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if each cm of main scale is divided in q...

if each cm of main scale is divided in q equal parts and p vernier scale divisions coincide with (p-1) main scale divisions then

A

1 vernier scale division `=1/q((p-1)/p) cm `

B

1 Vernier scale division `=q/p` cm

C

Vernier constant `=(q-1)/(pq)` cm

D

Vernier constant `=1/(pq)` cm

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The correct Answer is:
A, D
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