Question

What is the least count of metallic scale and vernier calipers?
What are the reasons of occurring of zeroes error?
How does varnier callipers decrease the least count of a scale?

Answer 1

Answer:

The difference in the magnitude of one main scale division (M.S.D.) and one vernier scale division (V.S.D.) is called the least count of the instrument, as it is the smallest distance that can be measured using the instrument. its mass, l its length, b its breadth and h the height.Vernier caliper least counts formula is calculated by dividing the smallest reading of the main scale with the total number of divisions of the vernier scale.LC of vernier caliper is the difference between one smallest reading of the main scale and one smallest reading of vernier scale which is 0.1 mm 0r 0.01 cm.

Explanation:

Any indication that a measuring system gives a false reading when the true value of a measured quantity is zero, e.g. the needle on an ammeter failing to return to zero when no current flows. A zero error may result in a systematic uncertainty.

Answer 2

1. The least count of metre scale is 1 millimetre and vernier calipers is 0.1 millimetre.

2. The reasons of occurring of zero are :-

1. wearing and tearing of jaw of vernier caliper.
2. fault in construction.

3.the least count of a vernier calliper can be increased by increasing the total number of division on vernier scale

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