JEE Main 2024 Physics question
One main scale division of a vernier caliper is equal to m units. If nth division of main scale coincides with (n + 1)ᵗʰ division of vernier scale, the least count of the vernier caliper is:
Answer: (B)
Solution
n MSD = (n + 1) VSD, so 1 VSD = (n/(n + 1)) MSD. Least count = 1 MSD − 1 VSD = m − mn/(n + 1) = m/(n + 1).