Vernier Callipers: Internal Diameter and Depth

The “Vernier Callipers: Internal Diameter and Depth” experiment is about accurately measuring the insides of things, like the inside width (or diameter) of a beaker and how deep it is using Vernier callipers. The main goal is to help students understand how the little scale on the callipers works, how to measure really precisely, and how these callipers are handy for measuring small dimensions.

Let’s understand some important points regarding this experiment:

Internal diameter:

The internal diameter is like the width inside a hollow object, like a pipe or a tube. It’s the distance from one side of the inside to the opposite side, going through the centre. 

Depth of a beaker:

The “depth” of the beaker refers to how deep or tall it is from the top rim to the bottom.

Main Scale:

The big, unmovable scale on the Vernier Calipers is the main scale. It gives you the main number part of your measurement and helps you put the callipers in the right spot for good measurements.

Vernier Scale:

The Vernier scale is a smaller scale that moves next to the main one. It helps you read the little bit extra that the main scale doesn’t cover.

Jaws:

The jaws are the parts of the Vernier callipers that touch the thing you’re measuring. There are two sets: one on top and one on the bottom. The top doesn’t move, but the bottom can slide along the big scale.

• Internal Jaws: These are for measuring inside things, like the diameter of a hole. You put the jaws inside the hole, open the calliper to touch the sides, and the ruler part gives you the diameter.
• External Jaws: These are used to measure things like the length of an object. You close the calliper around the object, and the numbers on the ruler part show the length.
• Tail: The tail or depth rod is a protrusion on the back end of the vernier calliper, perpendicular to the main scale. It accurately measures the depth of small holes, grooves, or depth of small things.

FAQ on Vernier Callipers