What is the relation between main scale and vernier scale?

The vernier calipers have two scales: the main scale and the vernier scale. The 10 divisions on the vernier scale are equal to 9 divisions on the main scale. The difference between one main scale division and one vernier scale division is called the least count.

How do you read a vernier scale reading?

How to Read a Linear Vernier Scale

1. Read the main scale. Look for the last whole increment visible before the 0 (zero) mark.
2. Read the secondary scale (Vernier) measurement. This is the division tick mark that lines up best with a mark on the main scale.
3. Add the two measurements together.

What is vernier scale division?

One Vernier scale division (VSD) is the distance between two successive marks on the Vernier scale. It is given that 10 VSD = 9 MSD. Thus, 1 VSD = (9/10) MSD = 0.9 mm i.e., distance between two successive marks on the Vernier scale is 0.9 mm.

What measurement does the vernier scale give you?

The main scale on a Vernier caliper typically tells you the whole number plus the first decimal. Read this just as you would a ruler, measuring to the zero mark on the sliding (Vernier) scale. For example, if the 0 on the sliding scale lines up with the 2 inch mark, your measurement is 2 inches.

What is the main difference between main scale and vernier scale?

Let’s examine the image of the vernier caliper readings above. We will just use a two steps method to get the measurement reading from this: To obtain the main scale reading: Look at the image above, 2.1 cm is to the immediate left of the zero on the vernier scale. Hence, the main scale reading is 2.1 cm.

What is main scale reading?

The main scale reading is the first reading on the main scale immediately to the left of the zero of the vernier scale (3 mm), while the vernier scale reading is the mark on the vernier scale which exactly coincides with a mark on the main scale (0.7 mm). The reading is therefore 3.7 mm.

What is vernier scale in short?

A small, movable auxiliary graduated scale attached parallel to a main graduated scale and calibrated to indicate fractional parts of the subdivisions of the larger scale. Vernier scales are used on certain precision instruments to increase accuracy in measurement.

What is main scale reading in vernier calliper?

The main scale reading is that to the left of the zero on the vernier scale. The vernier reading is found by locating the best aligned lines between the two scales. The 0.02 mm engraving indicates the caliper’s readability and is the “vernier constant” for this scale.

What is least count of main scale and vernier scale?

Its vernier scale is divided into 10 divisions which coincides with 9 divisions of the main scale.

What is the main scale?

A Vernier scale is used to take an accurate measurement for a reading between two markings on a linear scale which is done by using the mechanical interpolation; thereby increasing resolution and reducing measurement error whereas the scale on the larger, fixed portion of the caliper which gives the most significant …

What is vernier scale for Class 9?

Vernier scale helps to measure length correctly up to 0.1 mm. Outside jaws or External jaws to measure length of a rod, diameter of a sphere, external diameter of a hollow cylinder. Inside jaws or Internal jaws measure the internal diameter of a hollow cylinder of a hollow cylinder or pipe.