The vernier scale of a callipers has 50

\( \newcommand\) • • • • • • Looking at anearly caliper, you'll notice that it looks like a tomahawk and has a scale down it's length. More about the scale later. On the bottom left, the "blade of the hatchet" are the jaws of the caliperfor measuring outsidedimensions- think of a tube. This would measure the outside diameter. The "pike" on top of the hatchet is used for measuring inside dimensions. Again, think of a tube's inside diameter. Looking all the way to the right...I know it's hard to see...but there's a little "tail" sticking out of the center of the handle. That will measure the depthof a step or some other similar feature. That little button on the top near the "pike" is a locking screw. The one just below it is a thumb button. Step 1: Holding the Caliper This is the proper way to hold a caliper. Use your thumb to slide the jaws open and closed. Yup, another tool that was totally designed for righties. Use the locking screw at the top if you want to set a dimension on the caliper and then check parts against your setting. Though it may not look it, the measurement between the inside and outside jaws are EXACTLY the same. Step 2: Course Reading #1 So let's read a measurement off of the caliper. First, a quick math refresher. Whole numbers (1,2,3, etc.) are followed by a decimal point and an endless number of zeros (2.000000). We are going to be working with the 3 places to the right of the decimal point. The first number to the right of the decimal point is a te...

A vernier scale which is named after Pierre Vernier is defined as a visual aid to take an accurate measurement reading between two graduation markings on a linear scale by using mechanical interpolation. It is used to calculate the internal and external diameters of hollow cylinders. It is also used for the measurement of diameters of round objects with the help of the measuring jaws. It is an extremely precise measuring instrument. It is a device that is used to calculate very accurate linear measurements. In simple words, it measures the straight linear distance between two points. It is a very useful tool to carry in the toolbox. A vernier caliper is also used to measure the diameter of round and cylindrical objects, by positioning the jaws of the caliper on either side of the circumference. Vernier caliper is a very useful tool to carry in the toolbox. Vernier Scale The vernier scale measures accurate dimensions. It has two scales; a normal large scale (main scale) and a scale inside it is used to calculate measurements without any error. The vernier scale gives accurate measurement because it is based on the concept of vernier acuity. The vernier acuity is a type of visual acuity which measures the misalignment of two line segments. The human eye can easily detect aligned and non-aligned lines. The vernier caliper generally shows either metric or imperial measurements, but some calipers measure in both. Uses of Vernier Caliper There are three major uses of Vernier Cal...

Q. In an experiment the angles are required to be measured using an instrument. In this instrument, 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. If the smallest division of the main scale is half degree ( = 0.5 o ), then the least count of the instrument is:

Fig. 3: The small scale slides along the main scale. The Vernier scale, which runs next to the main scale, is designed so that ten of its division have the same length as nine of the divisions on the main scale. In figure 2 the markings on the main scale are at (say) 1mm intervals, while those on the Vernier scale are at 0.9mm intervals. The difference between these sizes tells us what precision the Vernier scale will measure to, in this case 0.1mm. When you take a reading, the Vernier scale will slide along the main scale as shown in figure 3. Images adapted from The Open Door Web Site To take a reading: • Look where the zero mark on the Vernier scale meets the main scale. This gives us our rough reading, between 1.21 and 1.23 in the example above. • Now look to find the mark on the Vernier scale which most closely meets a mark on the main scale. In this example it is the second mark along (not counting the zero mark), which gives us our value for the most precise digit, in this case 2. So the reading is 1.22cm