Question

The vernier constant of a travelling microscope is $0.001cm$. If $49$ main scale divisions coincide with $50$ vernier scale divisions, then the value of $1$ main scale division is :

• A. $0.01mm$
• B. $0.02cm$
• C. $0.05cm$
• D. $0.0005cm$

Answer 1

The correct option is C $0.05cm$

Vernier constant is the ratio of smallest division of the main scale to the number of divisions on the vernier scale.

$0.001cm=\frac{Smallestdivisiononmainscale}{50}\Rightarrow 1MSD=(0.001\times 50)=0.05cm$

Hence, Option C is correct.