scale is fixed in place, while the Vernier scale is the name for the sliding scale that opens and closes the jaws.[1]
Each scale of your caliper reads like an ordinary ruler. Typically, a caliper has a main scale marked with numbered inches or centimeters, plus smaller divisions between them. The sliding (Vernier) scale should have a label engraved on it to tell you what it represents.[2]
If the sliding scale doesn't have a label, you can assume the numbered divisions represent 1/10 of the smallest division on the main scale. For example, if the main scale's smallest lines represent 0.1 inches, then each numbered division on the Vernier scale represents 0.01 inches.
The main scale is "life size," while the sliding scale is magnified for easy reading. This magnification system allows the Vernier caliper to measure more precisely than a ruler
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