The least count of an instrument is the smallest measurement that can be taken accurately Vernier callipers are widely used in scientific laboratories and in. 6 Jul Vernier caliper least count formula is calculated by dividing smallest reading of main scale with total number of divisions of vernier scale. Least Count plays an important role in measurement devices like Vernier Caliper. This blog explains the procedure of calculating the least count of the metric.

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Vernier caliper least count formula is calculated by lwast smallest reading of main scale with total number of divisions of vernier scale. For example, a sundial may only have scale marks representing the hours of daylight; it would have a least count of one hour. A stopwatch used to time a race might resolve down to a hundredth of a second, its least count.

Least count – Wikipedia

Otherwise, the instrument has an error called zero error. The thickness or external diameter of an object. Divide 1 cm into that much number of divisions; the value obtained is the least count of the main scale in cm. Difference between potentiometer and voltmeter in tabular form. Instruments of higher precision can reduce the least count error.

Least count of an instrument is one of the very important tools in order to get accurate readings of instruments like vernier caliper and screw gauge used in various experiments. How to find Vernier caliper least count formula?


The jaws A and B are fixed where B and D are moveable. The least count of measuring device plays an important role for measurement. The least count error is the error associated with the resolution of the instrument.

If the zero of the Vernier scale is to the left of the zero of the main scale then the error is negative. Count the number of divisions on the Vernier scale. Since the zero error cpunt positive, the zero correction will be negative.

The stopwatch is more precise at measuring time intervals than the sundial because it has more “counts” scale intervals in each hour of elapsed time. Any measurement made by the instrument can be considered repeatable to no less than the resolution of the least count. By repeating the observations and taking the arithmetic mean of the result, the mean value peast be very close to the true value of the measured quantity.

Vernier caliper is an instrument used to measure the length, diameter, radius etc. In metrologythe least count of a measuring instrument is the smallest change in the measured quantity that can be resolved on the instrument’s scale. We can learn about the use of V. Hand tools Created Date: When the jaws of Vernier calipers are brought into contact, the zero of the Vernier must coincide with the zero of the main scale. LC of vernier caliper is the difference between one smallest reading of main scale and one smallest reading of vernier scale which is 0.

Vernier caliper least count formula-PhysicsAbout

Since the least count of the Vernier caliper is 0. Comments Created By claiper The main scale is calibrated in millimeters. The least count of an instrument is inversely proportional to the precision of the instrument. Since the zero error is negative, the zero correction will be positive.

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Use of Vernier Calipers

Counh scientific notation numbers are The movable jaws are attached to the vernier and they slide along the main scale. Friedenwald, ; page 1. C with the help of an example by measuring the area of the cross-section of a solid cylinder by measuring its diameter with Vernier caliper.

Your email address will not be published. The upper jaws C and D are used to measure the internal diameter of objects like a hollow cylinder or tube. Zero error can be negative or positive.

The lower jaws A and B are used to measure length. Least count of the main scale: From Wikipedia, the free encyclopedia. Least count uncertainty is one of the sources of experimental error in measurements. The main scale is graduated is centimeter while Vernier scale slides along the main scale and is graduated in division less than the millimeter.

In most Vernier calipers, the Vernier scale has 10 divisions.