A vernier caliper has a main-scale division of 1 mm. Ten vernier divisions coincide with seven main-scale divisions. The vernier zero lies just to the right of the 33rd main-scale division and the fourth vernier division coincides with a main-scale mark. If the reading is 0.83K cm, find K.
Physics · Mixed Chapter
JEE Main Practice

Question

A vernier caliper has a main-scale division of 1 mm. Ten vernier divisions coincide with seven main-scale divisions. The vernier zero lies just to the right of the 33rd main-scale division and the fourth vernier division coincides with a main-scale mark. If the reading is 0.83K cm, find K.

Physics · Mixed Chapter

G1 Physics · Accepted Answer

Step 1: 1 MSD = 1 mm and 10 VSD = 7 mm, so 1 VSD = 0.7 mm. Step 2: Least count = 1 − 0.7 = 0.3 mm. Step 3: Reading for 33 MSD is 33 + 4(0.3) = 34.2 mm = 3.42 cm. This does NOT equal 0.83K cm for single-digit K. The PDF gives K = 4; its reading/scale statement is inconsistent. Do not replace the conflicting data silently.