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Units and Dimensions

The least cou...

Question

The least count of a vernier calipers having 20 vernier divisions when 1 M.S.D. = 0.1 cm is :

0.5 mm

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0.05 cm

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0.05 mm

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0.5 cm

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Solution

The correct option is A 0.05 mm
The least count of vernier calipers is $L . C =$ (1 M.S.D / total number of vernier divisions )
So, $L . C = \frac{0.1 c m}{20} = 0.005 c m = 0.05 m m$

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