give reason for using upper jaws of the vernier calipers to find inner diameter of cylindrical pipe.
Answers
Vernier Callipers is an instrument that is used widely in scientific laboratories to make accurate linear measurements and also for quality control measurements.
The vernier calipers can be used for measuring the length of a rod or any object, diameter of a sphere, depth of a small beaker, and to measure the internal and external diameter of a hollow cylinder.
The vernier calipers has a main scale, vernier scale, screw, 2 jaws, and a strip.
The 2 jaws, called as the upper jaw and lower jaw help in holding the object and for measuring the length.
The lower jaw is used for measuring the external diameter of a cylinder and the upper jaw or the inside jaws is used for measuring the internal diameter of hollow cylinder.
The upper jaws are smaller in size, curved inside, and are used for measuring the inside dimensions of hollow objects like cylinders etc.
Vernier Calipers consist of Two jaws :
1. Outside Jaws or lower jaws
2. Inside Jaws or upper Jaws.
Outside Jaws are used to measure the length of rod, external diameter of sphere
Whereas , Upper jaws are used to measure the internal diameter of a hollow cylinder.
Upper Jaws are curved inside ,smaller in size and its structure which holds the object internally, makes it to fit to measure the internal diameters of an object.
