Oswaal CBSE Laboratory Manual For Class 11 Physics

Oswaal CBSE Laboratory Manual For Class 11 Physics
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Oswaal CBSE Laboratory Manual For Class 11 Physics

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Publisher: Oswaal Books
ISBN: 9789351276180
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Chapter 1 USE OF VERNIER CALLIPERS Concepts Vernier Callipers was invented by a French mathematician Pierre Vernier. It is used to measure the length of a rod or cylinder, diameter of a sphere, the internal and external diameter of a hollow cylinder and the depth of a small vessel. The construction of vernier callipers is shown in the labelled Fig. AE1.1. It consists of a steel strip graduated in cm. This is called the main scale. There is another strip known as vernier scale which can slide over the main scale, and is graduated with the number of divisions. The vernier scale can be fixed at any position on the main scale by means of a screw. There are two jaws perpendicular to the main scale. One of the jaw is fixed at the left end of the main scale and other jaw is fixed on the frame of the vernier scale. The lower outside jaws are used to measure the length or the external diameter of an object rod or cylinder and the upper inside jaws are used to measure the internal diameter of a hollow cylinder. The vernier callipers is provided with a long thin strip attached at the back of the main scale. This strip is used to measure the depth of any small vessel. This strip is also known as depth measuring prong. Inner measuring jaws
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