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0 votes
2.2k views
in Physics by (44.7k points)

In an unusual vernier, 9 vernier scale divisions coincide with 8 main scale division, then what is the least count of the vernier? 

(A) (8/9) mm 

(B) (1/9) mm 

(C) (1 / 17) mm 

(D) (1/8) mm

1 Answer

+1 vote
by (69.7k points)
selected by
 
Best answer

The correct option is (B) (1/9) mm.

Explanation:

Given: 8 main scale division = 9 vernier scale division 

∴ 8M = 9V 

Least count is M – V 

∴ LC = M – V 

= M – (8/9) M 

= (M/9) mm 

= (1/9) mm

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