Physics And Measurement Question 282

Question: In a vernier callipers N division of vernier coincide with $ (N-1) $ divisions of main scale in which length of a division is 1 mm. The least count of the instrument in cm is

Options:

A) N

B) $ N-1 $

C) $ \frac{1}{10N} $

D) $ (1/N)-1 $

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Answer:

Correct Answer: C

Solution:

[c] $ L.C.=\frac{valueof1divisionofmainscale}{numberofdivisiononmainscale} $

$ =\frac{1}{N}mm=\frac{1}{10N}cm $



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