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Accuracy and Precision

Vernier calip...

Question

Vernier calipers has its main scale 10 cm equally divided into 250 parts. Its vernier scale is of 50 division and coincide with 15 mm of the main scale. The least count of the instrument is :

A

0.01 cm

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B

0.02 cm

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C

0.001 cm

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D

0.002 cm

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Solution

The correct option is B 0.01 cm
Least count $= 1 M S D - 1 V S D = \frac{10}{250} - \frac{1.5}{50} = 0.04 - 0.03 = 0.01 c m$

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