Question

1. If the number of vernier scale divisions is 20 and minimum main scale division is
1 mm, then Least count of vernier calipers is:
A. 0.5 mm B. 0.05 mm
B. 0.01 mm C. 0.005 mm

Answer 1

Answer:

1mm least count of vernier calliper is 0.05

Explanation:

Answer 2

Answer:

Option B is correct. The least count of vernier calipers is 0.05mm.

Explanation:

The main scale of vernier calipers has marks =  1 mm

20 vernier scale divisions = 1 main scale division (given)

Given:

The number of vernier scale divisions is 20.

To find:

The least count of vernier calipers is___?

20 vernier scale divisions = 1 main scale division.

1 vernier scale divison =  $\frac{1}{20}$ = 0.05 mm

To find the least count, use the formula of least given by

least count(LC)= 1 main scale division - 1 vernier scale division

                        = 1 mm - 0.05mm

                        = 0.05 mm

Therefore, the least count of vernier calipers is 0.05mm

Hence, Option B is correct.

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